Go to Start -> All Programs -> Accessories -> Notepad as shown in the following figure and click on Notepad to launch the program.
Figure 1: Launching Notepad in Windows.
Figure 2: Typing JAVA code in Notepad.
To save the file as a JAVA program, you need to save it with the extension .java
To change that, in the Save as Type box (the highlighted area in figure 3), select All Files.
Then, provide the file name (example.htm in figure 3) in the File name box.
Remember the file name MUST end in .java
It is recommended that you save your program in your own directory (without any space in its name) in H drive.
Figure 3: Saving the file as a JAVA document.
Go to Start -> Command Prompt (highlighted in figure 4).
Figure 4: Opening Command Prompt in Windows.
Use cd to go to the directory where the JAVA program is saved in.
Use dir to see the files in the directory.
When you are in the desired directory, you can compile the program by javac [filename.java].
After the file is compiled, you can run it by java filename
Figure 5: Compiling and Running the JAVA program.