Question about programming with java: NoSuchMethodError?

Question

Hey guys, I really need help. I keep getting the error 'Exception in thread "main" java.lang.NoSuchMethodError: main' when I try to run my java programs. I write my code using TextPad and it always compiles successfully, but when I try to run the program, I get that error. I checked all my class names and all my syntax and everything is fine, but I keep getting the error. The odd thing is that SOMETIMES the programs are running successfully, then when you try to run it again, the error shows up! It's really frustrating and I can't find a solution in plain English which I can understand anywhere! Please, if aanyone can help me, I would really appreciate it. Don't know if any of this info helps: OS: Windows Vista, Text Editor: TextPad, and I'm using jdk1.6.0_12.

Update:

It would be a great help if you could give your answers with as much detail as you can so I can follow the instructions and figure out what to do. Thanks. :)

Germann A · Accepted Answer

As BOTH answers mentioned before:
the method is NOT available, this can be caused by compiling and running under (radically) different versions of Java, if you are sure that you compiled your program with 1.6, make sure that you are running it using compatible JVM, check your path AND classpath...

Erika · Answer

i did no longer examine by using all of the code, so there must be greater issues incorrect with this... yet in java, length of an array is a public quantity and not a manner. So s.length() is faulty it is going to be s.length The java compiler is cribbing appropriate to the lenth() approach no longer being attainable. i think of thats a false impression those with previous exposure to C++ convey to java.

wekar_ac · Answer

Thrown if an application tries to call a specified method of a class (either static or instance), and that class no longer has a definition of that method.

Normally, this error is caught by the compiler; this error can only occur at run time if the definition of a class has incompatibly changed.

You're likely calling a method that has been removed from your current JDK.

? · Answer

Why don't you try using an IDE like Eclipse or NetBeans....it would change u'r life :-) ! I know it's not the answer u were looking for but it's so much easy to find the problem.....NetBeans it's the easiest way to build an UI. Give it a try!

Fudge · Answer

Basically provide a main() method in ur class . A main() starts ur application by creating objects and calling their methods  ,regardless of how long ur code is 

Example : assume ur class is called Foo:
class Foo { //code 

public static void main(String[] args)
{
System.out.println("Foooo");
}

}

Anonymous · Answer

This post answers this question very well.

http://computerprogrammingacademy.com/javablog/2009/03/31/javalangnosuchmethoderror-main/

Read the post and I bet that is where you are going wrong.

Good luck

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Question about programming with java: NoSuchMethodError?

6 Answers