Java绘制图像旋转

太极图

import javax.swing.*;
import java.awt.*;
import java.awt.image.BufferedImage;public class DemoMain extends JFrame {public DemoMain() {DemoPanel demoPanel = new DemoPanel();new Thread(demoPanel).start();this.setVisible(true);this.setResizable(false);this.setTitle("旋转太极");this.add(demoPanel);this.setSize(Global.SIZE, Global.SIZE);this.setLocationRelativeTo(null);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}}class DemoPanel extends JPanel implements Runnable {int i = 0;// 图片旋转的度数@Overridepublic void paint(Graphics g) {Graphics2D g2d = (Graphics2D) g;RenderingHints renderingHints = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);renderingHints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);renderingHints.put(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);g2d.setRenderingHints(renderingHints);// 填充背景颜色g2d.setColor(Color.GRAY);g2d.fillRect(0, 0, Global.SIZE, Global.SIZE);// 创建一张缓存图片BufferedImage image = new BufferedImage(Global.SIZE, Global.SIZE, BufferedImage.TYPE_INT_RGB);Graphics graphics = image.getGraphics();// 填充背景颜色graphics.setColor(Color.GRAY);graphics.fillRect(0, 0, Global.SIZE, Global.SIZE);// 第一步：画二个大半圆graphics.setColor(Color.WHITE);graphics.fillArc(Global.X, Global.Y, Global.R, Global.R, 0, 180);graphics.setColor(Color.BLACK);graphics.fillArc(Global.X, Global.Y, Global.R, Global.R, 0, -180);// 第二步：画二个小半圆graphics.setColor(Color.WHITE);graphics.fillArc(Global.X + Global.R / 2, Global.Y + Global.R / 4, Global.R / 2, Global.R / 2, 0, -180);graphics.setColor(Color.BLACK);graphics.fillArc(Global.X, Global.Y + Global.R / 4, Global.R / 2, Global.R / 2, 0, 180);// 第三步：画二个小圆graphics.setColor(Color.WHITE);graphics.fillArc(Global.X + 3 * Global.R / 16, Global.Y + 7 * Global.R / 16, Global.R / 8, Global.R / 8, 0, 360);graphics.setColor(Color.BLACK);graphics.fillArc(Global.X + 11 * Global.R / 16, Global.Y + 7 * Global.R / 16, Global.R / 8, Global.R / 8, 0, 360);i += 2;if (i >= 360) {i = 0;}double theta = i * Math.PI / 180;g2d.rotate(theta, Global.SIZE / 2 - 8, Global.SIZE / 2 - 18);g2d.drawImage(image, 0, 0, Global.SIZE, Global.SIZE, null);}@Overridepublic void run() {while (true) {repaint();}}}class Global {public static final int SIZE = 500;// 窗口的大小public static final int R = SIZE - 100;// 图形的大小public static final int X = (SIZE - R) / 2 - 8;// 图形初始位置的x坐标public static final int Y = (SIZE - R) / 2 - 18;// 图形初始位置的y坐标}

图片旋转

import javax.swing.*;
import java.awt.*;public class Demo_Photo_rotate extends JFrame{public Demo_Photo_rotate(){this.setResizable(false);this.setTitle("旋转");RotatePanel rp=new RotatePanel("images/1.jpg");new Thread(rp).start();this.add(rp);this.setVisible(true);this.setSize(Global.SIZE, Global.SIZE);this.setLocationRelativeTo(null);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}}
class RotatePanel extends JPanel implements Runnable{String path;int i=0;public RotatePanel(String p){this.path=p;}@Overridepublic void paint(Graphics g) {Graphics2D g2d = (Graphics2D) g;RenderingHints renderingHints = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);renderingHints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);renderingHints.put(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);g2d.setRenderingHints(renderingHints);i += 2;if (i >= 360) {i = 0;}double theta = i * Math.PI / 180;g2d.rotate(theta, Global.SIZE / 2 - 8, Global.SIZE / 2 - 18);g2d.drawImage(new ImageIcon(this.getClass().getResource(path)).getImage(), 0, 0, Global.SIZE, Global.SIZE, null);}@Overridepublic void run() {while (true) {repaint();}}
}