210110

/*

import javax.swing.*;

import java.awt.event.*;

import java.awt.*;

public class Main extends JFrame{

public Main(){

setTitle("Action 이벤트 리스너 예제");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container c = getContentPane();

c.setLayout(new FlowLayout());

JButton btn = new JButton("Action");

btn.addActionListener(new MyActionListener());

c.add(btn);

setSize(350, 150);

setVisible(true);

}

public static void main(String[] args) {

new Main();

}

}

class MyActionListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

JButton b = (JButton)e.getSource();

if(b.getText().equals("Action"))

b.setText("액션");

else

b.setText("Action");

}

}

*/

/*

import javax.swing.*;

import java.awt.event.*;

import java.awt.*;

public class Main extends JFrame{

public Main(){

setTitle("Action 이벤트 리스너 예제");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container c = getContentPane();

c.setLayout(new FlowLayout());

JButton btn = new JButton("Action");

btn.addActionListener(new MyActionListener());

c.add(btn);

setSize(350, 150);

setVisible(true);

}

private class MyActionListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

JButton b = (JButton)e.getSource();

if(b.getText().contentEquals("Action"))

b.setText("액션");

else

b.setText("Action");

Main.this.setTitle(b.getText());

}

}

public static void main(String[] args) {

new Main();

}

}

*/

/*

import javax.swing.*;

import java.awt.event.*;

import java.awt.*;

public class Main extends JFrame{

public Main(){

setTitle("Action 이벤트 리스너 예제");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container c = getContentPane();

c.setLayout(new FlowLayout());

JButton btn = new JButton("Action");

c.add(btn);

btn.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

JButton b = (JButton)e.getSource();

if(b.getText().equals("Action"))

b.setText("액션");

else

b.setText("Action");

setTitle(b.getText());

}

});

setSize(350, 150);

setVisible(true);

}

public static void main(String[] args) {

new Main();

}

}

*/

/*

import javax.swing.*;

import java.awt.event.*;

import java.awt.*;

public class Main extends JFrame{

private JLabel la = new JLabel("Hello");

public Main() {

setTitle("Mouse 이벤트 예제");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container c = getContentPane();

c.addMouseListener(new MyMouseListener());

c.setLayout(null);

la.setSize(50,20);

la.setLocation(30,30);

c.add(la);

setSize(250,250);

setVisible(true);

}

class MyMouseListener implements MouseListener{

public void mousePressed(MouseEvent e) {

int x = e.getX();

int y = e.getY();

la.setLocation(x,y);

}

public void mouseReleased(MouseEvent e) {}

public void mouseClicked(MouseEvent e) {}

public void mouseEntered(MouseEvent e) {}

public void mouseExited(MouseEvent e) {}

}

public static void main(String[] args) {

new Main();

}

}

*/

/*

import javax.swing.*;

import java.awt.event.*;

import java.awt.*;

public class Main extends JFrame{

private JLabel la = new JLabel("Hello");

public Main() {

setTitle("Mouse 이벤트 예제");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container c = getContentPane();

c.addMouseListener(new MyMouseAdapter());

c.setLayout(null);

la.setSize(50,50);

la.setLocation(30,30);

c.add(la);

setSize(250,250);

setVisible(true);

}

class MyMouseAdapter extends MouseAdapter{

public void mousePressed(MouseEvent e) {

int x = e.getX();

int y = e.getY();

la.setLocation(x,y);

}

}

public static void main(String[] args) {

new Main();

}

}

*/

/*

import javax.swing.*;

import java.awt.event.*;

import java.awt.*;

public class Main extends JFrame{

private JLabel [] keyMessage;

public Main() {

setTitle("keyMessage 예제");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container c = getContentPane();

c.setLayout(new FlowLayout());

c.addKeyListener(new MyKeyListener());

keyMessage = new JLabel [3];

keyMessage[0] = new JLabel(" getKeyCode() ");

keyMessage[1] = new JLabel(" getkeyChar() ");

keyMessage[2] = new JLabel(" getkeyText() ");

for(int i=0; i<keyMessage.length; i++) {

c.add(keyMessage[i]);

keyMessage[i].setOpaque(true);

keyMessage[i].setBackground(Color.YELLOW);

}

setSize(300, 150);

setVisible(true);

c.setFocusable(true);

c.requestFocus();

}

class MyKeyListener extends KeyAdapter{

public void keyPressed(KeyEvent e) {

int keyCode = e.getKeyCode();

char keyChar = e.getKeyChar();

keyMessage[0].setText(Integer.toString(keyCode));

keyMessage[1].setText(Character.toString(keyChar));

keyMessage[2].setText(KeyEvent.getKeyText(keyCode));

System.out.println("KeyPressed");

}

public void keyReleased(KeyEvent e) {

System.out.println("KeyReleased");

}

public void keyTyped(KeyEvent e) {

System.out.println("KeyTyped");

}

}

public static void main(String[] args) {

new Main();

}

}

*/

import javax.swing.*;

import java.awt.event.*;

import java.awt.*;

public class Main extends JFrame{

public JLabel la = new JLabel("Love Java");

public Main() {

setTitle("마우스 올리기 내리기");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container c = getContentPane();

c.setFocusable(true);

c.requestFocus();

c.setLayout(new FlowLayout());

c.addMouseListener(new MyMouseAdapter());

c.add(la);

setSize(300, 200);

setVisible(true);

}

class MyMouseAdapter extends MouseAdapter{

public void mouseEntered(MouseEvent e) {

la.setText("사랑해");

}

public void mouseExited(MouseEvent e) {

la.setText("Love Java");

}

}

public static void main(String[] args) {

new Main();

}

}