Suppose you have a comma-separated list of String e.g. "Samsung, Apple, Sony, Google, Microsoft, Amazon" and you want to convert ...

creating and initializing List at the same time Sometimes we want to create and initialize a List like ArrayList or LinkedList in one ...

Hello guys, if you want to learn ArrayList in-depth and looking for a complete guide on ArrayList then you have come to the right place. Ear...

Hello guys, if you have a List of numbers and you want to shuff it but don't know how then you have come to the right place. Shuffling ...

You can use the set() method of java.util.ArrayList class to replace an existing element of ArrayList in Java. The set(int index, E eleme...

You can use the size() method of java.util.ArrayList to find the length or size of ArrayList in Java. The size() method returns an integ...

There are two ways to remove all elements of an ArrayList in Java, either by using clear() or by using the  removeAll() method.  Both met...

Hello guys,  Java, as a versatile and widely used programming language, offers a plethora of data structures to developers. One of them is L...

How to convert a List to Set in Java Many times we need to convert one collection to another like converting a List to a Set . It's a...

Difference between ArrayList and HashMap in Java One of the most critical differences between the HashMap and ArrayList class is that the ...

Sometimes you want to create an ArrayList with values , just like you initialize t at the time of declaration, as shown below: int[] prim...

There is no easy way to convert an array to a list in Java , but you can easily convert a list into an array by calling the  toArray() met...

There are times when you need to get the first or last element of an ArrayList. One of the common scenarios where you need the first and la...

What is the difference between a CopyOnWriteArrayList and a Synchronized ArrayList is one of the popular Java interview questions, particula...

Hello guys, if you are preparing for Java interviews then you have come to the right place. In the past, I have shared 130+ Java interviews ...

ArrayList is a very useful Collection in Java, I guess most used one as well but it is not synchronized. What this mean? It means you canno...

You can reverse ArrayList in Java by using the reverse() method of java.util.Collections class. This is one of the many utility methods p...

ArrayList is the most popular implementation of the List interface from Java's Collection framework, but it allows duplicates. Though t...

ArrayList, Set Sorting in Ascending – Descending Order Java Sorting List, Set, and ArrayList in Java in ascending and descending order i...

Hello guys, if you have a list of object and you want to conver into Map of object or key value pair then you can use different ways like lo...