The Java 8 release of Java Programming language was a game-changer version. It not only provided some useful methods but totally changed t...

Hello guys, I have been writing about some important methods from Java SE 8  like  map() , flatMap() , collect() , etc for quite some time, ...

One of the common tasks in Java is to convert a List of objects, like a  List<T> into a Map, I mean  Map<K, V> , where K is so...

The map is a well-known functional programming concept that is incorporated into Java 8. Map is a function defined in java.util.stream.Str...

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 ...

Java Object Sorting Example How do you sort a list of Objects in Java is one of the frequently asked coding questions in Java interviews...

ArrayList vs Vector in Java ArrayList and Vector are the two most widely used Collection classes in Java and are used to store objects in ...

find an index of the object in Array While programming in Java, many times we need to check if a String array contains a particular Str...

Hello friends, I am really glad to see you all again here. And I know you are here to learn new and valuable Java concepts and continue your...

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, the Comparator class is used to provide code or logic for comparing objects in Java, while sorting a list of objects or a collec...

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 ...

HashSet and HashMap in Java Hello friends, if you have given Java developer interview then there is good chance that you may have come acro...

Hello Java programmers, sorting ArrayList in Java is not difficult; there are multiple ways to sort a given ArrayList in Java. For example y...

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...

ArrayList vs HashSet Java The main difference between ArrayList and HashSet is that one is a List implementation while the other is ...

Hello guys, today I am going to share another interesting question from Java interview, what is difference between Queue and Deque in Java. ...

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...