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///////////////////////////////////////////////////////////
// 文件名:
// JavaApplication2.java
///////////////////////////////////////////////////////////
// 简介:
// 简单的Java程序,通过点击按钮显示或隐藏窗口
///////////////////////////////////////////////////////////
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class JavaApplication2 {
static JFrame window1 = new JFrame("第一个窗口");
static JFrame window2 = new JFrame("第二个窗口");
public static void main(String [] args) {
Container window1_con = window1.getContentPane();
window1.setBounds(60,100,300,150);
window1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window1.setVisible(true);
Container window2_con = window2.getContentPane();
window2.setBounds(260,100,300,150);
window2.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
window2.setVisible(false);
JButton btn1 = new JButton("打开第二个窗口");
window1_con.add(btn1);
// window1.pack();
JButton btn2 = new JButton("关闭此窗口");
window2_con.add(btn2);
// window2.pack();
ActionListener listener1;
listener1 = new ReaderListen1();
btn1.addActionListener(listener1);
ActionListener listener2;
listener2 = new ReaderListen2();
btn2.addActionListener(listener2);
}
}
class ReaderListen1 extends JavaApplication2 implements ActionListener {
public void actionPerformed(ActionEvent e) {
window2.setVisible(true);
}
}
class ReaderListen2 extends JavaApplication2 implements ActionListener {
public void actionPerformed(ActionEvent e) {
window2.setVisible(false);
}
}
import javax.swing.AbstractButton;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.ImageIcon;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
/*
* ButtonDemo.java requires the following files:
* images/right.gif
* images/middle.gif
* images/left.gif
*/
public class ButtonDemo extends JPanel
implements ActionListener {
protected JButton b1, b2, b3;
public ButtonDemo() {
ImageIcon leftButtonIcon = createImageIcon("images/right.gif");
ImageIcon middleButtonIcon = createImageIcon("images/middle.gif");
ImageIcon rightButtonIcon = createImageIcon("images/left.gif");
b1 = new JButton("Disable middle button", leftButtonIcon);
b1.setVerticalTextPosition(AbstractButton.CENTER);
b1.setHorizontalTextPosition(AbstractButton.LEADING); //aka LEFT, for left-to-right locales
b1.setMnemonic(KeyEvent.VK_D);
b1.setActionCommand("disable");
b2 = new JButton("Middle button", middleButtonIcon);
b2.setVerticalTextPosition(AbstractButton.BOTTOM);
b2.setHorizontalTextPosition(AbstractButton.CENTER);
b2.setMnemonic(KeyEvent.VK_M);
b3 = new JButton("Enable middle button", rightButtonIcon);
//Use the default text position of CENTER, TRAILING (RIGHT).
b3.setMnemonic(KeyEvent.VK_E);
b3.setActionCommand("enable");
b3.setEnabled(false);
//Listen for actions on buttons 1 and 3.
b1.addActionListener(this);
b3.addActionListener(this);
b1.setToolTipText("Click this button to disable the middle button.");
b2.setToolTipText("This middle button does nothing when you click it.");
b3.setToolTipText("Click this button to enable the middle button.");
//Add Components to this container, using the default FlowLayout.
add(b1);
add(b2);
add(b3);
}
public void actionPerformed(ActionEvent e) {
if ("disable".equals(e.getActionCommand())) {
b2.setEnabled(false);
b1.setEnabled(false);
b3.setEnabled(true);
} else {
b2.setEnabled(true);
b1.setEnabled(true);
b3.setEnabled(false);
}
}
/** Returns an ImageIcon, or null if the path was invalid. */
protected static ImageIcon createImageIcon(String path) {
java.net.URL imgURL = ButtonDemo.class.getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL);
} else {
System.err.println("Couldn't find file: " + path);
return null;
}
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
*/
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("ButtonDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
ButtonDemo newContentPane = new ButtonDemo();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}