Start a MS-DOS command window.For PCs running Windows NT
choose Start/Programs/Command Prompt from the Windows NT desktop.For PCs running Windows 95,
choose Start/Shut Down/Restart in MS-DOS Mode from the Windows 95 desktop.Now, change to the directory of your choice from within the command window.
Create some Java source code with Notepad from within the command window.
For example, suppose we want a class named "A",
then we would start Notepad with the name of the Java file:
The source code, A.java, might look like this: