Language Basics

Create your first Java program

Let's start by compiling and running the following short sample program.
________________

/*
This is a simple Java program. Call this file "progname.java".
*/

public class progname {
// Your program begins with a call to main().
public static void main(String args[]) {
System.out.println("Java.");
}
}

Code:

/*
 This is a simple Java program. Call this file "progname.java".
 */

public class progname {
  // Your program begins with a call to main().
  public static void main(String args[]) {
    System.out.println("Java.");
      }
}

In Java, a source file is called a compilation unit. It is a text file that contains one or more class definitions. The Java compiler requires that a source file use the .java filename extension.

In Java, all code must reside inside a class. By convention, the name of the public class should match the its file name. And Java is case-sensitive.

To compile: [You must be registered and logged in to see this link.]