Hi friend,

A Java Console application can only display textual data. Console applications resemble DOS based applications in that all interaction with the program is through keyboard and text output. The mouse, and any use of multiple windows is not supported.

Console applications are good for applications that have limited interaction with the user. If a program must run in the background, away from the user, a console application is an ideal choice. Console applications are also great for setting up quick tests to see how Java works. The applications you develop in this book will be console applications.

As for example.

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


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Read for more information,

http://www.roseindia.net/java/