Java实现匿名内部类的简单应用

在查看数码相片时，通常会使用一款图片查看软件，该软件应该能遍历文件夹下的所有图片并进行显示。编写程序，实现一个图片查看软件，它可以支持6张图片，通过单击不同的按钮就可以查看不同的图片。

思路分析：就是通过Window Builder组件新建个Application Window，在上面部署一些按钮，给按钮添加事件。需要注意的是，显示图片的方法是使用JLabel类的setIcon(new ImageIcon("图片路径"))方法。

代码如下：

import java.awt.EventQueue;

public class ImageViewer {

	private JFrame frame;
	JLabel lblNewLabel = new JLabel();
	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					ImageViewer window = new ImageViewer();
					window.frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the application.
	 */
	public ImageViewer() {
		initialize();
	}

	/**
	 * Initialize the contents of the frame.
	 */
	private void initialize() {
		frame = new JFrame("图片浏览器");
		frame.setBounds(100, 100, 336, 221);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.getContentPane().setLayout(null);		

		lblNewLabel.setBounds(101, 75, 117, 86);
		frame.getContentPane().add(lblNewLabel);
		JButton button = new JButton("\u56FE\u72471");
		button.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				lblNewLabel.setIcon(new ImageIcon("src/images/1.png"));
			}
		});
		button.setBounds(10, 10, 93, 23);
		frame.getContentPane().add(button);

		JButton button_1 = new JButton("\u56FE\u72472");
		button_1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				lblNewLabel.setIcon(new ImageIcon("src/images/2.png"));
			}
		});
		button_1.setBounds(113, 10, 93, 23);
		frame.getContentPane().add(button_1);

		JButton button_2 = new JButton("\u56FE\u72473");
		button_2.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				lblNewLabel.setIcon(new ImageIcon("src/images/3.png"));
			}
		});
		button_2.setBounds(216, 10, 93, 23);
		frame.getContentPane().add(button_2);

		JButton button_3 = new JButton("\u56FE\u72474");
		button_3.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				lblNewLabel.setIcon(new ImageIcon("src/images/4.png"));
			}
		});
		button_3.setBounds(10, 43, 93, 23);
		frame.getContentPane().add(button_3);

		JButton button_4 = new JButton("\u56FE\u72475");
		button_4.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				lblNewLabel.setIcon(new ImageIcon("src/images/5.png"));
			}
		});
		button_4.setBounds(113, 43, 93, 23);
		frame.getContentPane().add(button_4);

		JButton button_5 = new JButton("\u56FE\u72476");
		button_5.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				lblNewLabel.setIcon(new ImageIcon("src/images/6.png"));
			}
		});
		button_5.setBounds(216, 43, 93, 23);
		frame.getContentPane().add(button_5);

	}
}

　　效果如图：