GUI编程初步

来源：互联网发布：安佳视讯软件编辑：程序博客网时间：2024/05/29 13:03
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, 400, 400);        contentPane.add(lblNewLabel);        JButton btnNewButton = new JButton("\u663E\u793A\u4E0B\u4E00\u5F20\u56FE\u7247");        btnNewButton.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                ImageIcon icon;                try {                    // 获取图片的路径                    String strImgFile = "E:/demoPhoto/";                    // 得到图片的完整路径                    strImgFile = strImgFile + String.valueOf(idImg) + ".jpg";                    // 读取图片                    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(400,400,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，重新显示第一张                    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);    }}
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