Java动画程序，图片分割成小块再汇聚

应用程序入口

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;


@SuppressWarnings("serial")
public class DrawNameOnBg extends JFrame {

	private JTextField textFrameRate;
	private JTextField textBlockSize;
	private JPanel panel;
//	private   PicPanel picPanel = new PicPanel();
	private   PicPanelUseBuffer picPanel = new PicPanelUseBuffer();
	
	public DrawNameOnBg() {
		setUndecorated(true);		
		getContentPane().setLayout(new BorderLayout());
		getContentPane().add(picPanel,BorderLayout.CENTER);
		getContentPane().add(getPanel(), BorderLayout.SOUTH);
		this.pack();//自动调整窗口大小	
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setLocationRelativeTo(null);//移至屏幕中心
		setVisible(true);
	}


	
	public static void main(String[] args) {
		new DrawNameOnBg();
	}
	/**
	 * @return 按钮面板
	 */
	protected JPanel getPanel() {
		if (panel == null) {
			panel = new JPanel();
			//帧率 
			final JLabel label_1 = new JLabel();
			label_1.setText("帧率：");
			panel.add(label_1);
			
			textFrameRate = new JTextField();
			textFrameRate.setText("20        ");
			panel.add(textFrameRate);
			
			//块大小
			final JLabel label = new JLabel();
			label.setText("块大小：");
			panel.add(label);

			textBlockSize = new JTextField();
			textBlockSize.setText(picPanel.subImWidth+"          ");
			textBlockSize.setMinimumSize(new Dimension(30, 20));
			panel.add(textBlockSize);
		
			//演示按钮
			final JButton buttonShow = new JButton();
			buttonShow.addActionListener(new ActionListener() {
				public void actionPerformed(final ActionEvent e) {
						new Thread(){
						@Override
						public void run() {
							try {
								int temp = Integer.valueOf(textBlockSize.getText().trim());
								picPanel.subImWidth=temp;
								picPanel.subImWidth=temp<5?5:temp;
								picPanel.subImWidth=temp>120?120:picPanel.subImWidth;
								textBlockSize.setText(String.valueOf(picPanel.subImWidth));
							} catch (Exception e2) {
								textBlockSize.setText(String.valueOf(picPanel.subImWidth));
							}
							try {
								int temp = Integer.valueOf(textFrameRate.getText().trim());
								if(temp<1)
								picPanel.frameRate=1;
								
								else if(temp>24)	picPanel.frameRate=24;
								else picPanel.frameRate=temp;
								textFrameRate.setText(String.valueOf(picPanel.frameRate));
								
							} catch (Exception e2) {
								textFrameRate.setText(String.valueOf(picPanel.frameRate));
							}
							
							
							picPanel.restart();						
						}}.start();
					

				}
			});
			panel.add(buttonShow);
			buttonShow.setText("演示");
			//退出按钮
			final JButton buttonExit = new JButton();
			buttonExit.addActionListener(new ActionListener() {
				public void actionPerformed(final ActionEvent e) {
					System.exit(0);
				}
			});
			buttonExit.setText("退出");
			panel.add(buttonExit);
			//旋转复选框
			final JCheckBox checkBoxRotate = new JCheckBox();
			checkBoxRotate.setSelected(picPanel.rotate);
			checkBoxRotate.addActionListener(new ActionListener() {
				public void actionPerformed(final ActionEvent e) {
					picPanel.rotate=!picPanel.rotate;
				}
			});
			checkBoxRotate.setText("旋转");
			panel.add(checkBoxRotate);
		}
		return panel;
	}
	

}

主要的Jpanel

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class PicPanelUseBuffer extends JPanel {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	BufferedImage bgIm, nameIm;//背景图片和名字图片
	BufferedImage[][][] nameSubIms;//分割后的图片，最后一维为各个方向的图片
	Point posCenters[][];//各个小图的中心坐标
	int subImWidth = 7;//分割后图片的宽度
	int x;		//名字图片的左上角坐标
	int y = 30;
	int xCenter;//汇聚中心坐标
	int yCenter = -30;
	int frames = 50;//帧数
	boolean act = false;//是否动画，控制绘图用
	int currentFrame;//当前帧
	final int coefficient = 10;//将汇聚中心到小图的距离分为10份，作为小图移动的步长
	int frameRate = 20;//帧率
	AffineTransform tr; //仿射变换对象
	final int directionNum = 8;//图片旋转方向数目
	int direction = 0;//当前帧绘制的图片的方向的序号
	boolean rotate = true;//控制是否旋转

	public PicPanelUseBuffer() {
		try {
			setDoubleBuffered(true);
			bgIm = ImageIO.read(new File("bg.jpg"));
			//在背景上写上名字和E-mail
			Graphics2D g = bgIm.createGraphics();
			g.setColor(Color.BLUE);
			g.setXORMode(Color.white);
			g.setFont(new Font("宋体", Font.BOLD | Font.ITALIC, 20));
			g.drawString("制作：2009310399 梁超 @ 清华", 5, g.getFontMetrics().getHeight());
			String email = "E-mail: [e-mail]";
			g.drawString(email, bgIm.getWidth()
					- SwingUtilities.computeStringWidth(g.getFontMetrics(), email) - 5, bgIm
					.getHeight() - 10);
			g.dispose();
			
			nameIm = ImageIO.read(new File("name.png"));
			x = (bgIm.getWidth() - nameIm.getWidth()) >> 1;//使得名字绘制在中心
			xCenter = bgIm.getWidth() / 2;
			tr = new AffineTransform();

			init();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	private void init() {//初始化分割后的图像
		nameSubIms = new BufferedImage[nameIm.getHeight() / subImWidth][nameIm.getWidth()
				/ subImWidth][directionNum];
		posCenters = new Point[nameSubIms.length][nameSubIms[0].length];

		for (int i = 0; i < nameSubIms.length; i++) {
			for (int j = 0; j < nameSubIms[i].length; j++) {
				nameSubIms[i][j][0] = nameIm.getSubimage(j * subImWidth, i * subImWidth,
						subImWidth, subImWidth);//旋转前的图像

				int xC = x + j * subImWidth + (subImWidth >> 1);//小图的中心坐标
				int yC = y + i * subImWidth + (subImWidth >> 1);
				// System.out.println(xC+"    "+yC+"    "+(xC -
				// xCenter)+"   "+(yC - yCenter));
				posCenters[i][j] = new Point(xC - xCenter, yC - yCenter);//到汇聚中心的向量
				for (int k = 1; k < nameSubIms[i][j].length; k++) {//产生各个方向的图片，注意由于旋转后图片变大，有删减
					nameSubIms[i][j][k] = new BufferedImage(subImWidth, subImWidth,
							BufferedImage.TYPE_INT_ARGB_PRE);
					Graphics2D g = nameSubIms[i][j][k].createGraphics();
					double angle = Math.PI * 2 / directionNum * k;
					if (xC < xCenter)
						angle = -angle;
//					tr.rotate(angle, subImWidth / 2, subImWidth / 2);
					tr.setToRotation(angle, subImWidth / 2, subImWidth / 2);
					g.drawImage(nameSubIms[i][j][0], tr, this);

					// System.out.println(nameSubIms[i][j][k]+"   "+subImWidth);
				}
			}
		}

	}

	@Override
	public void paint(Graphics g) {
//		final float alphaLow = 0.7f;
		super.paint(g);
		g.drawImage(bgIm, 0, 0, this);//绘制背景
		Graphics2D g2 = (Graphics2D) (g);
		if (act) {//动画时
			currentFrame--;
			direction++;//改变分割图片的方向
			if (direction >= directionNum)
				direction = 0;

			//绘制分割后的图片
			for (int j = 0; j < nameSubIms.length; j++) {
				for (int k = 0; k < nameSubIms[j].length; k++) {
					int xPos = xCenter + posCenters[j][k].x * Math.abs(currentFrame) / coefficient
							- (subImWidth >> 1);// + (int) ((Math.random() -
												// 0.5) * subImWidth);
					int yPos = yCenter + posCenters[j][k].y * Math.abs(currentFrame) / coefficient
							- (subImWidth >> 1);// + (int) ((Math.random() -
												// 0.5) * subImWidth);

					tr.setToTranslation(xPos, yPos);
					if (rotate)
						g2.drawImage(nameSubIms[j][k][direction], tr, this);
					else
						g2.drawImage(nameSubIms[j][k][0], tr, this);
					;
				}
			}

		} else {
			// ac = AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
			// alphaLow);
			// g2.setComposite(ac);
			g2.drawImage(nameIm, x, y, this);
		}
	}

	public void restart() {
		if (subImWidth != nameSubIms[0][0][0].getWidth())//改变分割图像大小，重新初始化
			init();

		act = true;
		currentFrame = frames;
		while(currentFrame > -coefficient) {
			try {
				Thread.sleep(1000 / frameRate);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			repaint();
		}
		act = false;
		repaint();

	}

	@Override
	public void update(Graphics g) {
		repaint();
	}

	@Override
	public Dimension getPreferredSize() {

		return new Dimension(bgIm.getWidth(), bgIm.getHeight());
	}
}