How to compile and run java program at command console

hi there
can anyone tell me how to compile and run a java program at command console? I have installed JRE 1.3.1, and also have installed JBuilder 5 if it helps.

try this
System.out.println("Enter your Name : ");
BufferedReader console = new BufferedReader( new InputStreamReader( System.in ) );
String s = console.readLine();
System.out.println("Hello : "+ s+" !" );

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