itemlistenerdemo.java

来自「java课程的资料以及实验的代码」· Java 代码 · 共 70 行

import java.awt.Frame;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.Choice;
import java.awt.Checkbox;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.Panel;


public class ItemListenerDemo extends Frame {
     Choice cho;
     Checkbox cb1;
     Checkbox cb2;
     public ItemListenerDemo()
     {
    	 cho=new Choice();
    	 cho.add("name");
    	 cho.add("gujin");
    	 cho.add("weiwei");
    	 cb1=new Checkbox("Male");
    	 cb2=new Checkbox("Female");
    	 this.add(cho,BorderLayout.CENTER);
    	 Panel p1=new Panel();
    	 p1.add(cb1);
    	 p1.add(cb2);
    	 Color cc=new Color(120,100,100);
    	 Font font=new Font("宋体",Font.BOLD,20);
    	 p1.setBackground(cc);
    	 cho.setForeground(Color.BLUE);
    	 cho.setFont(font);
    	 this.add(p1,BorderLayout.SOUTH);
    	 this.setSize(300,300);
    	 this.setVisible(true);
    	 cho.addItemListener(new ItemListener(){
    		 public void itemStateChanged(ItemEvent e) {
    				// TODO Auto-generated method stub
                 setTitle(cho.getSelectedItem());
    			}

    	 });
    	 cb1.addItemListener(new ItemListener(){
    		 public void itemStateChanged(ItemEvent e) {
    				// TODO Auto-generated method stub
                  setTitle(cb1.getLabel());
    			}

    	 });
    	 cb2.addItemListener(new ItemListener(){
    		 public void itemStateChanged(ItemEvent e) {
    				// TODO Auto-generated method stub
    			 setTitle(cb2.getLabel());
    			}

    	 });
     }
	

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new ItemListenerDemo();

	}

}