Source Code : Bad Checkbox UI

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Bad Checkbox UI

  

import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Insets;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

import javax.swing.AbstractButton;
import javax.swing.ButtonModel;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.basic.BasicCheckBoxUI;

public class MyCheckBoxUI extends BasicCheckBoxUI implements
    java.io.Serializable, MouseListener {

  private final static MyCheckBoxUI buttonUI = new MyCheckBoxUI();


  public MyCheckBoxUI() {
  }

  public static ComponentUI createUI(JComponent c) {
    return buttonUI;
  }

  public void installUI(JComponent c) {
    super.installUI(c);
    c.setBackground(Color.red);
    c.addMouseListener(this);
  }

  public void uninstallUI(JComponent c) {
    super.uninstallUI(c);
    c.removeMouseListener(this);
  }

  public void paint(Graphics g, JComponent c) {
    AbstractButton b = (AbstractButton) c;
    ButtonModel model = b.getModel();
    Dimension d = b.getSize();

    g.setFont(c.getFont());
    FontMetrics fm = g.getFontMetrics();
    g.setColor(Color.white);
    g.drawString("Am I a check box", 10, 10);

  }

  public void mouseClicked(MouseEvent e) {
  }

  public void mousePressed(MouseEvent e) {
  }

  public void mouseReleased(MouseEvent e) {
  }

  public void mouseEntered(MouseEvent e) {
    JComponent c = (JComponent) e.getComponent();
    c.setBackground(Color.blue);
    c.repaint();
  }

  public void mouseExited(MouseEvent e) {
    JComponent c = (JComponent) e.getComponent();
    c.setBackground(Color.red);
    c.repaint();
  }
  public static void main(String[] argv) {
    JFrame f = new JFrame();
    f.setSize(400, 300);
    f.getContentPane().setLayout(new FlowLayout());

    JPanel p = new JPanel();
    JCheckBox bt1 = new JCheckBox("Click Me");
    bt1.setUI(new MyCheckBoxUI());
    p.add(bt1);
    f.getContentPane().add(p);
    WindowListener wndCloser = new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    };
    f.addWindowListener(wndCloser);
    f.setVisible(true);
  }

}


           
         
    
  

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