First program in java

This is the first program in Java, In this program we will print "Hello World" message on the screen.

First program in java

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import java.lang.*;  //optional   class j1 {         public static void main(String args[])         {                 System.out.println("Hello world!");         } }

    Complie  : javac j1.java
    Run  : java j1
    Output
    Hello world!