Java GUI Need some help with the GUI this is what I have package labCoin; public

Question

Java GUI

Need some help with the GUI this is what I have

package labCoin;

public class CoinApp{
   public static void main(String[] args){
       for(Coin el : Coin.values()){
           System.out.printf("%s ", el);
       }
   }
}

______________________________________

package labCoin;

public enum Coin {
   CENT(2.500, 19.05), NICKLE(5.0, 21.21), DIME(2.268, 17.91), QUARTER(5.670, 24.26);
  
   private final double weight;
   private final double diameter;
  
   private Coin(double weightValue, double diameterValue){
       weight = weightValue;
       diameter = diameterValue;
   }
  
   @Override
   public String toString(){
       String coinName = super.toString();
       return String.format("%s w:%.1f d:%.1f",coinName, weight, diameter);
   }

}

___________________________________

package labCoin;
import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.Frame;
import java.awt.SystemColor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.SwingConstants;
import javax.swing.border.CompoundBorder;
import javax.swing.border.EmptyBorder;
import javax.swing.border.TitledBorder;

public class CoinGUI {
   public CoinGUI() {
   initialize();
   }
   private void initialize() {
       frame = new JFrame();
       frame.setBounds(100, 100, 498, 300);
       frame.setDefaultCloseOpertion(JFrame.EXIT_ON_CLOSE);
      
       JPanel coinPanel = new JPanel();
       coinPanel.setBackground(SystemColor.menu);
       frame.getContentPane().add(coinPanel, BorderLayout.NORTH);
      
       pennyBtn = new JRadioButton("");
       penny.setIcon(new ImageIcon(this.getClass().getResource("UsCent.png")));
       pennyBtn.addActionListener(new btnClickEvent());
       coinPanel.add(pennyBtn);
      
       nickelBtn = new JRadioButton("");
       nickel.setIcon(new ImageIcon(this.getClass().getResource("UsNickel.png")));
       nickelBtn.addActionListener(new btnClickEvent());
       coinPanel.add(nickelBtn);
      
       dimeBtn = new JRadioButton("");
       dime.setIcon(new ImageIcon(this.getClass().getResource("UsDime.png")));
       dimeBtn.addActionListener(new btnClickEvent());
       coinPanel.add(dimeBtn);
      
       quarterBtn = new JRadioButton("");
       quarter.setIcon(new ImageIcon(this.getClass().getResource("UsQuarter.png")));
       quarterBtn.addActionListener(new btnClickEvent());
       coinPanel.add(quarterBtn);
      
       coinInfo = new JLabel("Click a Coin");
       coinInfo.setFont(new Font("SimSun", Font.PLAIN, 32));
       coininfo.setHorizontalAlignment(SwingConstants.CENTER);
       frame.getContentPane().add(coinInfo, BorderLayout.CENTER);
      
       ButtonGroup coinGroup = new ButtonGroup();
       coinGroup.add(pennyBtn);
       coinGroup.add(nickelBtn);
       coinGroup.add(dimeBtn);
       coinGroup.add(quarterBtn);
       }
   private class btnClickEvent implements ActionListener{
      
       @Override
       public void actionPreformed(ActionEvent e){
          
           if(pennyBtn.isSelected())
               coinInfo.setText(Coin.CENT.toString());
          
           if(nickelBtn.isSelected())
               coinInfo.setText(Coin.NICKEL.toString());
          
           if(dimeBtn.isSelected())
               coinInfo.setText(Coin.DIME.toString());
          
           if(quarterBtn.isSelected())
               coinInfo.setText(Coin.QUARTER.toString());
          
          
          
       }
   }
}

Explanation / Answer

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import java.text.NumberFormat;

public class CoinPanel extends JPanel{

private JButton buttons[] = new JButton[9];

private JLabel multiplySign[] = new JLabel[9];

private JLabel coinCount[] = new JLabel[9];

String [] names= {"1c", "2c", "5c", "10c", "20c", "50c", "

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