《Java程序设计》第14周实验作业：GUI编程初步

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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, 604);
		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(58, 86, 600, 500);
		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);
	}
}

《Java程序设计》第14周实验作业：GUI编程初步

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原文地址：http://blog.csdn.net/u013910357/article/details/46633411