Question

i have this code

public class watermark {

    public static void main(String[] args) {
        wmmain m = new wmmain();
        m.setSize(800, 500);
        m.setVisible(true);
    }

    class wmmain extends JFrame /* MAIN WINDOW */
    {
        JMenuBar jmb;
        // ......
    }
}

It works fine from the command prompt but when i try to run the code in eclipse it gives me the following error:

Exception in thread "main" java.lang.Error: Unresolved compilation problem: 
No enclosing instance of type watermark is accessible. Must qualify the allocation with an enclosing instance of type watermark (e.g. x.new A() where x is an instance of watermark).

at watermark.main(watermark.java:20)

What should i do??

Answer 1

From Documentation:

To instantiate an inner class, you must first instantiate the outer
class.

syntax:

OuterClass.InnerClass innerObject = outerObject.new InnerClass();

you need Outer class instance to create an instance of your Inner class.

wmmain m=new WaterMark().new wmmain();