Java - util package

1.5k+ posts

Last Updated: 16 April 2025

TheJava.util.Listis a child interface ofCollection. It is an ordered collection of objects where duplicate values can be stored. Since List ...read more

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Java - util package

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HashMap get() Method in Java

Last Updated: 04 January 2025

The java.util.HashMap.get() method of HashMap class is used to retrieve or fetch the value mapped by a particular key mentioned in the param ...read more

Stream map() in Java with examples

Last Updated: 04 January 2025

Stream map(Function mapper)returns a stream consisting of the results of applying the given function to the elements of this stream.Stream m ...read more

Java-Stream interface

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HashMap in Java

Last Updated: 07 March 2025

In Java, HashMap is part of the Java Collections Framework and is found in the java.util package. It provides the basic implementation of th...read more

ArrayList to Array Conversion in Java : toArray() Methods

Last Updated: 04 January 2025

Following methods can be used for converting ArrayList to Array:Method 1: Using Object[] toArray() methodSyntax: public Object[] toArray() I...read more

Map Interface in Java

Last Updated: 23 April 2025

In Java, the Map Interface is part of thejava.utilpackage and represents a mapping between a key and a value. The Java Map interface is not ...read more

Last Updated: 08 April 2025

The List Interface in Java extends the Collection Interface and is a part of the java.util package. It is used to store the ordered collecti...read more

Last Updated: 12 March 2025

Java ArrayList is a part of the collections framework and it is a class of java.util package. It provides us with dynamic-sized arrays in Ja...read more

Last Updated: 09 April 2025

Stream was introduced in Java 8, the Stream API is used to process collections of objects. A stream in Java is a sequence of objects that su...read more

Last Updated: 07 April 2025

The Arrays class in java.util package is a part of the Java Collection Framework. This class provides static methods to dynamically create a ...read more

PriorityQueue in Java

Last Updated: 15 April 2025

The PriorityQueue class in Java is part of the java.util package. It implements a priority heap-based queue that processes elements based on...read more

Last Updated: 12 March 2025

HashSet in Java implements the Set interface of Collections Framework. It is used to store the unique elements and it doesn't maintain any s...read more

Last Updated: 08 April 2025

The Set Interface is present in java.util package and extends the Collection interface. It is an unordered collection of objects in which du...read more

Last Updated: 03 January 2025

Linked List is a part of the Collection framework present in java.util package. This class is an implementation of the LinkedList data struc...read more

Last Updated: 15 April 2025

The Java Collection framework provides a Stack class, which implements a Stack data structure. The class is based on the basic principle of ...read more

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