Java——復選框：JCheckBox

 

import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;

//=================================================
// File Name       :	JCheckBox_demo
//------------------------------------------------------------------------------
// Author          :	Common



// 類名：JCheckBox
// 屬性：
// 方法：
class MyCheckBox implements ItemListener{
	private JFrame frame = new JFrame("窗體");
	private Container cont = frame.getContentPane();
	private JCheckBox jrb1  = new JCheckBox("單選1");
	private JCheckBox jrb2  = new JCheckBox("單選2"); 
	private JCheckBox jrb3  = new JCheckBox("單選3"); 
	private JPanel pan = new JPanel();
	public MyCheckBox(){
		//定義一個面板的邊框顯示條
		pan.setBorder(BorderFactory.createTitledBorder("請選擇按鈕"));
		pan.setLayout(new GridLayout(1,3));

		pan.add(this.jrb1);
		pan.add(this.jrb2);
		pan.add(this.jrb3);
		
		jrb1.addItemListener(this); 			//加入事件監聽
		jrb2.addItemListener(this); 			//加入事件監聽
		jrb3.addItemListener(this); 			//加入事件監聽
		
		cont.add(pan);
		this.frame.setSize(330,80);
		this.frame.setVisible(true);
		this.frame.addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e) {			//窗口關閉時觸發，按下關閉按鈕
			// TODO 自動生成的方法存根
			System.out.println("windowClosing-->窗口關閉");
			System.exit(1);
			}
		});
	}
	@Override
	public void itemStateChanged(ItemEvent e) {
		// TODO 自動生成的方法存根
		if(jrb1.isSelected()){
			System.out.println("jrb1");
		}
		if(jrb2.isSelected()){
			System.out.println("jrb2");
		}
		if(jrb3.isSelected()){
			System.out.println("jrb3");
		}
	}
}




//主類
//Function        : 	JCheckBox_demo
public class JCheckBox_demo {

	public static void main(String[] args) {
		// TODO 自動生成的方法存根
		new MyCheckBox();
	}

}