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：