When you have problems with applets or are simply in the stage of developing them, it's useful to be able to see what they're doing. You can inspect them through the Java Applet Console. Here's how to show it in Windows:

Enable the Java Console

First way

  1. Click Start
  2. Select Settings
  3. Select Control Panel
  4. Double click the Java icon
  5. Click the Advance tab
  6. Click on the  sign
  7. Select Show Console and click Apply
 console 1
Second way 
  1. Use the Java icon in the System Tray on lower right hand side of screen
  2. Right click on Java icon
  3. Select Open Console
 console 2