radiobuttondemo.java

学习参考,java基本语法练习,包括一些常用的技巧

//单选按钮组件演示
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class RadioButtonDemo extends JFrame implements ItemListener
{
	JPanel pnlMain;
	JLabel lblInfo,lblSelect;
	JRadioButton rbtnFemale,rbtnMale;
	ButtonGroup grpGender;
	
	public RadioButtonDemo()
	{
		super("单选按钮演示");
		lblInfo=new JLabel("您选择的是:");
		lblSelect=new JLabel();
		lblSelect.setForeground(Color.BLUE);
		grpGender=new ButtonGroup();
		Icon icnFemale=new ImageIcon("female.jpg");
		rbtnFemale=new JRadioButton("女",icnFemale);
		grpGender.add(rbtnFemale);
		rbtnFemale.setSelected(true);
		rbtnFemale.addItemListener(this);
		Icon icnMale=new ImageIcon("male.jpg");
		rbtnMale=new JRadioButton("男",icnMale);
		grpGender.add(rbtnMale);
		rbtnMale.addItemListener(this);
		pnlMain=new JPanel(new GridLayout(2,2));
		pnlMain.add(rbtnFemale);
		pnlMain.add(rbtnMale);
		pnlMain.add(lblInfo);
		pnlMain.add(lblSelect);
		this.setContentPane(pnlMain);
		setSize(250,150);
		setVisible(true);
		this.addWindowListener(new WindowAdapter()
		{
			public void windowClosing(WindowEvent we)
			{
				System.exit(0);
			}
		});
	}
		public void itemStateChanged(ItemEvent evt)
		{
			if (evt.getSource()==rbtnFemale)	
				lblSelect.setText("女");
			if (evt.getSource()==rbtnMale)
				lblSelect.setText("男");
		}
		public static void main(String args[])
		{
			new RadioButtonDemo();
		}
}