GeeksforGeeks

LinkedHashSet contains() Method in Java with Examples

Last Updated: 18 November 2021

In Java, LinkedHashSet class contains methods known as contains() which is used to return true if this set contains the specified element otherwise false.Syntax:public boo...read more

LinkedHashSet clear() method in Java with Examples

Last Updated: 12 October 2018

The clear() method of java.util.LinkedHashSet class is used to remove all of the elements from this set. The set will be empty after this call returns.Syntax:public void c...read more

ArrayList ensureCapacity() Method in Java with Examples

Last Updated: 10 December 2024

In Java, the ArrayList.ensureCapacity() method is used to increase the internal capacity of an ArrayList to ensure that it can hold a specified minimum number of elements....read more

Scanner nextLong() method in Java with Examples

Last Updated: 12 October 2018

The nextLong(radix) method of java.util.Scanner class scans the next token of the input as a long. If the translation is successful, the scanner advances past the input th...read more

Scanner nextInt() method in Java with Examples

Last Updated: 12 October 2018

The nextInt(radix) method of java.util.Scanner class scans the next token of the input as a Int. If the translation is successful, the scanner advances past the input that...read more

Scanner nextByte() method in Java with Examples

Last Updated: 12 October 2018

The nextByte(radix) method of java.util.Scanner class scans the next token of the input as a Byte. If the translation is successful, the scanner advances past the input th...read more

Scanner nextBigInteger() method in Java with Examples

Last Updated: 12 October 2018

The nextBigInteger(radix) method of java.util.Scanner class scans the next token of the input as a BigInteger. If the translation is successful, the scanner advances past ...read more

Scanner nextDouble() method in Java with Examples

Last Updated: 12 October 2018

The nextDouble() method of java.util.Scanner class scans the next token of the input as a Double. If the translation is successful, the scanner advances past the input tha...read more

Scanner nextBoolean() method in Java with Examples

Last Updated: 12 October 2018

The nextBoolean() method of java.util.Scanner class scans the next token of the input as a Boolean. If the translation is successful, the scanner advances past the input t...read more

Scanner nextBigDecimal() method in Java with Examples

Last Updated: 12 October 2018

The nextBigDecimal() method of java.util.Scanner class scans the next token of the input as a BigDecimal. If the next token matches the Decimal regular expression defined ...read more

Scanner nextLine() method in Java with Examples

Last Updated: 12 October 2018

The nextLine() method of java.util.Scanner class advances this scanner past the current line and returns the input that was skipped. This function prints the rest of the c...read more

Scanner locale() method in Java with Examples

Last Updated: 12 October 2018

The locale() method of java.util.Scanner class returns this scanner's locale.Syntax: public Locale locale()Parameters: The function does not accepts any parameter.Return V...read more

Which Java libraries are useful for competitive programming?

Last Updated: 10 May 2022

Java is one of the most recommended languages in competitive programming (please refer a previous article for more details)Java Collection framework contains lots of conta...read more

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Java

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Java-Competitive-Programming

Java Exercises - Basic to Advanced Java Practice Programs with Solutions

Last Updated: 02 January 2025

Looking for Java exercises to test your Java skills, then explore our topic-wise Java practice exercises? Here you will get 25 plus practice problems that help to upscale...read more

Java

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How to Copy Key-Value Pairs from One TreeMap to Another in Java?

Last Updated: 06 February 2024

In Java, a TreeMap is a Map implementation that stores key-value pairs in a red-black tree structure. It allows insertions and deletions of key-value pairs due to its tree...read more