awt를 이용한 버튼만들기 및 이벤트

package awt;

import java.awt.*;
import java.awt.event.*;

public class CardTest2 extends Frame implements ActionListener, ItemListener
{

 @Override
 public void itemStateChanged(ItemEvent e)
 {
  int idx=ch.getSelectedIndex();
  String item=ch.getSelectedItem();
  this.setTitle(idx+1+"번째 있는"+item+" 선택");
  
 }

 

 Button btn1,btn2,btn3;
 
 CardLayout card=new CardLayout();
 Panel pCenter=new Panel();
 
 Panel p1,p2,p3;
 Label label1,label2,label3;
 
 Choice ch; //스크롤 다운 박스
 
 public CardTest2(String title)
 {
  super(title);
  this.addWindowListener(new WindowAdapter()
  {
   @Override
   public void windowClosing(WindowEvent e)
   {
    System.exit(0);
   }   
  });
  this.setDesign();
  this.setLocation(300, 100);
  this.setSize(300, 300);
  this.setVisible(true);
 }

 public void setDesign()
 {
  Panel pTop=new Panel();
  pTop.setBackground(Color.pink);
  btn1=new Button("card1");
  btn2=new Button("card2");
  btn3=new Button("card3");
  btn1.addActionListener(this);
  btn2.addActionListener(this);
  btn3.addActionListener(this);
  pTop.add(btn1);
  pTop.add(btn2);
  pTop.add(btn3);
  this.add("North",pTop);
  
  
  pCenter.setLayout(card);
  
  p1=new Panel();
  label1=new Label("==== Card 1 =====");
  label1.setForeground(Color.red);
  label1.setFont(new Font("Impact",Font.BOLD,20));
  p1.add(label1);
  
  
  p2=new Panel();
  label2=new Label("==== Card 2 =====");
  label2.setForeground(Color.green);
  label2.setFont(new Font("맑은고딕코딩",Font.BOLD,20));
  p2.add(label2);
  
  p3=new Panel();
  label3=new Label("==== Card 3 =====");
  label3.setForeground(Color.pink);
  label3.setFont(new Font("Arial",Font.BOLD,20));
  p3.add(label3);
  
  pCenter.add("one", p1);
  pCenter.add("two", p2);
  pCenter.add("three", p3);
  card.show(pCenter, "one");
  
  this.add("Center",pCenter); 
  
  
  Panel pBottom=new Panel();
  pBottom.setBackground(Color.yellow);
  ch=new Choice();
  ch.addItemListener(this);
  ch.add("red");
  ch.add("green");
  ch.add("blue");
  ch.add("white");
  ch.add("yellow");
  
  pBottom.add(new Label("좋아하는 색은?"));
  pBottom.add(ch);
  this.add("South",pBottom);  
  
  setBackground(Color.darkGray);
 }
 
 @Override
 public void actionPerformed(ActionEvent e) {
  // TODO Auto-generated method stub
  Object ob=e.getSource();
  if(ob==btn1)
   card.show(pCenter, "one");
  else if(ob==btn2)
   card.show(pCenter, "two");
  else
   card.show(pCenter, "three");
 }

 

 public static void main(String[] args) {
  // TODO Auto-generated method stub
  new CardTest2("카드 레이아웃 문제");
 }

}