CODEWITHSUNDEEP
javaswingjframe
Junejo
Junejo

Reputation: 747

JFrame: No process

I am learning java GUI with swing library. I know how to make a JFrame and add JButton, add ActionListener e.t.c but today JFrame is not showing. I am doing everything as usual. Please have a look at my code and suggest where am I doing wrong..

import javax.swing.*;
import java.awt.*;
import java.util.concurrent.TimeUnit;

public class MyGroup extends JFrame {

    private ButtonGroup myGroup = new ButtonGroup();

    public MyGroup(){
        setSize(500, 500);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        setLayout(new FlowLayout());

        JRadioButton b1 = new JRadioButton("check1");
        JRadioButton b2 = new JRadioButton("check2");
        JRadioButton b3 = new JRadioButton("check3");
        JRadioButton b4 = new JRadioButton("check4");

        add(b1);
        add(b2);
        add(b3);
        add(b4);

        myGroup.add(b1);
        myGroup.add(b2);
        myGroup.add(b3);
        myGroup.add(b4);

        setVisible(true);

    }

   public static void main(String[] args) throws Exception{
        ButtonGroup m = new ButtonGroup();
    }
}

Upvotes: 0

Views: 74

Answers (3)

Aniket Thakur
Aniket Thakur

Reputation: 68935

You need to add your ButtonGroup myGroup to your frame.

//your code
getContentPane().add(myGroup);
setVisible(true);

Also in your main method you need to create your JFrame object and not ButtonGroup.

MyGroup myFrame = new MyGroup();

Upvotes: 0

Scientious
Scientious

Reputation: 337

You did a simple typo in the main method. Instead of calling the ButtonGroup myGroup, consider changing it to calling the object MyGroup like this: 

     public static void main(String[] args) throws Exception{

       MyGroup group = new MyGroup();

   }

Upvotes: 2

Michael Berry
Michael Berry

Reputation: 72284

You're creating a new ButtonGroup in your main method, not a new MyGroup. I would imagine that since the latter executes your constructor and makes your frame visible, that's where your mistake lies!

Upvotes: 3

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