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Error Message

Shae Weathers

Joined: Jun 26, 2010
Posts: 8
Whenever I try to run my program, I keep getting the same message : Exception in thread "main" java.lang.NoSuchMethodError: main
What does this mean or what am I doing wrong?
Ernest Friedman-Hill
author and iconoclast

Joined: Jul 08, 2003
Posts: 24183


Every Java application nominally needs a method named "main" that takes an array of Strings as its single argument, is declared public static, and returns void:

This is the method the JVM calls when the application starts up. When you start your program with "java ClassName", the class ClassName has to be the one that contains your method "main()".

Does that help?

[Jess in Action][AskingGoodQuestions]
Shae Weathers

Joined: Jun 26, 2010
Posts: 8
I totally had a memory lapse..I was working on an applet and was trying to run it in the command prompt. I finally realized what I was doing wrong.
Campbell Ritchie

Joined: Oct 13, 2005
Posts: 38107
For applets you usually use the appletviewer instruction, or something like that, at the command line, don't you?
Enrique Gonzalez Moore

Joined: Jun 12, 2010
Posts: 7
You should create an html document with an applet tag. Something similar to this:

It is sorta covered in the JavaRanch Style Guide.
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