Java - Medium Articles

What is the difference between field, variable, attribute, and property in Java

Variable A variable is the name given to a memory location. It is the basic unit of storage in a program. The value stored in… Read More

java-basics

Technical Scripter 2018

Java

Technical Scripter

Differences between wait() and join() methods in Java

The wait() and join() methods are used to pause the current thread. The wait() is used in with notify() and notifyAll() methods, but join() is… Read More

Java-Multithreading

Technical Scripter 2018

Difference Between

Java

Technical Scripter

Oracle Certified Java Associate (OCA) Exam Preparation

Friends! I recently appeared for OCA exam and scored 95%. Here i am sharing few techniques and exam question patterns which must be helping you… Read More

Computer Science Quizzes

Java

Java Quiz

Java 9 Features with Examples

Java is a general-purpose, high-level programming language developed by Sun Microsystems. It is concurrent, class-based, object-oriented, and specifically designed to have as few implementation dependencies… Read More

Picked

Technical Scripter 2018

Java

Technical Scripter

How to check if a key exists in a HashMap in Java

Given a HashMap and a key in Java, the task is to check if this key exists in the HashMap or not. Examples: Input: HashMap:… Read More

Java-Collections

Java-HashMap

Java-Map-Programs

Java

How to sort HashSet in Java

Given a HashSet in Java, the task is to sort this HashSet. Examples: Input: HashSet: [Geeks, For, ForGeeks, GeeksforGeeks] Output: [For, ForGeeks, Geeks, GeeksforGeeks] Input:… Read More

Java-Collections

java-hashset

Java-Set-Programs

Java

How to convert LinkedList to Array in Java?

Given a Linked List in Java, the task is to convert this LinkedList to Array. Examples: Input: LinkedList: ['G', 'e', 'e', 'k', 's'] Output: Array:… Read More

Java-Array-Programs

Java-Arrays

Java-Collections

java-LinkedList

Java-List-Programs

Java

Find first and last element of ArrayList in java

Prerequisite: ArrayList in Java Given an ArrayList, the task is to get the first and last element of the ArrayList in Java, Examples: Input: ArrayList… Read More

Java-ArrayList

Java-Collections

Java-List-Programs

Technical Scripter 2018

Java

Technical Scripter

SortedMap values() method in Java with Examples

The values() method of SortedMap interface in Java is used to create a collection out of the values of the map. It basically returns a… Read More

Java - util package

Java-Collections

Java-Functions

Java-SortedMap

Java

HashTable putIfAbsent() method in Java with Examples

The putIfAbsent(Key, value) method of Hashtable class which allows to map a value to a given key if given key is not associated with a… Read More

java-basics

Java-Functions

Java-HashTable

Java

Flatten a Stream of Arrays in Java using forEach loop

Given a Stream of Arrays in Java, the task is to Flatten the Stream using forEach() method. Examples: Input: arr[][] = {{ 1, 2 },… Read More

Java

Flatten a Stream of Map in Java using forEach loop

Given a Stream of Map in Java, the task is to Flatten the Stream using forEach() method. Examples: Input: map = {1=[1, 2], 2=[3, 4,… Read More

Java

HashMap compute() method in Java with Examples

The compute(Key, BiFunction) method of HashMap class allows you to update a value in HashMap. The compute() method tries to compute a mapping for the… Read More

java-basics

Java-Functions

Java-HashMap

Java

Throwable printStackTrace() method in Java with Examples

printStackTrace() The printStackTrace() method of Java.lang.Throwable class used to print this Throwable along with other details like class name and line number where the exception… Read More

Java-Exception Handling

Java-Exceptions

Java-Functions

Java-lang package

java-Throwable

Java

IntUnaryOperator Interface in Java

The IntUnaryOperator Interface is a part of the java.util.function package which has been introduced since Java 8, to implement functional programming in Java. It represents… Read More

Java - util package

Java 8

java-basics

Java-Functional Programming

java-interfaces

Java

Convert a String to a List of Characters in Java

Given a String, the task is to convert it into a List of Characters in Java. Examples: Input: String = "Geeks" Output: [G, e, e,… Read More

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Technical Scripter 2018

Java

StringBuilder deleteCharAt() in Java with Examples

The deleteCharAt(int index) method of StringBuilder class remove the character at the given index from String contained by StringBuilder. This method takes index as a… Read More

java-basics

Java-Functions

Java-StringBuilder

Java

Program to Convert List to Map in Java

The List is a child interface of Collection. It is an ordered collection of objects in which duplicate values can be stored. Since List preserves… Read More

Java-Collections

java-list

Java-List-Programs

java-map

Java-Map-Programs

Technical Scripter 2018

Java

Technical Scripter

Scanner nextLine() method in Java with Examples

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… Read More

Java - util package

Java-Functions

Java-Library

Java

Scanner useDelimiter() method in Java with Examples

useDelimiter(Pattern pattern) The useDelimiter(Pattern pattern) method of java.util.Scanner class sets this scanner’s delimiting pattern to the specified pattern. Syntax: public Scanner useDelimiter(Pattern pattern) Parameter: The… Read More

Java - util package

Java-Library

Java