Java - First Program

 Java - First Program

Let us look at a simple code that will print the words Hello World.

Example

public class MyFirstJavaProgram

{

/* This is my first java program.

* This will print 'Hello World' as the output */

public static void main(String []args)

{

System.out.println("Hello World"); // prints Hello World

}

}

Let's look at how to save the file, compile, and run the program. Please follow the subsequent steps −

·   Open notepad and add the code as above.

·   Save the file as: MyFirstJavaProgram.java.

·   Open a command prompt window and go to the directory where you saved the class. Assume it's C:\.

·   Type 'javac MyFirstJavaProgram.java' and press enter to compile your code. If there are no errors in your code, the command prompt will take you to the next line (Assumption : The path variable is set).

·   Now, type ' java MyFirstJavaProgram ' to run your program.

·   You will be able to see ' Hello World ' printed on the window.

Output

·   C:\> javac MyFirstJavaProgram.java

·   C:\> java MyFirstJavaProgram

·   Hello World