swingapplication.java

来自「主要是对于JAVA的编程的基本语言 希望能够帮得上你。」· Java 代码 · 共 60 行

package swing;

import javax.swing.*;

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

public class SwingApplication {

	private static String labelPrefix="Number of button clicks: ";
	private int numClicks=0; //计数器，计算点击次数
	
	public Component createComponent(){
		
		final JLabel label=new JLabel(labelPrefix+" 0 ");
		JButton button=new JButton("I am a Swing button.");
		button.setMnemonic(KeyEvent.VK_I);
		
		button.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent arg0) {
				numClicks++;
				label.setText(labelPrefix+numClicks); //显示按钮被点击的次数				
			}			
		});
		label.setLabelFor(button); //设置将标签添加到的组件
		
		JPanel panel=new JPanel();
		panel.setBorder(BorderFactory.createEmptyBorder(30,10,30,10));
		panel.setLayout(new GridLayout(0,1)); //单行多列
		panel.add(button);
		panel.add(label);
		
		return panel;		
	}
	
	public static void main(String[] args) {
		try {
			//设置窗口风格
			UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());			
		} catch (ClassNotFoundException e) {			
			e.printStackTrace();
		} catch (InstantiationException e) {			
			e.printStackTrace();
		} catch (IllegalAccessException e) {			
			e.printStackTrace();
		} catch (UnsupportedLookAndFeelException e) {			
			e.printStackTrace();
		}
		
		JFrame frame=new JFrame("SwingApplication");
		SwingApplication app=new SwingApplication();
		Component contents=app.createComponent();
		//frame.setContentPane((Container) contents); //设置内容面板
		frame.getContentPane().add(contents, BorderLayout.CENTER);
		frame.pack();
		frame.setLocationRelativeTo(null);
		frame.setVisible(true);
	}
}