exception in thread 'main' java.lang.NoClassDefFoundError:

Question

The following program is throwing error:

public class HelloWorld {
    public static void main(String args[]) {
        System.out.println(\"Hello World!\");         


        

Answer 1

Easy & Simple solution: I solved this problem (NetBeans) by exporting the original project into zip file, deleting the original project directory and importing the project back from the zip file.