《Java程序设计》第14周实验作业：GUI编程初步

来源：互联网发布：linux如何查看时间编辑：程序博客网时间：2024/05/20 06:30
import java.awt.BorderLayout;import java.awt.EventQueue;import java.awt.Image;import javax.imageio.ImageIO;import javax.swing.ImageIcon;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.border.EmptyBorder;import javax.swing.JButton;import javax.swing.JLabel;import java.awt.Color;import java.awt.event.ActionListener;import java.awt.event.ActionEvent;import java.io.File;import java.io.IOException;public class ImgDemo extends JFrame {    private JPanel contentPane;    private int idImg = 1;    /**     * Launch the application.     */    public static void main(String[] args) {        EventQueue.invokeLater(new Runnable() {            public void run() {                try {                    ImgDemo frame = new ImgDemo();                    frame.setVisible(true);                } catch (Exception e) {                    e.printStackTrace();                }            }        });    }    /**     * Create the frame.     */    public ImgDemo() {        setTitle("\u56FE\u7247\u663E\u793A");        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        setBounds(100, 100, 576, 404);        contentPane = new JPanel();        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));        setContentPane(contentPane);        contentPane.setLayout(null);        final JLabel lblNewLabel = new JLabel("New label");        lblNewLabel.setBackground(Color.YELLOW);        lblNewLabel.setForeground(Color.PINK);        lblNewLabel.setBounds(48, 86, 467, 248);        contentPane.add(lblNewLabel);        JButton btnNewButton = new JButton("\u663E\u793A\u4E0B\u4E00\u5F20\u56FE\u7247");        btnNewButton.addActionListener(new ActionListener() {                   public void actionPerformed(ActionEvent e) {             try {                     // 获取图片的路径                     String strImgFile = "D:/demoPhoto/";                     // 得到图片的完整路径                     strImgFile = strImgFile + String.valueOf(idImg) + ".jpg";                     // 读取图片                     ImageIcon icon = new ImageIcon(ImageIO.read(new File(strImgFile)));                                          // 从图表中获取到图片                     Image image = icon.getImage();                      // 缩放图像                    Image smallImage = image.getScaledInstance(200,200,Image.SCALE_FAST);                                         //把Image文件转化为ImageIcon                     icon = new ImageIcon(smallImage);                     lblNewLabel.setIcon(icon);                     // 为下一张图片做准备，一共9张图片，显示完第9张后，重新显示第1张                     idImg = idImg+1;                     if(idImg==10)                         idImg = 1;                 } catch (IOException e1) {                     // TODO Auto-generated catch block                     e1.printStackTrace();                 }             }         });        btnNewButton.setBounds(194, 37, 153, 28);        contentPane.add(btnNewButton);        JButton btnNewButton0 = new JButton("显示上一个图片");        btnNewButton0.addActionListener(new ActionListener() {        public void actionPerformed(ActionEvent e) {         try {                     // 获取图片的路径                     String strImgFile = "D:/demoPhoto/";                     // 得到图片的完整路径                     strImgFile = strImgFile + String.valueOf(idImg) + ".jpg";                     // 读取图片                     ImageIcon icon = new ImageIcon(ImageIO.read(new File(strImgFile)));                                          // 从图表中获取到图片                     Image image = icon.getImage();                      // 缩放图像                    Image smallImage = image.getScaledInstance(200,200,Image.SCALE_FAST);                                         //把Image文件转化为ImageIcon                     icon = new ImageIcon(smallImage);                     lblNewLabel.setIcon(icon);                     // 为下一张图片做准备，一共9张图片，显示完第1张后，重新显示第9张                     idImg = idImg-1;                     if(idImg==0)                         idImg = 9;                 } catch (IOException e1) {                     // TODO Auto-generated catch block                     e1.printStackTrace();                 }             }         });        btnNewButton0.setBounds(40, 37, 153, 28);        contentPane.add(btnNewButton0);    }}
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