First Java Program

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

To compile and run java program open command prompt. Go to the location where the java file is saved. To complie type javac and name of java program. To run java program type java and name of file. In below picture "FirstJava" file is compiled and run by cmd prompt.