java动画之单缓冲与双缓冲技术

 

这是一个简单的俄罗斯方块游戏,第一个采用JFrame默认的双缓冲,但是在快速重复执行repaint()方法时还是会闪烁,这是由于java绘图帧率不及屏幕刷新率,所以在第二个程序中使用了双缓冲技术,先将要绘制的图像绘制到Image对象中,然后一次性把这个Image对象通过Paint()方法绘制到窗口上:

package 俄罗斯方块;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.Menu;import java.awt.MenuBar;import java.awt.MenuItem;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.KeyEvent;import java.awt.event.KeyListener;import javax.swing.JFrame;import javax.swing.JOptionPane;public class JGameFrame_SigalBuffered extends JFrame implements Runnable, ActionListener,KeyListener {private static final long serialVersionUID = 2L;private final int blockSize = 20; // 一个原子方块的边长private final static int maxBlockRows = 4; // 一个组合形状所占的最大行数private static int roomCols = 18; // 游戏空间的列数,也就是宽度private static int roomRows = 25;// 游戏空间的行数,就是高度private static double randBlock;private static boolean isBlocked = false; // 状态标志,用来标示是否遇到阻碍,从而下降或者停止private static boolean gameGoing = true;// 标志游戏是否结束private static byte map[][] = new byte[roomRows + maxBlockRows][roomCols];private static int easy = 1000;// 四种游戏难度和一个瞬时落下的延时时间private static int middle = 500;private static int hard = 200;private static int crazy = 100;private static int immediate = 1;private static int difficulse = easy;// 游戏速度private static int selectDifficult = middle;private static boolean NormalSpeed = true;private static int PlayerScore = 0;static Thread gameThread;public static void main(String[] args) {JGameFrame_SigalBuffered my = new JGameFrame_SigalBuffered();gameThread = new Thread(my);gameThread.start();}public JGameFrame_SigalBuffered() {super("俄罗斯方块");setSize(roomCols * blockSize, (roomRows + 1) * blockSize + 30);setLocationRelativeTo(null);setAlwaysOnTop(true);setDefaultCloseOperation(EXIT_ON_CLOSE);setResizable(false);MenuBar manBar = new MenuBar();Menu setMenu = new Menu("选项");MenuItem exit = new MenuItem("exit");exit.addActionListener(this);MenuItem settingItem = new MenuItem("option");settingItem.addActionListener(this);setMenu.add(settingItem);setMenu.add(exit);manBar.add(setMenu);setMenuBar(manBar);addKeyListener(this);setVisible(true);}Color live = new Color(37,130,123);Color dead = new Color(171,162,123);Color sColor = new Color(148,56,53,80);@Overridepublic void paint(Graphics g) {super.paint(g);for (int i = 0; i < roomRows; i++) {for (int j = 0; j < roomCols; j++) {if (map[i + maxBlockRows][j] == 1) {g.setColor(live);g.fillRoundRect(j * blockSize, (i + 2) * blockSize + 3,blockSize - 1, blockSize - 1, blockSize / 4,blockSize / 4);g.drawString("" + (i + 1), i, j);}else if (map[i + maxBlockRows][j] == 2) {g.setColor(dead);g.fillRoundRect(j * blockSize, (i + 2) * blockSize + 5,blockSize - 1, blockSize - 1, blockSize / 4,blockSize / 4);}}}g.setColor(sColor);g.setFont(new Font("Jokerman", Font.PLAIN, 60));g.drawString("Score:"+PlayerScore, getWidth()/2-120, getHeight()/2-40);}private void fastenBlocks() {byte[] blockCont = new byte[roomRows];int score = 0;for (int i = 0; i < roomRows; i++) {blockCont[i] = 0;for (int j = 0; j < roomCols; j++) {if (map[i + maxBlockRows][j] == 1) {map[i + maxBlockRows][j] = 2;blockCont[i] += 1;} else if (map[i + maxBlockRows][j] == 2) {blockCont[i] += 1;}}}for (int i = 2; i < roomRows; i++) {if (blockCont[i]==roomCols) {//如果第i行满了,则整体下移一行clearRow(i+maxBlockRows);score++;}}PlayerScore += score*score;repaint();}private void displayAllElem() {for (int i = 0; i < roomRows; i++) {for (int j = 0; j < roomCols; j++) {System.out.print(map[i+maxBlockRows][j]);}System.out.print('/n');}}private void clearRow(int i){System.out.println("The row is full of blocks"+i);displayAllElem();for (int j = i; j >2 ; j--) {for (int j2 = 0; j2 < roomCols; j2++) {map[j][j2] = map[j-1][j2]; }}System.out.println("The row "+i+" move over!");displayAllElem();}private void fallDown() {// 传递给函数的是从0开始的真实行数isBlocked = false;for (int j = 0; j < maxBlockRows; j++)// 从当前行指针开始依次往上检查4行,如果有阻碍情况置is blocked为truefor (int i = 0; i < roomCols; i++) {if (map[rowPointer - j][i] == 1&& map[rowPointer - j + 1][i] == 2) {isBlocked = true;break;}if (isBlocked) {break;}}if (isBlocked == false) {// 如果检查完毕发现没有阻碍,那么把方块下移一行for (int i = 0; i < maxBlockRows; i++) {for (int j = 0; j < roomCols; j++) {if (map[rowPointer - i][j] == 1) {map[rowPointer - i + 1][j] = 1;map[rowPointer - i][j] = 0;repaint();}}}} else {if (rowPointer <= maxBlockRows) {loseIs();}}}private void moveToLeft() {boolean leftBlocked = false;for (int j = 0; j < maxBlockRows; j++) {if (map[rowPointer - j][0] == 1) {leftBlocked = true;break;} else {// 从当前行指针开始依次往上检查4行,如果有阻碍情况置left blocked为truefor (int i = 0; i < roomCols; i++) {if (map[rowPointer - j][i] == 1&& map[rowPointer - j][i - 1] == 2) {leftBlocked = true;break;}if (leftBlocked) {break;}}}}if (leftBlocked == false) {for (int i = 0; i < maxBlockRows; i++) {for (int j = 0; j < roomCols; j++) {if (map[rowPointer - i][j] == 1) {map[rowPointer - i][j - 1] = 1;map[rowPointer - i][j] = 0;}}repaint();}}}private void moveToRight() {boolean rightBlocked = false;for (int j = 0; j < maxBlockRows; j++) {if (map[rowPointer - j][roomCols - 1] == 1) {rightBlocked = true;break;} else {// 从当前行指针开始依次往上检查4行,如果有阻碍情况置right blocked为truefor (int i = 0; i < roomCols; i++) {if (map[rowPointer - j][i] == 1&& map[rowPointer - j][i + 1] == 2) {rightBlocked = true;break;}if (rightBlocked) {break;}}}}if (rightBlocked == false) {for (int i = 0; i < maxBlockRows; i++) {for (int j = roomCols - 1; j >= 0; j--) {if (map[rowPointer - i][j] == 1) {map[rowPointer - i][j + 1] = 1;map[rowPointer - i][j] = 0;}}repaint();}}}private void moveDown() {if (NormalSpeed) {NormalSpeed = false;} else {NormalSpeed = true;}}private void addNewBlock() {// 向room中添加一个新的方块,用随机数生成randBlock = Math.random() * 6;int center = roomCols / 2;if (randBlock > 5) {// 方块6: 拐弯N型map[1][center] = map[2][center] = map[2][center - 1] = map[3][center - 1] = 1;} else if (randBlock > 4) {// 方块4: 土字map[2][center] = map[3][center - 1] = map[3][center] = map[3][center + 1] = 1;} else if (randBlock > 3) {// 方块3: 方块map[2][center] = map[2][center - 1] = map[3][center] = map[3][center - 1] = 1;} else if (randBlock > 2) {// 方块2: | 长条直杠杠map[0][center] = map[1][center] = map[2][center] = map[3][center] = 1;} else if (randBlock > 1) {// 方块1: L型map[1][center] = map[2][center] = map[3][center] = map[3][center + 1] = 1;} else {// 方块0: 拐弯Nmap[1][center] = map[2][center] = map[2][center + 1] = map[3][center + 1] = 1;}}private void RollUp() {try {if ((int) randBlock == 3) {// 方块3: 方块return;}else if ((int) randBlock == 2) {// 方块2: | 长条直杠杠byte[][] clip = new byte[maxBlockRows][maxBlockRows];byte startCol = 0;for (byte i = 0; i < roomCols; i++) {if (map[rowPointer][i] == 1) {startCol = i;break;}}for (int i = 0; i < maxBlockRows; i++) {for (int i1 = 0; i1 < maxBlockRows; i1++) {if (map[rowPointer - maxBlockRows + 1 + i][i1+ startCol] == 2) {return;}}}// 已经获得当前方块区域的左下角坐标(rowpointer,startcol)if (map[rowPointer][startCol + 1] == 1) {// 如果直杠杠是横的状态for (int i = 0; i < maxBlockRows; i++) {clip[i][0] = 1;}for (int i = 0; i < maxBlockRows; i++) {for (int i1 = 1; i1 < maxBlockRows; i1++) {clip[i][i1] = 0;}}} else {// 如果直杠杠是竖着的状态for (int i = 0; i < maxBlockRows; i++) {clip[maxBlockRows - 1][i] = 1;// 把最下面的一行赋1}for (int i = 1; i < maxBlockRows; i++) {for (int i1 = 0; i1 < maxBlockRows; i1++) {clip[maxBlockRows - i - 1][i1] = 0;// 其余赋0}}}for (int i = 0; i < maxBlockRows; i++)for (int i1 = 0; i1 < maxBlockRows; i1++) {map[rowPointer - maxBlockRows + 1 + i][startCol + i1] = clip[i][i1];}repaint();}else {// 其他所有类型的方块都一样处理就可以,因为他们都是最多占3行3列byte[][] clip = new byte[maxBlockRows - 1][maxBlockRows - 1];byte startCol = (byte) roomCols;for (byte j = 0; j < maxBlockRows - 1; j++)for (byte i = 0; i < roomCols; i++) {if (map[rowPointer - j][i] == 1) {startCol = i < startCol ? i : startCol;}}for (int i = 0; i < maxBlockRows - 1; i++) {for (int j = 0; j < maxBlockRows - 1; j++) {if (map[rowPointer - maxBlockRows + 2 + j][startCol+ maxBlockRows - 2 - i] == 2)return;}}// 检测没有阻碍,开始赋给临时数组旋转后的值for (int i = 0; i < maxBlockRows - 1; i++) {for (int j = 0; j < maxBlockRows - 1; j++) {clip[maxBlockRows - 2 - j][i] = map[rowPointer - 2 + i][startCol+ j];}}// 开始变化for (int i = 0; i < maxBlockRows - 1; i++) {for (int j = 0; j < maxBlockRows - 1; j++) {map[rowPointer - maxBlockRows + 2 + i][startCol + j] = clip[i][j];}}repaint();// 将rowPointer归位for (int i = 0; i < maxBlockRows - 1; i++) {for (int j = 0; j < maxBlockRows - 1; j++) {if (map[rowPointer - i][startCol + j] != 0) {rowPointer = rowPointer - i;return;}}}}} catch (ArrayIndexOutOfBoundsException e) {System.out.println("由于java强大的数组越界访问检查机制,我可以在这些特殊情况下自动返回了");return;}}@SuppressWarnings("deprecation")private void loseIs() {// 输了,执行该方法,并对玩家进行一些讽刺~~System.out.print("You lose!~~~~~~~~");gameThread.stop();}static int rowPointer;@Overridepublic void run() {try {addNewBlock();while (gameGoing) {rowPointer = maxBlockRows - 1;while (rowPointer < roomRows + maxBlockRows - 1) {fallDown();if (isBlocked) {break;}rowPointer++;repaint();difficulse = selectDifficult;if (NormalSpeed) {Thread.sleep(difficulse);} else {Thread.sleep(immediate);}}NormalSpeed = true;fastenBlocks();addNewBlock();}} catch (InterruptedException e) {e.printStackTrace();}}private Object[] options = { "hard", "middle", "easy", "crazy" };@Overridepublic void actionPerformed(ActionEvent e) {//gameGoing = false;if (e.getActionCommand().equals("option")) {int difficuce = JOptionPane.showOptionDialog(null, "option","choose one", JOptionPane.DEFAULT_OPTION,JOptionPane.QUESTION_MESSAGE, null, options, options[2]);switch (difficuce) {case 0:setDifficulse(hard);break;case 1:setDifficulse(middle);break;case 2:setDifficulse(easy);break;case 3:setDifficulse(crazy);break;default:setDifficulse(middle);break;}} else {if (JOptionPane.showConfirmDialog(rootPane, "exit","are you sure?", JOptionPane.YES_OPTION) == 0) {System.exit(blockSize);}}//gameGoing = true;}public static void setDifficulse(int difficulse) {selectDifficult = difficulse;}@Overridepublic void keyPressed(KeyEvent e) {// left = 37; up 0= 38; right = 39; down = 40;int keycode = e.getKeyCode();if (keycode == 37)moveToLeft();else if (keycode == 38)RollUp();else if (keycode == 39)moveToRight();else if (keycode == 40)moveDown();else {System.out.println("What did you pressed?");}}@Overridepublic void keyReleased(KeyEvent e) {}@Overridepublic void keyTyped(KeyEvent e) {}} 

 

下面这个是双缓冲的代码:

 

package 俄罗斯方块;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.Image;import java.awt.Menu;import java.awt.MenuBar;import java.awt.MenuItem;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.KeyEvent;import java.awt.event.KeyListener;import javax.swing.JFrame;import javax.swing.JOptionPane;public class JGameFrame_DoubleBuffered extends JFrame implements Runnable, ActionListener,KeyListener {private static final long serialVersionUID = 2L;private final int blockSize = 20; // 一个原子方块的边长private final static int maxBlockRows = 4; // 一个组合形状所占的最大行数private static int roomCols = 18; // 游戏空间的列数,也就是宽度private static int roomRows = 25;// 游戏空间的行数,就是高度private static double randBlock;private static boolean isBlocked = false; // 状态标志,用来标示是否遇到阻碍,从而下降或者停止private static boolean gameGoing = true;// 标志游戏是否结束private static byte map[][] = new byte[roomRows + maxBlockRows][roomCols];private static int easy = 1000;// 四种游戏难度和一个瞬时落下的延时时间private static int middle = 500;private static int hard = 200;private static int crazy = 100;private static int immediate = 1;private static int difficulse = easy;// 游戏速度private static int selectDifficult = middle;private static boolean NormalSpeed = true;private static int PlayerScore = 0;static Thread gameThread;private Image buffImage;private Graphics buffGraphics;public static void main(String[] args) {JGameFrame_DoubleBuffered my = new JGameFrame_DoubleBuffered();gameThread = new Thread(my);gameThread.start();}public JGameFrame_DoubleBuffered() {super("俄罗斯方块");setSize(roomCols * blockSize, (roomRows + 1) * blockSize + 30);setLocationRelativeTo(null);setAlwaysOnTop(true);setDefaultCloseOperation(EXIT_ON_CLOSE);setResizable(false);MenuBar manBar = new MenuBar();Menu setMenu = new Menu("选项");MenuItem exit = new MenuItem("exit");exit.addActionListener(this);MenuItem settingItem = new MenuItem("option");settingItem.addActionListener(this);setMenu.add(settingItem);setMenu.add(exit);manBar.add(setMenu);setMenuBar(manBar);addKeyListener(this);setVisible(true);}Color live = new Color(37,130,123);Color dead = new Color(171,162,123);Color sColor = new Color(148,56,53,80);@Overridepublic void update(Graphics g) {g.drawImage(buffImage, 0, 0, null);}@Overridepublic void paint(Graphics g) {// TODO Auto-generated method stubupdate(g);}public void MYpaint() {buffImage = createImage(roomCols * blockSize, (roomRows + 1) * blockSize + 30);buffGraphics = buffImage.getGraphics();for (int i = 0; i < roomRows; i++) {for (int j = 0; j < roomCols; j++) {if (map[i + maxBlockRows][j] == 1) {buffGraphics.setColor(live);buffGraphics.fillRoundRect(j * blockSize, (i + 2) * blockSize + 3,blockSize - 1, blockSize - 1, blockSize / 4,blockSize / 4);buffGraphics.drawString("" + (i + 1), i, j);}else if (map[i + maxBlockRows][j] == 2) {buffGraphics.setColor(dead);buffGraphics.fillRoundRect(j * blockSize, (i + 2) * blockSize + 5,blockSize - 1, blockSize - 1, blockSize / 4,blockSize / 4);}}}buffGraphics.setColor(sColor);buffGraphics.setFont(new Font("Jokerman", Font.PLAIN, 60));buffGraphics.drawString("Score:"+PlayerScore, getWidth()/2-120, getHeight()/2-40);}private void fastenBlocks() {byte[] blockCont = new byte[roomRows];int score = 0;for (int i = 0; i < roomRows; i++) {blockCont[i] = 0;for (int j = 0; j < roomCols; j++) {if (map[i + maxBlockRows][j] == 1) {map[i + maxBlockRows][j] = 2;blockCont[i] += 1;} else if (map[i + maxBlockRows][j] == 2) {blockCont[i] += 1;}}}for (int i = 2; i < roomRows; i++) {if (blockCont[i]==roomCols) {//如果第i行满了,则整体下移一行clearRow(i+maxBlockRows);score++;}}PlayerScore += score*score;repaint();}private void clearRow(int i){System.out.println("The row is full of blocks"+i);for (int j = i; j >2 ; j--) {for (int j2 = 0; j2 < roomCols; j2++) {map[j][j2] = map[j-1][j2]; }}System.out.println("The row "+i+" move over!");}private void fallDown() {// 传递给函数的是从0开始的真实行数isBlocked = false;for (int j = 0; j < maxBlockRows; j++)// 从当前行指针开始依次往上检查4行,如果有阻碍情况置is blocked为truefor (int i = 0; i < roomCols; i++) {if (map[rowPointer - j][i] == 1&& map[rowPointer - j + 1][i] == 2) {isBlocked = true;break;}if (isBlocked) {break;}}if (isBlocked == false) {// 如果检查完毕发现没有阻碍,那么把方块下移一行for (int i = 0; i < maxBlockRows; i++) {for (int j = 0; j < roomCols; j++) {if (map[rowPointer - i][j] == 1) {map[rowPointer - i + 1][j] = 1;map[rowPointer - i][j] = 0;repaint();}}}} else {if (rowPointer <= maxBlockRows) {loseIs();}}}private void moveToLeft() {boolean leftBlocked = false;for (int j = 0; j < maxBlockRows; j++) {if (map[rowPointer - j][0] == 1) {leftBlocked = true;break;} else {// 从当前行指针开始依次往上检查4行,如果有阻碍情况置left blocked为truefor (int i = 0; i < roomCols; i++) {if (map[rowPointer - j][i] == 1&& map[rowPointer - j][i - 1] == 2) {leftBlocked = true;break;}if (leftBlocked) {break;}}}}if (leftBlocked == false) {for (int i = 0; i < maxBlockRows; i++) {for (int j = 0; j < roomCols; j++) {if (map[rowPointer - i][j] == 1) {map[rowPointer - i][j - 1] = 1;map[rowPointer - i][j] = 0;}}repaint();}}}private void moveToRight() {boolean rightBlocked = false;for (int j = 0; j < maxBlockRows; j++) {if (map[rowPointer - j][roomCols - 1] == 1) {rightBlocked = true;break;} else {// 从当前行指针开始依次往上检查4行,如果有阻碍情况置right blocked为truefor (int i = 0; i < roomCols; i++) {if (map[rowPointer - j][i] == 1&& map[rowPointer - j][i + 1] == 2) {rightBlocked = true;break;}if (rightBlocked) {break;}}}}if (rightBlocked == false) {for (int i = 0; i < maxBlockRows; i++) {for (int j = roomCols - 1; j >= 0; j--) {if (map[rowPointer - i][j] == 1) {map[rowPointer - i][j + 1] = 1;map[rowPointer - i][j] = 0;}}repaint();}}}private void moveDown() {if (NormalSpeed) {NormalSpeed = false;} else {NormalSpeed = true;}}private void addNewBlock() {// 向room中添加一个新的方块,用随机数生成randBlock = Math.random() * 6;int center = roomCols / 2;if (randBlock > 5) {// 方块6: 拐弯N型map[1][center] = map[2][center] = map[2][center - 1] = map[3][center - 1] = 1;} else if (randBlock > 4) {// 方块4: 土字map[2][center] = map[3][center - 1] = map[3][center] = map[3][center + 1] = 1;} else if (randBlock > 3) {// 方块3: 方块map[2][center] = map[2][center - 1] = map[3][center] = map[3][center - 1] = 1;} else if (randBlock > 2) {// 方块2: | 长条直杠杠map[0][center] = map[1][center] = map[2][center] = map[3][center] = 1;} else if (randBlock > 1) {// 方块1: L型map[1][center] = map[2][center] = map[3][center] = map[3][center + 1] = 1;} else {// 方块0: 拐弯Nmap[1][center] = map[2][center] = map[2][center + 1] = map[3][center + 1] = 1;}}private void RollUp() {try {if ((int) randBlock == 3) {// 方块3: 方块return;}else if ((int) randBlock == 2) {// 方块2: | 长条直杠杠byte[][] clip = new byte[maxBlockRows][maxBlockRows];byte startCol = 0;for (byte i = 0; i < roomCols; i++) {if (map[rowPointer][i] == 1) {startCol = i;break;}}for (int i = 0; i < maxBlockRows; i++) {for (int i1 = 0; i1 < maxBlockRows; i1++) {if (map[rowPointer - maxBlockRows + 1 + i][i1+ startCol] == 2) {return;}}}// 已经获得当前方块区域的左下角坐标(rowpointer,startcol)if (map[rowPointer][startCol + 1] == 1) {// 如果直杠杠是横的状态for (int i = 0; i < maxBlockRows; i++) {clip[i][0] = 1;}for (int i = 0; i < maxBlockRows; i++) {for (int i1 = 1; i1 < maxBlockRows; i1++) {clip[i][i1] = 0;}}} else {// 如果直杠杠是竖着的状态for (int i = 0; i < maxBlockRows; i++) {clip[maxBlockRows - 1][i] = 1;// 把最下面的一行赋1}for (int i = 1; i < maxBlockRows; i++) {for (int i1 = 0; i1 < maxBlockRows; i1++) {clip[maxBlockRows - i - 1][i1] = 0;// 其余赋0}}}for (int i = 0; i < maxBlockRows; i++)for (int i1 = 0; i1 < maxBlockRows; i1++) {map[rowPointer - maxBlockRows + 1 + i][startCol + i1] = clip[i][i1];}repaint();}else {// 其他所有类型的方块都一样处理就可以,因为他们都是最多占3行3列byte[][] clip = new byte[maxBlockRows - 1][maxBlockRows - 1];byte startCol = (byte) roomCols;for (byte j = 0; j < maxBlockRows - 1; j++)for (byte i = 0; i < roomCols; i++) {if (map[rowPointer - j][i] == 1) {startCol = i < startCol ? i : startCol;}}for (int i = 0; i < maxBlockRows - 1; i++) {for (int j = 0; j < maxBlockRows - 1; j++) {if (map[rowPointer - maxBlockRows + 2 + j][startCol+ maxBlockRows - 2 - i] == 2)return;}}// 检测没有阻碍,开始赋给临时数组旋转后的值for (int i = 0; i < maxBlockRows - 1; i++) {for (int j = 0; j < maxBlockRows - 1; j++) {clip[maxBlockRows - 2 - j][i] = map[rowPointer - 2 + i][startCol+ j];}}// 开始变化for (int i = 0; i < maxBlockRows - 1; i++) {for (int j = 0; j < maxBlockRows - 1; j++) {map[rowPointer - maxBlockRows + 2 + i][startCol + j] = clip[i][j];}}repaint();// 将rowPointer归位for (int i = 0; i < maxBlockRows - 1; i++) {for (int j = 0; j < maxBlockRows - 1; j++) {if (map[rowPointer - i][startCol + j] != 0) {rowPointer = rowPointer - i;return;}}}}} catch (ArrayIndexOutOfBoundsException e) {System.out.println("由于java强大的数组越界访问检查机制,我可以在这些特殊情况下自动返回了");return;}}@SuppressWarnings("deprecation")private void loseIs() {// 输了,执行该方法,并对玩家进行一些讽刺~~System.out.print("You lose!~~~~~~~~");gameThread.stop();}static int rowPointer;@Overridepublic void run() {try {addNewBlock();while (gameGoing) {rowPointer = maxBlockRows - 1;while (rowPointer < roomRows + maxBlockRows - 1) {fallDown();if (isBlocked) {break;}rowPointer++;MYpaint();repaint();difficulse = selectDifficult;if (NormalSpeed) {Thread.sleep(difficulse);} else {Thread.sleep(immediate);}}NormalSpeed = true;fastenBlocks();addNewBlock();}} catch (InterruptedException e) {e.printStackTrace();}}private Object[] options = { "hard", "middle", "easy", "crazy" };@Overridepublic void actionPerformed(ActionEvent e) {if (e.getActionCommand().equals("option")) {int difficuce = JOptionPane.showOptionDialog(null, "option","choose one", JOptionPane.DEFAULT_OPTION,JOptionPane.QUESTION_MESSAGE, null, options, options[2]);switch (difficuce) {case 0:setDifficulse(hard);break;case 1:setDifficulse(middle);break;case 2:setDifficulse(easy);break;case 3:setDifficulse(crazy);break;default:setDifficulse(middle);break;}} else {if (JOptionPane.showConfirmDialog(rootPane, "exit","are you sure?", JOptionPane.YES_OPTION) == 0) {System.exit(blockSize);}}}public static void setDifficulse(int difficulse) {selectDifficult = difficulse;}@Overridepublic void keyPressed(KeyEvent e) {// left = 37; up 0= 38; right = 39; down = 40;int keycode = e.getKeyCode();if (keycode == 37)moveToLeft();else if (keycode == 38)RollUp();else if (keycode == 39)moveToRight();else if (keycode == 40)moveDown();else {System.out.println("What did you pressed?");}}@Overridepublic void keyReleased(KeyEvent e) {}@Overridepublic void keyTyped(KeyEvent e) {}}

使用双缓冲技术后效果还是非常明显的,绘图是绝不会闪烁而且看起开更流畅了!

但是现在使用还不是很熟练,继续努力!!