I have inserted a javaapplet code in html tag at the time of execution it was showing the error as no class def found an dis notshowing the output can any one one help to overcome this error.
To help you, we will need to know a lot more details. The error means that Java cannot find a Java class file to load.
What is the exact error message (copy and paste it here)? Which class is it that Java cannot find?
What does your HTML look like? Do you have the applet in a JAR file? Does the JAR file contain all the necessary classes, or is something maybe missing?