JAVA有生成图片的类么?(具体请进)

Question

java类库没有这样的类和method

Answer 1

jdk里有生成jpg的包，包名com.sun.image.codec.jpeg
用法：
BufferedImage p = new BufferedImage(w,h,BufferedImage.TYPE_INT_RGB);
                        Graphics g = p.getGraphics();
                        //用g 绘制你的棋盘图片                         FileOutputStream out=new FileOutputStream(new File("xxx.jpg"));
                        JPEGImageEncoder encoder=JPEGCodec.createJPEGEncoder(out);
                         
                        JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(p);
                        param.setQuality(0.8f,true);
                        encoder.setJPEGEncodeParam(param);                        encoder.encode(p);
                        out.close();

Answer 2

用 java.awt.image.BufferedImage，取得它的 Graphics，然后在这个 Graphics 上画棋盘

Answer 3

/*
 * @(#) Test.java
 */package jamesfancy;import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;import javax.swing.JFrame;
import javax.swing.JPanel;public class Test {    public static Image createImage() {
        BufferedImage image = new BufferedImage(400, 400,
            BufferedImage.TYPE_3BYTE_BGR);
        Graphics2D g = image.createGraphics();        g.setColor(Color.WHITE);
        g.fillRect(0, 0, 400, 400);
        g.setColor(Color.RED);
        g.drawRect(100, 100, 200, 200);
        g.drawRect(50, 200, 300, 0);        g.dispose();
        return image;
    }    public static void main(String args[]) {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        MyPanel panel = new MyPanel(createImage());
        frame.getContentPane().add(panel);
        frame.pack();
        frame.setVisible(true);
    }
}class MyPanel extends JPanel {    Image image;    public MyPanel(Image image) {
        this.image = image;
        setPreferredSize(new Dimension(image.getWidth(this), image
            .getHeight(this)));
    }    public void paint(Graphics g) {
        super.paint(g);
        g.drawImage(image, 0, 0, this);
    }}