Time Series is a mathematical concept that consists of data points indexed
according to a timed order. A Time-Series can also be defined as a sequence of
events taken at successive equally spaced points in time. In Time Series
Analysis, we analyze a sequence of data points collected over an interval of
time. You should be able to record data points at consistent intervals over a
set period. This is different from just recording data points at random
intervals. A Time Series Analysis can show how different variables change over time. It
provides an additional source of information and a set order of dependencies
between the data. Time Series data can also be used for forecasting and
predicting future data based on historical data.
3 ways to check if a String contains SubString in Java? IndexOf, contains, and lastIndexOf Example
You have given a String and a subString or a character and you need to find out whether given String contains the given character or substring, how would you do that? Well, there are three main ways to search String in Java, the contains() method, the indexOf() method and the lastIndexOf() method, all from java.lang.String class. First method, contains() accepts a CharSequence, superclass of String and return true if that CharSequence appear on the String you have called. The indexOf() and lastIndexOf() are similar method and both return the index (zero based) from where the given subString or character appear in the String you have called. Only difference between indexOf() and lastIndexOf() is that if given substring appear multiple time then they will return difference index, otherwise both will return the same index. Similarly if given sub-string is not present in the String, both will return -1 and contains() will return false.
How to make Immutable class in Java? Mutable vs Immutable Objects
How I make immutable objects in Java? I've always thought that all objects are immutable, because if you change the content of an String example, it will always create you an new String object and point to that. However later I found that String is a special class and its specially designed as an Immutable class because its often cached. Obviously you cannot cache anything which is not constant and that make sense why String is Immutable in Java. But this encouraged me to learn more about Mutable and Immutable class in Java and how to create a custom Immutable class in Java.
Difference between StringTokenizer and Split method in Java? Example
There are multiple ways to split a String in Java, but two of the most common ways are by using StringTokenizer and the split method of String class. You can use either one of them, but when to use which one? This short article will give you some details about StringTokenizer and Split method in Java to decide which one to use.
1) The StringTokenizer is legacy, Prefer split() as more chances of its performance getting improved as happens in Java 7.
2) The StringTokenizer doesn't support regular expression, while spilt() does. However, you need to be careful, because every time you call split, it creates a new Pattern object and compiles expression into a pattern. This means if you are using the same pattern with different input, then consider using Pattern.split() method, because compiling a pattern takes more time later to check whether a given string matches a pattern or not.
1) The StringTokenizer is legacy, Prefer split() as more chances of its performance getting improved as happens in Java 7.
2) The StringTokenizer doesn't support regular expression, while spilt() does. However, you need to be careful, because every time you call split, it creates a new Pattern object and compiles expression into a pattern. This means if you are using the same pattern with different input, then consider using Pattern.split() method, because compiling a pattern takes more time later to check whether a given string matches a pattern or not.
5 ways to Compare String Objects in Java - Example Tutorial
here are many ways to compare String in Java e.g. you can use equals() and equalsIgnoreCase() for equality check and compare() and compareTo() for ordering comparison. You can even use the equality operator == to perform reference-based comparison e.g. to check both the String reference variable points to the same object. In general, equals() is used to check whether the value of a given String is the same i.e. they contain the same characters in the same sequence or not e.g. "Groovy".equals("Groovy") will be true if you compare them using equals() method. You can also use equalsIgnoreCase() to check if they are equal irrespective of case e.g. "Apple" and "apple" will be the same if you compare them using equalsIgnoreCase() method.
Top 5 Courses For SAT Test in 2025 - Best of Lot
Hello guys, if you are preparing for SAT test and looking for best online courses for SAT then you have come to the right place. In this article, I am going to share best SAT online courses. But, Before we get to the 5 best courses that will help you pass the SAT exam with flying colors, let me tell you a little bit more about what this exam really is.
SAT, also known as the Scholastic Aptitude Test, is basically an entrance exam that is conducted by the college board. You have to give this exam if you want to pursue undergraduate studies in the United States of America.
5 Best Courses for SAT Test in 2025
The SAT is actually a multiple-choice exam that is conducted over the paper and pencil method. The registration for SAT will be processed almost 5 weeks before the actual exam. You will need to pay almost $109 in SAT exam fees.
The College Board conducts SAT 7 times a year. This may vary depending on your region.
SAT is made up of two key sections: evidence-based reading and writing, math, and a writing section that is optional. You will need to answer 154 questions in 3 hours. The SAT score is widely used for gaining admission to undergraduate programs abroad.
1. The Complete SAT Course [Udemy]
In
this fantastic course, you will learn about all the core features of
different mathematical equations and the SAT exam. You will also become
very good at different math principles. You will be able to master SAT
by the end of this course.
This amazing course will also help you polish your skills for the SAT.
Course Duration: 2 hours
Course Rating: 4.6 stars
Course Instructor: Robert Hubbard
Course Price: $25
2. The New SAT Video Series [Udemy]
This
is a great course that will help you take your skills in logical
reasoning to another level. You will be able to do this by making use of
things like marathon questions. The course will teach you how to
increase your skills for clearing the SAT.
This course will
act as a great brief introduction to the amazing world of SAT. It is
perfect for beginners as you will learn about the exam from absolute
scratch. You will learn exactly what it is and what you can do with it.
Course Duration: 2 hours
Course Rating: 4.4 stars out of 5
Course Instructor: Jesse Patrick
Course Price: $25
This
is an exciting course that will teach you everything you need to know
about the basics of the SAT in the shortest time possible. The course
will also teach you everything you need to know about the different
questions that you will see in the exam.
In this course, you
will learn about all the core features of the SAT. You will be able to
master almost all the subjects in the exam syllabus.
Course Duration: 1 hour
Course Rating: 4.6 stars out of 5
Course Instructor: Phillip Lee
Course Price: $25
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4. How To Get A Perfect SAT Score [Udemy]
This
course will act as a great brief introduction to the amazing world of
the SAT. It is perfect for beginners as you will learn about the exam
from absolute scratch. You will learn exactly what it is and why you
should attempt it. The course will also teach you everything you need to
know about the core features of the SAT exam.
Using this
exciting course, you will be able to learn the fundamentals of SAT from a
current student who cleared the same exam. You will also be able to
start your amazing journey by making use of this fantastic course.
Course Duration: 2 hours
Course Rating: 4.5 stars out of 5
Course Instructor: PrepExpert
Course Price: $20
This
is a fantastic course that will teach you everything you need to know
about the SAT along with the different types of questions you will face
from absolute scratch. In this way, it is absolutely perfect for
complete beginners.
In this wonderful course, you will also
learn everything you need to know about the different components of the
MCAT exam. You will start the course by learning about the basics of
psychological reasoning. Then you will move on to understand what
exactly is the MCAT exam.
Course Duration: 3 hours
Course Rating: 4.6 stars out of 5
Course Instructor: Mourad Kattan
Course Price: $20
Frequently Asked Questions
1. What is the SAT?
SAT,
also known as the Scholastic Aptitude Test, is basically an entrance
exam that is conducted by the college board. You have to give this exam
if you want to pursue undergraduate studies in the United States of
America.
2. Is SAT multiple-choice?
The
SAT is actually a multiple-choice exam that is conducted over the paper
and pencil method. The registration for SAT will be processed almost 5
weeks before the actual exam. You will need to pay almost $109 in SAT
exam fees. The College Board conducts SAT 7 times a year. This may vary
depending on your region.
3. What is the syllabus for SAT?
SAT
is made up of two key sections: evidence-based reading and writing,
math, and a writing section that is optional. You will need to answer
154 questions in 3 hours. The SAT score is widely used for gaining
admission to undergraduate programs abroad.
Conclusion
If
you liked this list of the 5 best courses to learn about the SAT, feel
free to share it with your friends and family. I have no doubt that the
courses in this list will transform you from a complete beginner to an
SAT expert within a matter of weeks or months. There are a wide variety
of courses in this list that will be beneficial to both absolute
beginners as well as intermediate-level learners.
You can also drop a comment if you have any doubts about the SAT, and we will get back to you as soon as possible.
4 ways to read String from File in Java - Example
Just like there are many ways for writing String to text file, there are multiple ways to read String form File in Java. You can use FileReader, BufferedReader, Scanner, and FileInputStream to read text from file. One thing to keep in mind is character encoding. You must use correct character encoding to read text file in Java, failing to do so will result in logically incorrect value, where you don't see any exception but content you have read is completely different than file's original content. Many of the method which is used to read String by default uses platform's default character encoding but they do have overloaded version which accepts character encoding.
How to download a file using HTTP in Java? Example
Hello guys, if you are looking for tutorial to understand about how to download a file using http in Java to have deep knowledge of java basics then you will definitely learn from this article. uploading and downloading files are common task but many Java developer are not aware about how to complete that. They don't know about HTTP and how to send and receive data using HTTP. Many of them also doesn't know about HttpClient which was added in JDK 11 as well as third party libraries like Apache HttpClient which you can use before JDK 11. Anyway, don't worry, we are again here with new article that is on download file using http will give all basics about the topic to our viewers or readers. Let's start with an example first.
How to read CSV file in Java without using a third-party library? FileReader Example Tutorial
Hello guys, as you learn Java, one thing that comes up early and often is reading from/ writing to files, and doing something useful with that data. This is also one thing which you will keep doing and also forgetting very soon, if you are not then you have good memory as I always forget it and then I do google search to find my own articles. If you read this blog then you know that in the past, I have shared how to load CSV file using OpenCSV library as well how to load a CSV file with header using Jackson but a lot of you asked me how to do this without using any third party library like Jackson or OpenCSV. So, I thought to write about this article and I actually written but forgot to publish it for a long time. But I today I found it and publishing it now, it still works well.
How to write to a File with try-with-resource in Java? Example Tutorial
Hello Java programmers and all people learning Java, if you are familiar with try-wit-resource statement then you know that its a great language functionality and tool to open files, sockets, streams, and network connections or any resource which are require closing. Before try-with-resource was introduce in Java 7, Java developers have to manually write try catch finally block to close the connections for both success and failure cases to prevent resource leak but it was also tricky and many programmer make mistakes which actually resulted in resource leaks. One common example of that is running out of file descriptors which is used for both opening file and socket in Java.
How to recursive copy directory in Java with sub-directories and files? Example
Hello guys, it's a common requirement in Java to copy a whole directory with sub-directories and files but it's not that straightforward, especially not until Java 7. JDK 7 introduced some new file utility methods as part of Java NIO 2 which we will use in this article to show you how to recursively copy a whole directory with sub-directories and files in Java. I'll also show you how you can use Apache Commons if you are not running on Java 7 or higher versions. Basically, You can copy a file or directory by using the copy(Path, Path, CopyOption...) method. The copy fails if the target file exists unless the REPLACE_EXISTING option is specified.
How to check if a File exists in Java with Example
Hello guys, if you are working in Java for a couple of years, then you have come across a scenario where you need to check if a file exists or not. This is often required while writing defensive code that writes or reads from a file. While there is a method to check if a file exists in Java or not, it's not straightforward to use because it returns true if a given path represents a file or a directory. Yes, I am talking about the File. Exists () method of the java.io package. This method is the key method to solve this problem, but you need to keep in mind that it returns true if a given path exists and it's either file or directory.
How to append text to file in Java? Example Tutorial
Hello guys, In this article, I'll teach you how to append text to a file in Java. Earlier, I have taught you guys how to create a file and write text into it, but, append is totally different than creating a new file and writing data into it. In the case of append, the file already exists and you just add text at the end of the file. One popular example of appending text into a file is a log file that is constantly updated because your application continuously appends log details into it. While you don't need to create a logging framework here, just knowing how to append text into an existing file in Java is useful for Java programmers of all kinds of experience.
How to work with Files and Directories in Java? Example Tutorial
The File API is one of the important parts of any programming language or API and even though Java's file API both new and old, is powerful, they are not intuitive enough compared to other languages like Python. Apart from knowing the essential classes and abstractions e.g. File, InputStream, OutputStream, Reader, Writer, Channel, etc, you also need to know and remember some nitty-gritty detail to avoid subtle issues. There are many articles out there on the internet which can teach you how to read and write data from the file but there are very few which will tell you to do it in the right way.
Top 5 Courses For LSAT (Law) Test in 2025 - Best of Lot
Hello guys, if you want to learn about LSAT exam and looking for best online courses to prepare for LSAT then you have come to the right place. In this article, I am going to share best LSAT online courses. But, before we get to the 5 best courses that will teach you everything you need to know about the LSAT exam, let me tell you a little bit more bout what it really is.
The LSAT, also known as the Law School Admission Test, is basically an entrance exam that is required to get admission into most law schools. It is made up of a number of multiple-choice questions and is regularly conducted by the Law School Admission Council.
6 Best Websites to learn Web Development in 2025
Hello guys, if you want to learn about web development and looking for best web development online then you have come to the right place. In this article, I am going to share best web development online courses. But, before learning about the best websites and courses to start web-development, its imperative to know and understand what web-development is. Web-development is usually defined as developing a website to be published on internet(world wide web or www) or intranet(private network).
Where to Start Learning to Code in 2025? Resources
Hello guys, if you want to coding and looking for best online courses to learn to code then you have come to the right place. In this article, I am going to share best coding and programming online courses. Coding, computers, programming, and IT has been a buzzword all through the world for last 10-15 years. In the same durations, we have seen several tech companies touch a milestone of a couple of trillion dollars in market cap. Everyday, in different parts of the world, we see new companies and organizations growing at unprecedented pace.
Top 5 Python Courses with Certificates for 2025 - Best of Lot
Hello guys, if you want to learn about Python programming and looking for best online courses to learn Python then you have come to the right place. In this article, I am going to share best Python programming online courses. But, before we get to the 5 best courses that will teach you everything you need to know about Python, let me tell you a bit more about what Python really is.
In simple terms, Python is basically a high-level, interactive, and object-oriented programming language. It is a scripting language that is designed to be highly readable. It is made up of frequently-used English words and also has fewer syntactical constructions than other languages.
Top 10 UX Design Courses for 2025 - Best of Lot
Hello guys, if you want to learn about UI and UX design and looking for best online courses to learn UI and UX then you have come to the right place. In this article, I am going to share best online courses for UI and UX developer. But, before we get into the top 10 UX design courses that will teach you everything you want to know about UX, let me tell you a bit more about what UX really is.
In basic terms, UX stands for user experience. It is used to describe the quality of the experience that an end user encounters with a certain product. It can also be related to a service, company, or even a brand.
How to escape HTML Special characters in JSP and Java? Example
Escaping HTML special characters in JSP or Java is a common task for Java programmers. There are many ways to escape HTML metacharacters in Java, some of which we have already seen in the last article escaping XML metacharacters in Java. For those who are not familiar with HTML special characters, there are five e.g. <, >, &, ' and '' and if you want to print them literally just like here, Than you need to escape those characters so < becomes <, > becomes > and so on.
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