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import java.awt.*;

import javax.swing.*;

import java.awt.event.*;

class TestCheckBoxAction implements ItemListener{

JPanel panel;

JCheckBox checkbox1;

JCheckBox checkbox2;

JPanel panel1;

ButtonGroup buttongroup;

JRadioButton radiobutton1;

JRadioButton radiobutton2;

public static void main(String[] args) {

TestCheckBoxAction myframe=new TestCheckBoxAction();

}

TestCheckBoxAction()

{

JFrame frame =new JFrame("TestCheckBoxAction");

Container contentPane=frame.getContentPane();

checkbox1=new JCheckBox("backGround");

checkbox2=new JCheckBox("foreGround");

panel=new JPanel();

panel.setBackground(Color.black);//

panel.add(checkbox1);

panel.add(checkbox2);

panel1=new JPanel();

radiobutton1=new JRadioButton("foreGround");

radiobutton2=new JRadioButton("backGround");

buttongroup=new ButtonGroup();

panel1.setForeground(Color.red);

panel1.setBackground(Color.red);

buttongroup.add(radiobutton1);

buttongroup.add(radiobutton2);

panel1.add(radiobutton1);

panel1.add(radiobutton2);

contentPane.add(panel,BorderLayout.NORTH);

contentPane.add(panel1,BorderLayout.SOUTH);

checkbox1.addItemListener(this);

checkbox2.addItemListener(this);

radiobutton1.addItemListener(this);

radiobutton2.addItemListener(this);

frame.setSize(300,300);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.show();

}

public void itemStateChanged(ItemEvent e)//覆蓋此方法

{

Color defaultBackGround,defaultForeGround;

if(e.getSource()==checkbox1)

{

if(e.getStateChange()==ItemEvent.SELECTED)

{

defaultBackGround=Color.red;

}

else

defaultBackGround=Color.white;

panel.setBackground(defaultBackGround);

}

if(e.getSource()==checkbox2)

{

if(e.getStateChange()==ItemEvent.SELECTED)

defaultForeGround=Color.black;

else

defaultForeGround=Color.blue;

panel.setForeground(defaultForeGround);

}

if(e.getSource()==radiobutton1)

{

if(e.getStateChange()==ItemEvent.SELECTED)

{

defaultBackGround=Color.blue;

}

else

defaultBackGround=Color.red;

panel1.setBackground(defaultBackGround);

}

if(e.getSource()==radiobutton2)

{

if(e.getStateChange()==ItemEvent.SELECTED)

{

defaultForeGround=Color.black;

}

else

defaultForeGround=Color.BLUE;

panel.setForeground(defaultForeGround);

}

}

}

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