Logo
×

Java Tutorial

What is Java?

Java is an object-oriented, robust, secured and platform-independent programming language. With the help of Java Programming, we can develop console, window, web, enterprise and mobile applications.

Java language was developed in 1995 by James Gosling who is known as the father of Java. The first version of Java released on 23rd January, 1996.

There are three editions of Java: Java SE (Java Standard Edition), Java EE (Java Enterprise Edition), and Java ME (Java Micro Edition).

Java Hello World Example

File: HelloWorldJava.java

class Solution
{
public static void main(String[] args)
{
System.out.println("Hello World Test!");
}
}

Output:

Hello World!

Compile By:

javac HelloWorldJava.java

Run By:

java HelloWorldJava

Java Tutorial Index

Java Loops

Java Programs

Java Sorting

Java OOPs Concepts

Java Strings

Java Exceptions

Garbage Collection

Multithreading

Java IO

Serialization

Networking

AWT

Swing

Java Collections

Java Generics

Java Annotations

Java JDBC

Java Differences

How to

Java 8 Features

Java 9 Features

Java 12

Java 13

Java 14

Java 15

Java 16

Java 17

Java Math Methods

Java String Methods

Java Conversion

Java Keywords

Java Problems

Java Questions

Java Interview Questions

Misc

Related Topics

Getting the Day from the Date in Java?

To extract the day's name from the date, we will write Java application. When dealing the date and time in Java, the following classes are used. Class for Calendars: This class is...

6 minutes read.

Java Try Keyword

The try block in Java is used to run essential code, such as connection closure, among other things. Whether an exception is resolved or not, the Java try block has...

3 minutes read.

Java String equalsIgnoreCase() method

equalsIgnoreCase() method compares two Strings based on the their content but ignore the case. Syntax public boolean equalsIgnoreCase(Objects anObject) Parameter anObject: Object to be compared with the current String without case consideration. Returns It returns true...

1 minute read.

Streams in Java

The conventional Java SE 8 version came with many new peculiarities, out of which the most striking of which are assuredly lambda expressions and the method references. Streams and Streams...

14 minutes read.

Even Odd Program in Java

Even Odd Program in Java The number that are completely divisible by 2 are even and the number that leaves remainder are odd numbers. For example, the numbers 2, 0, 4,...

5 minutes read.

Java Swings

Swing is a Java Foundation Class library and an extension to the Abstract Window Toolkit (AWT) (JFC).As compared to AWT, Swing has significantly better functionality, new components, increased component features,...

9 minutes read.

Compare time in java

Introduction: This article discusses how to compare time in java. Maximum of the time we need to examine the date and datetime items. Date comparisons are vital if you want to...

3 minutes read.

Java Speech Recognition

The customer experience and convenience are improved with its utilization. Command and control interest in buying and voice synthesizers are supported by the cross-platform API defined by the API. For...

4 minutes read.

Java Heap Space Out of Memory Error

This error is called an "out of memory" error, which indicates that the JVM cannot allocate an object in memory from the heap. Hence the java.lang.out of memory error, describing...

2 minutes read.

How to Convert int to long in Java

How to Convert int to long in Java When two variables of different types are involved in the single expression, Java compiler uses built-in library function to convert the variable to...

2 minutes read.

Convert Integer to Roman Numerals in Java

The main objective of this article is to convert the integers that are decimal values to the roman numbers. Problem statement: Write a software/program/code to convert any integer to a roman number. You...

10 minutes read.

URLConnection Class

What is the URL? URL stands for Uniform Resource Locator, is used to specify addresses on the World Wide Web. A URL relates to the identification of any resource connected to the web. URL syntax: Protocol://hostname/other_information(files...

6 minutes read.

Java SHA256

Definition: In cryptography, SHA is a hash function that takes 20 bytes of input and produces an approximate 40-digit hexadecimal integer as the hash result. Class for Message Digest: Java's MessageDigest Class,...

2 minutes read.

Java Generics Questions

Introduction We'll walk through a few real-world examples of interview questions and responses for Java generics in this article. Java 5 saw the debut of the fundamental idea of generics. Due to...

9 minutes read.

Sphenic Number in Java

In this section, we will learn what is a sphenic number is and show you how to write Java programmes to determine if a specific number are sphenic or not....

3 minutes read.

String Matches in Java

Firstly we have to know something about String? Strings are a bundle of different characters that are normally used in Java programming language. Strings are regarded as objects in the Java...

3 minutes read.

Java Thread Dump Analyzer

Thread: A thread is a PC program that is stacked into the PC's memory and is under execution. It tends to be executed by a processor or a bunch of processors....

15 minutes read.

Split String into String Array in Java

The String split() technique returns a variety of divided strings after the strategy parts the given String around matches of a given normal articulation containing the delimiters. The ordinary articulation...

4 minutes read.

Switch Case with Enum in Java

From some conditions, the java switch statement executes one statement. Similar to the If-Else-If ladder statement, this can be Byte, short, int, long, enum, string, and some wrapper types like...

4 minutes read.

Knapsack problem in Java

We have a collection of items in the knapsack problem. Every object has a weight and a value. These things should go in a knapsack. But there is a weight...

3 minutes read.