Tuesday, August 2, 2022

How to fix "illegal start of expression" error in Java? Example

The "illegal start of expression" error is a compile-time error when the compiler finds an inappropriate statement in the code. The java compiler, javac, compile your source code from top to bottom, left to right and when it sees something inappropriate at the start of an expression, it throws an "illegal start of expression" error. The most common reason for this is a missing semi-colon. You might know that every statement in Java ends with a semicolon, but if you forget one, you won't get an error that there is a missing semi-colon at the end of the statement because the compiler doesn't know the end.

When the compiler checks the next statement it sees an illegal start because an earlier statement was not terminated. The bad part is that you can get tens of "illegal start of expression" errors by just omitting a single semi-colon or missing braces, as shown in the following example.

public class Main {

  public static void main(String[] args) {
    count();
  

  public static int count() {
    return 0;
  }

}

If you compile this program you will be greeted with several "illegal start of expression" error as shown below:


$ javac Main.java
Main.java:7: error: illegal start of expression
  public static int count() {
  ^
Main.java:7: error: illegal start of expression
  public static int count() {
         ^
Main.java:7: error: ';' expected
  public static int count() {
               ^
Main.java:7: error: ';' expected
  public static int count() {
                           ^
Main.java:11: error: reached end of file while parsing
}
 ^
5 errors


And the only problem is missing curly braces in the main method, as soon as you add that missing closing curly brace in the main method the code will work fine and all these errors will go away, as shown below:

How to fix "illegal start of expression" error in Java


The error message is very interesting, if you look at the first one, you will find that error is in line 7 and the compiler complaining about a public keyword but the actual problem was in line 5 where a closing brace is missing. 

From the compiler's view, the public should not come there because it's an invalid keyword inside a method in Java, remember without closing braces main() is still not closed, so the compiler thinks the public keyword is part of the main() method.

Though, when you compile the same program in Eclipse, you get a different error because its the compiler is slightly different than javac but the error message is more helpful as you can see below:

Exception in thread "main" java.lang.Error: Unresolved compilation problem:
Syntax error, insert "}" to complete MethodBody

at Main.main(Main.java:4)


In short, the "illegal start of expression" error means the compiler find something inappropriate, against the rules of Java programming but the error message is not very helpful. For "illegal start of expression" errors, try looking at the lines preceding the error for a missing ')' or '}' or missing semicolon. 

Also remember, a single syntax error somewhere can cause multiple "illegal start of expression" errors. Once you fix the root cause, all errors will go away. This means always recompile once you fix an error, don't try to make multiple changes without compilation.

Other Java troubleshooting guides you may like:
  • How to fix "variable might not have been initialized" error in Java? (solution)
  • Could not create the Java virtual machine Invalid maximum heap size: -Xmx (solution)
  • How to fix class, enum, or interface expected error in Java? (solution)
  • How to fix java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory (solution)
  • Caused By: java.lang.NoClassDefFoundError: org/apache/log4j/Logger in Java (solution)
  • Error: could not open 'C:\Java\jre8\lib\amd64\jvm.cfg' (solution)
  • java.lang.OutOfMemoryError: Java heap space : Cause and Solution (steps)
  • How to avoid ConcurrentModificationException while looping over List in Java? (solution)

78 comments:

  1. thanks this really helped alot

    ReplyDelete
    Replies
    1. Hello @Unknown, can you provide more details so that we can help you better?

      Delete
    2. import java.lang.*;
      import java.io.*;
      import java.util.*;
      class keyboard
      {
      public static void main(String s[] )throws IOException
      {
      int a[]= Integer.parseInt(a[10]);
      int b[]=Integer.parseInt(b[10]);
      int c[]=Integer.parseInt(c[10]);
      InputStreamReader obj1= new InputStreamReader(System.in);
      BufferedReader obj2=new BufferedReader(obj1);
      System.out.println(a);
      System.out.println(b);
      System.out.println(c);
      }
      }

      Delete
  2. System.out.println("I'm fine.";) What I'm I missing

    it should look like (I'm fine). on the display

    ReplyDelete
    Replies
    1. your semicolon is inside the parentheses, and if you want to see the parentheses you will have to put it inside the " " cause it only prints whats inside those

      Delete
    2. What if the main problem is the public static void main(string args)

      Delete
  3. here is my program please tell what is the mistake...


    class marks
    {
    void main(int a)
    {
    if (a>40)
    System.out.println("pass");
    }
    else
    {
    System.out.println("fail");
    }
    }

    ReplyDelete
    Replies
    1. couple of mistakes, first 1. class is not close with "}" which is missing
      2. syntax of main method is not correct, if you really intent to use main() method

      Delete
  4. // whats the mistakes?
    // Java program to Draw a
    // Smiley using Java Applet
    import java.applet.*;
    import java.awt.*;
    import java.util.*;

    class Rextester
    {
    public static void main(string[] args)
    {
    public class Rextester extends Applet {
    public void paint(Graphics g)
    {
    // Oval for face outline
    g.drawOval(80, 70, 150, 150);
    // Ovals for eyes
    // with black color filled
    g.setColor(Color.BLACK);
    g.fillOval( 120, 120, 15, 15);
    g.fillOval(170, 120, 15, 15);
    // Arc for the smile
    g.drawArc(130,180,50,20,180,180);
    }
    }
    }
    }

    ReplyDelete
    Replies
    1. you are declaring a class inside a static method, that cannot be public.

      Delete
    2. S would be capital in main(String args[])

      Delete
  5. Hi, may I know what is the mistakes?

    public class Recognizer {
    public static void main(String[] args)
    {
    private static final int MAXN=10;
    private static final int MAXNUM=9;
    private static final int[][][][] count=new int[MAXN][MAXN][2][MAXNUM+1];
    private static final int[] count2=new int[MAXNUM+1];
    private static final double[][][][] po=new double[MAXN][MAXN][2][MAXNUM+1];
    private static final double[] po2=new double[MAXNUM+1];


    public static double[] recognize(boolean[][] input)
    {
    double[] result=new double[MAXNUM+1];
    for (int i=0;i<=MAXNUM;i++)
    {
    result[i]=1;
    for (int j=0;j<MAXN;j++)
    for (int k=0;k<MAXN;k++)
    if (input[j][k])
    result[i]*=po[j][k][1][i];
    else
    result[i]*=po[j][k][0][i];
    result[i]*=po2[i];
    }
    return result;
    }
    }
    }

    ReplyDelete
  6. Guys can you help me? What the wrong mistake in my code :(

    public class BubbleSort {
    public String version()
    { return "1.2.02";}
    static void BubbleSort(int[] angka) {
    for (int i = 0; i < angka.length; i++) {
    for (int j = 0; j < angka.length-1; j++) {
    if (angka[j]>angka[j+1]){
    int temp = angka [j];
    angka [j] = angka[j+1];
    angka[j+1] = temp;

    }

    }
    }
    main(String[] .class); {
    int [] angka=(9);

    for (int i = 0; i < angka.length; i++){
    System.out.print(angka[i]+" ");
    }
    };
    System.out.println("");
    BubbleSort(angka);
    for (int i = 0; i < angka.length; i++){
    System.out.print(angka[i]+" ");
    });
    }
    }

    ReplyDelete
  7. import java.io.*;
    import java.util.*;
    class calci{
    int a,b,c,d,e,f,g;{
    Scanner cal= new Scanner(System.in);
    System.out.println("Enter the first number :");
    a = cal.nextInt();
    System.out.println("Enter the second number :");
    b = cal.nextInt();

    public static int add()
    {
    c=a+b;
    System.out.println("Addition of 2 numbers is"+c);
    return c;
    }

    public static void sub()
    {
    d=a-b;
    System.out.println("Subtraction of 2 numbers is ="+d);
    return d;
    }
    public static int mul()
    {
    e=a*b;
    System.out.println("Multiplication of 2 numbers is ="+e);
    return e;
    }

    public static int div()
    {
    f=a/b;
    System.out.println("Division of 2 numbers is ="+f);
    return f;
    }

    public static int mod()
    {
    g=a%b;
    System.out.println("Modulo of 2 numbers is ="+g);
    return g;
    }
    }
    }



    class calculator_2{
    public static void main(String [] args){
    int ch;
    System.out.println("1.ADDITION \n2.SUBTRACTION \n3.MULTIPLICATION \n4.DIVISION \n5.MODULO");
    calci obj=new calci();
    Scanner in =new Scanner(System.in);
    System.out.println("Enter Your Choice :\t");
    ch = in.nextInt();

    switch(ch)
    {
    case 1: obj.add();
    break;
    case 2: bj.sub();
    break;
    case 3: obj. mul();
    break;
    case 4: obj.div();
    break;
    case 5: obj.mod();
    break;
    default :System.out.println("option not avilable");
    break;
    }
    }
    }

    ReplyDelete
  8. My program is showing error in public static void

    ReplyDelete
    Replies
    1. can you post your program here?

      Delete
    2. Poor Javin got flooded by help requests.

      Delete

  9. 1
    public class temperature
    2
    {
    3
    public static void main(String []args)
    4
    {
    5
    double tempC,tempF;
    6
    if(choice==0)
    7
    {
    8
    tempC = 37;
    9
    tempF = (tempC*1.8F)+32;
    10
    System.out.println("temperature in farenheit is " +tempF);
    11
    }
    12
    else if (choice==2)
    13
    {
    14
    tempF = 98.4;
    15
    tempC = (tempF-32)/1.8F;
    16
    System.out.println("farenheit in temperature is " +tempC);
    17
    }
    18
    else
    19
    System.out.println("enter 1 for-C-to -F and 2 for F-to -C conversion");
    20
    }
    21
    }
    22

    23

    This code is editable. Click Run to Compile + Execute
    Line 7: error: illegal start of expression
    if(choice = =0 )
    ^
    Line 13: error: illegal start of expression
    else if (choice = = 2)
    ^
    2 errors



    what are the mistakess in this?

    ReplyDelete
    Replies
    1. because you have not declared the "choice" variable before using it. Just declare choice at the first line of main method like int choice = 0 it will work.

      like
      int choice=0;

      double tempC, tempF;

      if (choice == 0)

      {

      Delete
  10. import java.util.Scanner;
    class salpha{
    public static void main(String args[]){
    Scanner b=new Scanner(System.in);
    System.out.println("enter size");
    int n;
    n=b.nextInt();
    for(int i=0;i<=n;i++){
    for(int j=0;j<=n;j++){
    if(( i==0||i==n)&& i!=0 ||i==0 &&j!=0 && j!=n||)


    System.out.print("*");
    else

    System.out.print(" ");




    }
    System.out.println();

    }
    }
    }

    IT WAS SHOWING MISTAKE AT IF ILLEGAL START OF EXPRESSION

    ReplyDelete
  11. You can also get this for the -> Symbol in removeIf.. When using Java version < 8...

    ReplyDelete
    Replies
    1. absolutely true, and the judging system of my university uses Java 1.8...

      Delete
  12. public static void main(String [] args){
    System.out.println("your art goes here");
    System.out.println("across many lines");
    }
    . ________ .
    System.out.println(" /\\ / \\ \\\\ \\ / \\");
    System.out.println(" / \\ / . \\ _____ \\ ____ \\ / . \\");
    System.out.println("/ | \\ \\ / / \\___\\ / / | | \\ | / / \\___\");
    System.out.println("| | \\ | | | / / \\ | | | | | |");
    System.out.println("| | \\ | | | / /_____ | | | | | |");
    System.out.println(" | |____| | \\ | | / / | | | | | |");
    System.out.println(" | ______ | | | /_____ / | | | | | |");
    System.out.println(" | | | | | | / / | | | | | |");
    System.out.println("| | | | | | ___ / / | | / | | | "); __");
    System.out.println("| | | | \\ \\./ / / / | |__/ | \\ \\./ /");
    System.out.println("/ \\ / \\ \\ / / / / / \\ /");
    System.out.println("\\./ \\./ \\./ / /________/ \\./ ");}


    can i know he error in that program

    ReplyDelete
    Replies
    1. I think it's because you ended the code after the first two println's you need to move your curly brace to the end of the program for it to work.

      Delete
  13. /* Leap year __________
    ____________ Created by Sourav Dutta*/

    import java.util.Scanner ;

    public class Program
    {
    public static void main(String[] args) {
    public static boolean isLeapYear(int year) {
    year=1600;

    if (year % 4 != 0) {
    return false;
    }
    else if (year % 400 == 0) {
    return true;
    }
    else if (year % 100 == 0) {
    return false;
    }
    else {
    return true;}


    }}}

    ReplyDelete
    Replies
    1. Nice one Sourav, but you can optimize the logic by using switch statement, it would be much cleaner to read.

      Delete
  14. Can you help me on this program

    import java.util.Scanner;
    public class DemoVariables
    {
    int entry;
    Scanner keyBoards = new Scanner(System.in);
    System.out.print("Enter an integer");
    entry = keyBoard.nextInt();

    public static void main(String[] args)
    {
    System.out.print("The other entry is");
    System.out.println("anotherEntry");
    System.out.println(entry + " plus " +
    anotherEntry + " is " + ( entry + anotherEntry));
    System.out.println(entry + " minus " +
    anotherEntry + " is " + (entry - anotherEntry));
    System.out.println(entry + " times " +
    anotherEntry + " is +(entry * anotherEntry));
    System.out.println(entry + " divided by " +
    anotherEntry + " is " + (entry / anotherEntry));
    System.out.println("The remainder is" +
    (entry % anotherEntry));
    }
    }


    ReplyDelete
  15. Code:
    import java.io.*;
    class SwitchMethod{
    public static void main(String[] ar) throws IOException{
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    System.out.println("Enter a Choice of Your Number From 1 to 4 :");
    int ch = Integer.parseInt(br.readLine());
    SwitchMethod sm= new SwitchMethod();
    switch(ch){
    case 1:
    void add() throws IOException{
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    System.out.print("Enter First Value:");
    int x = Integer.parseInt(br.readLine());
    System.out.print("Enter Second Value:");
    int y = Integer.parseInt(br.readLine());
    int z = x+y;
    System.out.println(" Sum of " +x+ " and " +y+ " is: " +z);
    sm.add();
    }
    break;
    case 2: sm.sub();
    break;
    int sub() throws IOException{
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    System.out.println("Enter First Value:");
    int a = Integer.parseInt(br.readLine());
    System.out.println("Enter Second Value:");
    int b = Integer.parseInt(br.readLine());
    int c = a-b;
    return c;
    int res = sm.sub();
    System.out.println("Sum:"+res);
    }
    case 3: sm.mul(a,b);
    break;
    void mul(int x,int y) throws IOException{
    int z = x*y;
    System.out.println("Multiplying " +x+ "*" +y+ "is:" +z);
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    System.out.println("Enter First Value:");
    int a = Integer.parseInt(br.readLine());
    System.out.println("Enter Second Value:");
    int b = Integer.parseInt(br.readLine()); mp.mul(a,b);
    }
    case 4: int div(int x,int y) throws IOException{
    int z = x/y;
    return z;
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    System.out.print("Enter First Value:");
    int a = Integer.parseInt(br.readLine());
    System.out.print("Enter Second Value:");
    int b = Integer.parseInt(br.readLine());
    int res = sm.div(a,b);
    System.out.println("Sum: " +res);
    }
    break;

    default: System.out.println("Wrong Choice");
    }
    }
    }

    ReplyDelete
  16. Command Prompt:
    SwitchMethod.java:10: error: illegal start of expression
    void add() throws IOException{
    ^
    SwitchMethod.java:10: error: ';' expected
    void add() throws IOException{
    ^
    SwitchMethod.java:10: error: not a statement
    void add() throws IOException{
    ^
    SwitchMethod.java:10: error: ';' expected
    void add() throws IOException{
    ^
    SwitchMethod.java:23: error: ';' expected
    int sub() throws IOException{
    ^
    SwitchMethod.java:23: error: not a statement
    int sub() throws IOException{
    ^
    SwitchMethod.java:23: error: ';' expected
    int sub() throws IOException{
    ^
    SwitchMethod.java:36: error: illegal start of expression
    void mul(int x,int y) throws IOException{
    ^
    SwitchMethod.java:36: error: ';' expected
    void mul(int x,int y) throws IOException{
    ^
    SwitchMethod.java:36: error: expected
    void mul(int x,int y) throws IOException{
    ^
    SwitchMethod.java:36: error: ';' expected
    void mul(int x,int y) throws IOException{
    ^
    SwitchMethod.java:36: error: not a statement
    void mul(int x,int y) throws IOException{
    ^
    SwitchMethod.java:36: error: ';' expected
    void mul(int x,int y) throws IOException{
    ^
    SwitchMethod.java:45: error: ';' expected
    case 4: int div(int x,int y) throws IOException{
    ^
    SwitchMethod.java:45: error: expected
    case 4: int div(int x,int y) throws IOException{
    ^
    SwitchMethod.java:45: error: ';' expected
    case 4: int div(int x,int y) throws IOException{
    ^
    SwitchMethod.java:45: error: not a statement
    case 4: int div(int x,int y) throws IOException{
    ^
    SwitchMethod.java:45: error: ';' expected
    case 4: int div(int x,int y) throws IOException{
    ^
    18 errors

    ReplyDelete
  17. just copy paste your code into an IDE like Eclipse and it will tell you what is wrong with that instead of giving so many errors.

    ReplyDelete
  18. public class Dog{
    private String breed;
    private int age;
    private boolean isBarking;

    public Dog(String breed, int age){
    this.breed = breed;
    this.age = age;
    }
    void barking(){
    isBarking = true;
    }
    }
    public class DogTest{
    public static void main(String[] args){
    Dog pet1 = new Dog("Poodle", 3);
    System.out.println(pet1.breed);

    //Setter for breed
    class main {
    public void SetBreed(String breed){
    this.breed = breed;
    }

    }
    //Getter for breed
    public String getBreed(){
    return breed;
    }
    public class DogTest{
    public static void main(String[] args){
    Dog pet1 = new Dog ("pitbull", 4);
    System.out.println(pet1.getBreed);
    pet1.setBreed("poodle");
    }
    }
    //Setter for age
    public void SetAge(int age){
    this.age = age;

    }
    //Getter for age
    public int getAge(){
    return age;
    }
    public class DogTest{
    public static void main(String[] args){
    Dog pet1 = new Dog (age, 5);
    System.out.println(pet1.getAge);
    pet1.setAge(age);
    }
    }




    ReplyDelete
  19. I dont understand my edit

    public class Dog{
    private String breed;
    private int age;
    private boolean isBarking;

    public Dog(String breed, int age){
    this.breed = breed;
    this.age = age;
    }
    void barking(){
    isBarking = true;
    }
    }
    public class DogTest{
    public static void main(String[] args){
    Dog pet1 = new Dog("Poodle", 3);
    System.out.println(pet1.breed);

    //Setter for breed
    class main {
    public void SetBreed(String breed){
    this.breed = breed;
    }

    }
    //Getter for breed
    public String getBreed(){
    return breed;
    }
    public class DogTest{
    public static void main(String[] args){
    Dog pet1 = new Dog ("pitbull", 4);
    System.out.println(pet1.getBreed);
    pet1.setBreed("poodle");
    }
    }
    //Setter for age
    public void SetAge(int age){
    this.age = age;

    }
    //Getter for age
    public int getAge(){
    return age;
    }
    public class DogTest{
    public static void main(String[] args){
    Dog pet1 = new Dog (age, 5);
    System.out.println(pet1.getAge);
    pet1.setAge(age);
    }
    }




    ReplyDelete
    Replies
    1. Sorry, didn't get you? what error you are getting with your code? can you paste the error message?

      Delete
    2. What the mistake in my code



      import java.util.Scanner;

      public class TaxIncome {
      public static void main(String[] args) {

      double TaxableIncome;
      double Deductions;
      double TaxAmount;
      String Status;
      double RATE1 = 0.10;
      double RATE2 = 0.20;
      double RATE3 = 0.35;

      Scanner scan = new Scanner (System.in);
      System.out.print("INCOME TAX CALCULATOR: ");

      public double TaxIncome(double IncomeTax, double Deductions, String Status) {
      this.IncomeTax = IncomeTax;
      this.Deductions = Deductions;
      this.Status = status;

      }

      public void setDeductions( double deductions) {
      Deductions a = Dedeuctions;

      }

      public double getTaxableIncome() {
      return TaxableIncome;

      }

      public double CalculateTaxincome() {
      if (Status.equals("single")) {
      //nasted if
      if ( TaxIncome >= 21000 ) {
      Income_tax_amount = Total_income * RATE1;

      } else {
      Income_tax_amount = Total_income * RATE2;
      }
      }

      return TaxAmount;
      }











      }
      }


      Delete
    3. Deductions a = Dedeuctions; >> this one
      should be
      deductions a = Dedeuctions; but better use a different name like currentDeductions etc

      Delete
  20. I'm getting an illegal error in my code can you help
    import java.util.Scanner;
    import java.io.File;
    import java.io.IOException;

    public class FileReader {
    private static Scanner fileScanner;

    /**
    * This method, called beginScanning, is public, static and has one parameter, a String
    * representing the name of the input file.
    *
    * Write a try-catch block in order to first create a File object, and then
    * create a Scanner for the File object. Use the Scanner to read the first
    * line of the file but do nothing with that line, as the header line in
    * the file should not contribute to the statistics.
    *
    * @param fileName A String; from readFile() of the FileIO class.
    */
    public static void beginScanning(String fileName) {
    try{
    fileScanner = new Scanner(new File(fileName));
    fileScanner.nextLine();
    }catch (FileNotFoundException e) {
    e.printStackTrace();
    }
    }

    /**
    * This is a public, static method called hasMoreLines which returns a boolean. This method
    * should return true as long as the FileReader class Scanner object is not
    * null and the Scanner object has additional lines in the input file to read.
    *
    * @return A boolean; to readFile() in class FileIO.
    */
    public static boolean hasMoreLines() {
    return fileScanner != null && fileScanner.hasNextLine();
    }

    return false;


    /**
    * This is a public, static method called getNextLine which returns a String. This String
    * represents one line from the input file.
    *
    * Use the FileReader class Scanner object to read one line and return the
    * result.
    *
    * @return A String; to readFile() in FileIO.
    */
    public static String getNextLine() {
    if(fileScanner != null ) {
    return fileScanner.nextLine();
    }

    return "";

    }
    }

    ReplyDelete
    Replies
    1. Just post this code in any IDE like Eclipse and it will you which line has the error.

      Delete
  21. public class MyClass {
    public static void main(String args[]) {
    for (int i=0;i<100; i++);) {
    System.out.println(i);};
    }
    }

    ReplyDelete
    Replies
    1. What is the problem with this code? looks good to me from naked eyes, are you getting any error?

      Delete
  22. hello may i know what is the mistake? its keep going illegal start of expression in line 3
    public class isTriangle{
    public static void main (String[] args){
    public static boolean isTriangle(int a,int b,int c){
    if (a > 0 && b > 0 && c > 0 && a + b > c && a + c > b && b + c > a){
    return true;
    }else{
    return false;}
    }

    }

    ReplyDelete
    Replies
    1. Hello @Unknown, you need to use parenthesis to write the expression, since && is a logical expression and it expect a boolean argument. Consider putting a + b into (a + b)

      Delete
  23. static void A()
    {
    for(int i=0;i<=a.length-1;i++)
    {
    for(int j=0;j<=a.length-1;j++)
    {

    System.out.println("*");
    }
    System.out.println(" ");
    }
    }

    ReplyDelete
  24. class happy
    {int min;
    int max;
    happy()
    {
    int min;
    int max;}
    void getdetails(int a, int b)
    {int min = a;
    int max = b;
    }
    int square(int x)
    {int d =0,s = 0;
    while( x!= 0)
    {d = x%10;
    s =s+ d*d;
    x=x/10;}
    return s;

    }
    int sumsquaredigit(int x)
    {int b =square(x);
    int sum = sum+b;
    return sum;
    }
    boolean ishappy(int x)
    {int p=sumsquaredigit(x);
    if(p == 1)
    return true;
    else
    return false;
    }
    void printallhappy()
    {for(int i = min; i<= max; i++)
    {
    boolean l =ishappy(i);
    if (l == true)
    {
    System.out.println(i+"is happy number");
    }
    }
    void main(int a,int b)
    {
    happy ob = new happy();
    ob.printallhappy();
    }
    }
    }
    its showing illegal start of expression for void statement.

    ReplyDelete
  25. This comment has been removed by the author.

    ReplyDelete
  26. my url is too long, and I'm a beginner, I don't understand anything, is there any way you can help me? please

    ReplyDelete
    Replies
    1. What do yo mean by URL is too long, if you provide more detail may be we can help?

      Delete
    2. Okay. I wanted to install the game "minecraft" with Java, and I got the error illegal start of expression 7 or something like that, and as I am a beginner in this, I do not understand how to fix it ... I tried to put the url but it told me that it is too long ... is there any way you can help me by other means to place the url ??? I would appreciate it very much!

      Delete
  27. import java.util.Scanner;
    import java.io.*;
    public class People
    {
    public static void main (String[] args)
    {
    age = new int[10];
    int sum = new sum[0];
    double average = new average[0];
    Scanner scan = new Scanner (System.in);
    System.out.print("People1 berumur" + age[0]);
    age = scan.nextInt();
    System.out.print("People2 berumur" + age[1]);
    age = scan.nextInt();
    System.out.print("People3 berumur" + age[2]);
    age = scan.nextInt();
    System.out.print("People4 berumur" + age[3]);
    age = scan.nextInt();
    System.out.print("People5 berumur" + age[4]);
    age = scan.nextInt();
    System.out.print("People6 berumur" + age[5]);
    age = scan.nextInt();
    System.out.print("People7 berumur" + age[6]);
    age = scan.nextInt();
    System.out.print("People8 berumur" + age[7]);
    age = scan.nextInt();
    System.out.print("People9 berumur" + age[8]);
    age = scan.nextInt();
    System.out.print("People10 berumur" + age[9]);
    age = scan.nextInt();

    for( i = age; i<age.length; i++)
    {
    System.out.println( age[i] );
    }

    System.out.println(" The sum of age" + age[0] + age[1] + age[2] + age[3] + age[4] + age[5] + age[6] + age[7] + age[8] + age[9]);
    int sum = age[0]+age[1]+age[2]+age[3]+age[4]+age[5]+age[6]+age[7]+age[8]+age[9];
    sum = scan.nextInt();

    System.out.println("The average is" + average);
    double average = sum / 10;
    average = scan.nextDouble();
    }
    return 0;
    }

    ReplyDelete
  28. import java .util.*;
    class Student
    {
    public static void main(String args[])
    {
    Scanner sc =new Scanner(System.in);
    int age;
    String name;
    double m1,m2,m3,avg,max;
    {
    Name=name;
    Age=age;
    m1=x;
    m2=y;
    m3=z;
    }
    void accept()
    {
    Scanner sc=new Scanner (Syetem.in);
    System.out.println("Enter name,age,m1,m2,m3");
    name =sc.next();
    age =sc.nextInt();
    m1 =sc.nextDouble();
    m2 =sc.nextDouble();
    m3 =sc.nextDouble();
    }
    void compute()
    {
    if(m1>m2&&m1>m3)
    {
    max =m1;
    }
    else if(m2>m1&&m2>m3)
    {
    max =m2;
    }
    else
    {
    max=m3;
    }
    avg =(m1+m2+m3)
    }
    void display()
    {
    Sytem.out.println("Name ="+name);
    System.out.println("Age ="+age);
    System.out.println("m1 ="+m1);
    System.out.println("m2 ="+m2);
    System.out.println("m3 ="+m3);
    System.out.println("Max marks ="+max);
    System.out.println("Average ="+avg);
    }
    public static void main(String args[])
    {
    student ob =new student("Jack,10,45,43,49)
    ob.accept();
    ob.compute();
    ob.display();
    }
    }
    }
    what is the problem in this sum

    ReplyDelete
    Replies
    1. What is your objective? Anyway, your variables are local so you can't really access them outside the method they are declared, I mean main. Declare them outside main() method and try again.

      Delete
  29. hello can you help me it said that i have illegal start of expression
    double total=;
    ^
    1 error
    import java.io.*;
    public class Bufferedreader{
    public static void main(String[] args){

    BufferedReader dataIn = new BufferedReader( new
    InputStreamReader(System.in) );

    String yards = "25.5";
    System.out.print("Enter number of yards:");
    try{
    yards = dataIn.readLine();
    }catch( IOException e ){
    System.out.println("Error!");

    }
    String feet = "23";
    System.out.print("Enter number of feet:");
    try{
    feet = dataIn.readLine();
    }catch( IOException e ){
    System.out.println("Error!");
    }

    String inches = "12.7";
    System.out.print("Enter number of inches:");
    try{
    inches = dataIn.readLine();
    }catch( IOException e ){
    System.out.println("Error!");

    }

    double total=;
    System.out.print("");
    try{
    total = dataIn.readLine();
    }catch( IOException e ){
    System.out.println("Error!");

    }

    System.out.println("25.5 yards = " + yards);
    System.out.println("23 feet = " + feet);
    System.out.println("12.7inches = " + inches);
    Total_centimeters = ((yards *3 *12 *2.54) + (feet * 12 * 2.54) + inches * 2.54);
    System.out.println("The total centimeters is equal to " + total);


    }


    import java.io.*;
    public class Bufferedreader{
    public static void main(String[] args){

    BufferedReader dataIn = new BufferedReader( new
    InputStreamReader(System.in) );

    String yards = "25.5";
    System.out.print("Enter number of yards:");
    try{
    yards = dataIn.readLine();
    }catch( IOException e ){
    System.out.println("Error!");

    }
    String feet = "23";
    System.out.print("Enter number of feet:");
    try{
    feet = dataIn.readLine();
    }catch( IOException e ){
    System.out.println("Error!");
    }

    String inches = "12.7";
    System.out.print("Enter number of inches:");
    try{
    inches = dataIn.readLine();
    }catch( IOException e ){
    System.out.println("Error!");

    }

    double total=;
    System.out.print("");
    try{
    total = dataIn.readLine();
    }catch( IOException e ){
    System.out.println("Error!");

    }

    System.out.println("25.5 yards = " + yards);
    System.out.println("23 feet = " + feet);
    System.out.println("12.7inches = " + inches);
    Total_centimeters = ((yards *3 *12 *2.54) + (feet * 12 * 2.54) + inches * 2.54);
    System.out.println("The total centimeters is equal to " + total);


    }


    }

    ReplyDelete
  30. hello i have illegal start of expression please can you help how to fix it.
    double total=;
    ^
    1 error
    import java.io.*;
    public class Bufferedreader{
    public static void main(String[] args){

    BufferedReader dataIn = new BufferedReader( new
    InputStreamReader(System.in) );

    String yards = "25.5";
    System.out.print("Enter number of yards:");
    try{
    yards = dataIn.readLine();
    }catch( IOException e ){
    System.out.println("Error!");

    }
    String feet = "23";
    System.out.print("Enter number of feet:");
    try{
    feet = dataIn.readLine();
    }catch( IOException e ){
    System.out.println("Error!");
    }

    String inches = "12.7";
    System.out.print("Enter number of inches:");
    try{
    inches = dataIn.readLine();
    }catch( IOException e ){
    System.out.println("Error!");

    }

    double total=;
    System.out.print("");
    try{
    total = dataIn.readLine();
    }catch( IOException e ){
    System.out.println("Error!");

    }

    System.out.println("25.5 yards = " + yards);
    System.out.println("23 feet = " + feet);
    System.out.println("12.7inches = " + inches);
    Total_centimeters = ((yards *3 *12 *2.54) + (feet * 12 * 2.54) + inches * 2.54);
    System.out.println("The total centimeters is equal to " + total);


    }


    }

    ReplyDelete
    Replies
    1. remove double total=;
      ^
      1 error from top of the file and compile again.

      Delete
  31. public boolean getFull(ItemStack itemstack)
    {
    public boolean full = (itemstack.getOrCreateTag().getBoolean("isFull"));
    return full;
    }
    "Error: illegal start of expression"
    Public seems to be the problem but I have no idea why. Can you help me?

    ReplyDelete
  32. Is this code part of any class? In Java every thing must be part of the class, can you paste full code?

    ReplyDelete
  33. It's okay I fixed it. I had some more errors after doing so but I fixed those too.
    Thanks anyway!

    ReplyDelete
    Replies
    1. good to hear that you fixed the problem yourself.

      Delete
  34. Hi. Can you help me to fix my java? I'm using jdoodle.com . It said illegal start of expression .

    ReplyDelete
  35. Hello, can you help with this code?
    protected String numberInvalidMessage(int number) {return String ("Not positive: NUM");}
    }
    It says that its an "illegal start of expression".

    ReplyDelete
  36. Hi, can you help with his code, it returns the error, "illegal start of expression

    public class PositiveNumber extends NumberValidator {

    protected boolean numberValid(int number) { if (number > 0) {return true; }

    protected String numberInvalidMessage(int number) { if (number > 0) {return ("Not positive: NUM"); }
    }
    }

    ReplyDelete
  37. you don't need to put ("Not positive: NUM"), remove the bracket "Not positive: NUM" and it will be ok. In Java string is anything inside double quotes and you can directly return them, no need of bracket or parenthesis.

    ReplyDelete
  38. Hi, Your site is great but I'm not sure what I'm looking for. I can't figure this error out. Here is the code

    /*
    * To change this license header, choose License Headers in Project Properties.
    * To change this template file, choose Tools | Templates
    * and open the template in the editor.
    */
    package recipetest;
    /**
    *
    * @author 1580704_snhu
    */

    public class Milestone2_RecipeTest {
    public Milestone2_RecipeTest addNewRecipe(){
    public printRecipeTest();

    /**
    * @param args the command line arguments
    */

    public static void main(String[] args) {
    // TODO code application logic here

    final Milestone2_RecipeTest newRecipe = new Milestone2_RecipeTest(); //Constructor to Create new Recipe (calls other class)

    Milestone2_RecipeTest addNewRecipe = newRecipe.addNewRecipe(); //Invoke addNewRecipe()

    newRecipe.printRecipeTest(); //Access printReciope()

    }
    }

    Here is the error
    Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - missing return statement

    ReplyDelete
    Replies
    1. Code is incomplete, public Milestone2_RecipeTest addNewRecipe(){ --- all the code for this method is not present.

      Delete
  39. Hey can you guys help me out?

    This is the code:


    //import javax.swing.JFrame;
    //import java.awt.*;
    //import java.awt.event.*;
    //import javax.swing.*;

    public class PersonalSlideShowRunner extends JFrame
    {
    private static final int WIDTH = 1000;
    private static final int HEIGHT = 800;

    public PersonalSlideShowRunner()
    {
    super("Personal Slide Show");

    setSize(WIDTH,HEIGHT);

    getContentPane().add(new PersonalSlideShow());



    setVisible(true);

    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public static void main( String args[] )
    {
    PersonalSlideShowRunner run = new PersonalSlideShowRunner();
    }
    }


    And this is the error:

    PersonalSlideShowRunner.java:21: error: cannot find symbol
    getContentPane().add(new PersonalSlideShow());
    ^
    symbol: class PersonalSlideShow
    location: class PersonalSlideShowRunner
    1 error

    Thank you!

    ReplyDelete
  40. Even I need 1 help
    What is the mistake in
    System out.println(array P is);
    for(int i=0;<odd;I++)
    {
    System.out.println(P[i]+--);
    }

    ReplyDelete
  41. class MyClass {
    {
    static int add(int x ,int y)
    {
    while(y!=0)
    {
    int carry =x&y;
    x=x^y;
    }
    return x;
    }
    public static void main(String args[])
    {
    int a= 4;
    int b= 5;
    System.out.println("a+b is " + add (a,b));
    }
    }javac /tmp/faJtvS5Mqr/MyClass.java
    /tmp/faJtvS5Mqr/MyClass.java:3: error: illegal start of expression
    static int add(int x ,int y)
    ^
    1 error

    ReplyDelete
  42. //Employee.java
    public class Employee {
    {
    private String name;
    public Employee(String name)
    {
    this.name=name;
    }
    //Method to set name value
    public void setName(String name)
    {
    this.name=name;
    }
    //Method to get the name as return value
    public String getName()
    {
    return name;
    }

    }//end of the Employee

    ReplyDelete
  43. //Employee.java
    public class Employee {
    {
    private String name;
    public Employee(String name)
    {
    this.name=name;
    }
    //Method to set name value
    public void setName(String name)
    {
    this.name=name;
    }
    //Method to get the name as return value
    public String getName()
    {
    return name;
    }

    }//end of the Employee

    ReplyDelete
  44. Can i ask questions

    ReplyDelete
    Replies
    1. Yes, please go ahead, I will try to answer if I can

      Delete
  45. How can I get this java script off my phone and who installed it

    ReplyDelete
  46. Can you help me to know what's mistake in my code?

    package chatbot;

    import java.util.Scanner;

    public class main {

    public static void main(String[] args) {

    System.out.println("Welcome to the chatbot");
    while (true) {

    Scanner sc = new scanner (System.in);

    if (commands.equals ("Greet the prof")) {
    System.out.println("Hello Sir");
    }
    else if (commands.equals ("How's the task?")) {
    System.out.println("Honestly Sir, Its a bit difficult sir! especially if you don't have laptop");
    }
    else if (commands.equals ("So how did you make it?")) {
    System.out.println("I do more research, watched some vedios on how to do it");
    }
    else if (question.tostring[].contains ("How did you overcome those?")) {
    System.out.println("Stay calm, more patient, motivate my self and follow the step");
    }
    else if (commands.equals ("Goods to hear! exit!")) {
    System.exit(0);
    }
    }

    }

    }

    ReplyDelete
  47. You can just copy paste this code into any IDE or online Java compiler it can easily point out the place.

    Here is the error I got when I compiled the code:
    javac /tmp/BOfk32DEzG/main.java
    /tmp/BOfk32DEzG/main.java:20: error: class expected
    } else if (question.tostring[].contains("How did you overcome those?")) {
    ^
    /tmp/BOfk32DEzG/main.java:20: error: ')' expected
    } else if (question.tostring[].contains("How did you overcome those?")) {
    ^
    /tmp/BOfk32DEzG/main.java:20: error: ';' expected
    } else if (question.tostring[].contains("How did you overcome those?")) {
    ^
    /tmp/BOfk32DEzG/main.java:22: error: 'else' without 'if'
    } else if (commands.equals("Goods to hear! exit!")) {
    ^
    4 errors

    And when I looked at line 20, I found that there are two closing parentheses "))" that was the problem, just remove one parenthesis and it will work.

    ReplyDelete
  48. Hi I'm reading this I don't know how to interpret it to my problem , the code I have runs fine in eclipse, but when I run it in my college practice checker , it spits out the following error..
    Syntax Error(s)
    __tester__.java:4: error: illegal start of type
    import java.util.Scanner;
    ^
    __tester__.java:4: error: expected
    import java.util.Scanner;
    ^
    2 errors



    import java.util.Scanner;

    public class addTwo {

    public static void main(String[] args) {
    // TODO Auto-generated method stub

    Scanner s = new Scanner(System.in); // get info from user
    int a = 0, b = 0,c = 0;

    System.out.println("Enter number 1 :");
    a = s.nextInt(); // get whole number

    System.out.println("Enter number 2 :");
    b = s.nextInt(); // get whole number

    c = addition(a, b);

    System.out.println("The addition is " + c);
    }

    private static int addition(int x, int y) {
    int answer = 0;

    answer = x + y;

    return (answer);
    }

    }


    any help appreciated greatly (please note you have to cut package main; before entering into checker) thanks


    ReplyDelete
  49. any idea guys

    import java.util.Scanner;

    public class addTwo {

    public static void main(String[] args) {
    // TODO Auto-generated method stub

    Scanner s = new Scanner(System.in); // get info from user
    int a = 0, b = 0,c = 0;

    System.out.println("Enter number 1 :");
    a = s.nextInt(); // get whole number

    System.out.println("Enter number 2 :");
    b = s.nextInt(); // get whole number

    c = addition(a, b);

    System.out.println("The addition is " + c);
    }

    private static int addition(int x, int y) {
    int answer = 0;

    answer = x + y;

    return (answer);
    }

    }


    _tester__.java:3: error: illegal start of type
    import java.util.Scanner;
    ^
    __tester__.java:3: error: expected
    import java.util.Scanner;
    ^
    2 errors


    i have to remove main package to run on college practice tester

    ReplyDelete

Feel free to comment, ask questions if you have any doubt.