showimg.java

Java程序设计实用教程源代码 本书源代码按章分别放置在不同的文件夹中,所有程序均在JDK1.6环境下编译运行正常,除了第13章需要建立ODBC数据源之外,其他程序只要有Java运行环境即可直接运行

import java.awt.*;
import java.awt.image.*;
import javax.swing.*;
import javax.imageio.ImageIO;
import java.io.*;
public class showImg
    extends JFrame {
  private Image image;
  private int width, height;
  public showImg() {
    super("加载图像");
    try {
      File f = new File("aa.jpg");
      image = ImageIO.read(f);
      width = ( (BufferedImage) image).getWidth();
      height = ( (BufferedImage) image).getHeight();
      setSize(width + 2, 3 * height / 2 + 2);
    }
    catch (Exception e) {}
  }

  public void paint(Graphics g) {
    super.paint(g);
    g.drawImage(image, 0, 0, this);
    g.drawImage(image, 0, height + 1, width / 2, height / 2, this);
  }

  public static void main(String args[]) {
    showImg app = new showImg();
    app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    app.setVisible(true);
  }
}