What is the name of the inner class?

import javax.swing.*;
import java.awt.*;
//class
public class MP3ManagerTest{
	//mian
	public static void main(String [] args){
		
		MP3Manager manager = new MP3Manager();
		manager.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		manager.setSize(650,650);
		manager.setVisible(true);
	}
}

and where is the inner class?

Read through the thread! It is this class.

import javax.swing.*;
    import java.awt.*;
    //class
    public class MP3ManagerTest{
    //mian
    public static void main(String [] args){
    //inner class
    SwingUtilities.invokeLater(new Runnable(){
    public void run(){
    //instance manager
    MP3Manager manager = new MP3Manager();
    manager.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    manager.setSize(new Dimension(400,400));
    manager.setVisible(true);
           }
        });
       }
    }

Why didn't you post that when I asked for it?
I went to the link you gave, did a Find for MP3ManagerTest and copied the code here.
Now you say that I got the wrong one.

Why do you have the inner class in your code? Why not use the code I posted earlier?

Where did you get that code?

This inner-classed MP3ManagerTest class is at the fourth reply on that thread, it is right above you said "

in the test program, I should not use that inner class to run it. And how am I suppose to do that?

Please explain.

"

Forget it. If you want help, you can make it easier by answering questions with full and complete answers.

Good luck with your project.

That is fine with me since you have very little interest to contribute help in the first place.

Have a good day.

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