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package com.sist.inter;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
//다중상속
public class MainClass2 extends JFrame implements ActionListener,MouseListener,ItemListener{
JButton b1;
JTextField tf;
JLabel la;
JComboBox box;
//초기화=> 메모리에 저장(생성자)
public MainClass2() {
b1=new JButton("클릭");
tf=new JTextField();
la=new JLabel(new ImageIcon("c:\\javaDev\\rocket.png"));
box=new JComboBox();
box.addItem("이정후");
box.addItem("김하성");
box.addItem("박병호");
//JFrame => BorderLayout
add("West",b1);
add("Center",la);
add("South",tf);
add("North",box);
//East까지 5개 방향에 배치가능
//화면크기
setSize(600, 650);
setVisible(true);
//이벤트 등록
//=>b1 클릭: actionPerformed() 호출
b1.addActionListener(this);//this:자신(MainClass2)
tf.addActionListener(this);//다른 클래스에서 불러오면=>new ~
la.addMouseListener(this);
box.addItemListener(this);
}
public static void main(String[] args){
new MainClass2();
}
@Override
public void mouseClicked(MouseEvent e){
if(e.getSource()==la) {
if(e.getClickCount()==2) { //더블클릭
JOptionPane.showMessageDialog(this, "상세보기로 이동");
}
}
}
@Override
public void mousePressed(MouseEvent e){
}
@Override
public void mouseReleased(MouseEvent e){
// TODO Auto-generated method stub
}
@Override
public void mouseEntered(MouseEvent e){
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent e){
// TODO Auto-generated method stub
}
@Override
public void actionPerformed(ActionEvent e){
if(e.getSource()==b1) {
JOptionPane.showMessageDialog(this, "버튼 클릭!!!");
//this:내 윈도우 위에 띄워달라 (null 주면 윈도우창 밖에 뜸)
}
else if(e.getSource()==tf) {
String msg=tf.getText();
JOptionPane.showMessageDialog(this, msg);
//텍스트창에 입력하고 Enter치면 그 메세지를 띄워라=>채팅
}
}
@Override
public void itemStateChanged(ItemEvent e){
if(e.getSource()==box) {
String name=(String)box.getSelectedItem();
//Object 형변환 필요
JOptionPane.showMessageDialog(this, name);
}
}
}
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cs |
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