Swing计算按钮点击次数 代码

计算按钮点击次数

package swing;

import javax.swing.*; //引入Swing包名

//import com.sun.java.swing.*;

//使用JDK 1.2 Beta 4版和所有Swing 1.1 Beta 3

//之前的版本,引入Swing包名用此方法。

import java.awt.*;

import java.awt.event.*;

public class SwingAppTest {

private static String labelPrefix = "Number of button clicks: ";

private int numClicks = 0; //计数器，计算点击次数

public Component createComponents() {

final JLabel label = new JLabel(labelPrefix + "0 ");

JButton button = new JButton("I'm a Swing button!");

button.setMnemonic(KeyEvent.VK_I); //设置按钮的热键为'I'

button.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

numClicks++;

label.setText(labelPrefix + numClicks);

//显示按钮被点击的次数

}

//http://comic.duowan.com/viewchapter-cid-54-chapterid-1391-15.html

});

label.setLabelFor(button);

/* 在顶层容器及其内容之间放置空间的常用办法是把内容添加到Jpanel上，而Jpanel本身没有边框的。*/

JPanel pane = new JPanel();

pane.setBorder(BorderFactory.createEmptyBorder(

30, //top

30, //left

10, //bottom

30) //right

);

pane.setLayout(new GridLayout(0, 1)); //单列多行

pane.add(button);

pane.add(label);

return pane;

}

public static void main(String[] args) {

try {

UIManager.setLookAndFeel(

UIManager.getCrossPlatformLookAndFeelClassName());

//设置窗口风格

} catch (Exception e) { }

//创建顶层容器并添加内容.

JFrame frame = new JFrame("SwingApplication");

SwingAppTest app = new SwingAppTest();

Component contents = app.createComponents();

frame.getContentPane().add(contents, BorderLayout.CENTER);

//窗口设置结束，开始显示

frame.addWindowListener(new WindowAdapter() {

//匿名类用于注册监听器

public void windowClosing(WindowEvent e) {

System.exit(0);

}

});

frame.pack();

frame.setVisible(true);

}

}