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J2

Show Course Contents Overview Q&A Downloads Announcements Basic Structure of a Java Program: Understanding our First Java Hello World Program Basic Structure of a Java Program package com.company; // Groups classes public class Main{ // Entrypoint into the application  public static void main(String[]args){   System.out.println(“Hello World”);  } } Working of the "Hello World" program shown above : package com.company : Packages are used to group the related classes. The "Package" keyword is used to create packages in Java. Here, com.company is the name of our package. public class Main : In Java, every program must contain a class. The filename and name of the class should be the same. Here, we've created a class named "Main". It is the entry point to the application. public static void main(String[]args){..} : This is the main() method of our Java program. Every Java program must contain the main() method. System.out.println("Hello World...

J1

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</>  CodeWithHarry Menu Logout Show Course Contents Overview Q&A Downloads Announcements Introduction to Java + Installing Java JDK and IntelliJ IDEA for Java Java is one of the most popular programming languages because it is used in various tech fields like app development, web development, client-server applications, etc. Java is an object-oriented programming language developed by Sun Microsystems of the USA in 1991. It was originally called Oak by James Goslin. He was one of the inventors of Java. Java = Purely Object-Oriented. How Java Works? The source code in Java is first compiled into the bytecode. Then the Java Virtual Machine(JVM) compiles the bytecode to the machine code. Java Installation: Step 1:  Downloading JDK  JDK stands for Java Development Kit. It contains Java Virtual Machine(JVM) and Java Runtime Environment(JRE). JDK –  Java Development Kit = Collection of tools used for developing and running java programs. JRE –  Java Run...