Java图像旋转代码，java图像旋转,Java程序实现图像正逆

Java图像旋转代码，java图像旋转,Java程序实现图像正逆

Java程序实现图像正逆90度的旋转

import java.awt.BorderLayout;import java.awt.Container;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Image;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;public class RotateImage {    public static void main(String[] args){        JFrame frame=new RotateImgFrame();        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        frame.setVisible(true);    }}class RotateImgFrame extends JFrame{    public RotateImgFrame(){        setTitle("RotateImgTest");        setSize(WIDTH,HEIGHT);        setAlwaysOnTop(true);       final ImgPanel imgPanel=new ImgPanel();        imgPanel.setBounds(0, 0, 400, 400);        Container con=getContentPane();        con.add(imgPanel);        antiRotateBtn=new JButton("逆转");        rotateBtn=new JButton("正转");        btnPanel=new JPanel();        btnPanel.add(rotateBtn);        btnPanel.add(antiRotateBtn);        con.add(btnPanel,BorderLayout.SOUTH);        antiRotateBtn.addActionListener(new ActionListener(){            @Override            public void actionPerformed(ActionEvent e) {                // TODO Auto-generated method stub                imgPanel.setRotate(imgPanel.getRotate()-Math.PI/2);                imgPanel.repaint();            }        });        rotateBtn.addActionListener(new ActionListener(){            @Override            public void actionPerformed(ActionEvent e) {                // TODO Auto-generated method stub                imgPanel.setRotate(imgPanel.getRotate()+Math.PI/2);                imgPanel.repaint();            }        });    }    public static final int WIDTH=400;    public static final int HEIGHT=450;    private JPanel btnPanel;    private JButton antiRotateBtn;    private JButton rotateBtn;}class ImgPanel extends JPanel{    public void paintComponent(Graphics g){        Graphics2D g2=(Graphics2D) g;        g.fillRect(0, 0, 400, 400);        g2.rotate(rotate, 200, 200);        image=new ImageIcon("src/test.jpg").getImage();        int imgW=image.getWidth(this);        int imgH=image.getHeight(this);        g2.drawImage(image, (400-imgW)/2, (400-imgH)/2,this);        g2.dispose();    }    public Image getImage(){        return image;    }    public double getRotate(){        return rotate;    }    public void setRotate(double rotate){        this.rotate=rotate;    }    private Image image;    private double rotate=0;}