学习程序开发，编一个俄罗斯方块游戏很不错的选择，既可以练一下算法，又可以学习界面开发。
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源代码：
import javax.swing.*;import java.awt.*;import java.awt.event.KeyAdapter;import java.awt.event.KeyEvent;import java.awt.geom.Arc2D;import java.awt.geom.Ellipse2D;import java.awt.geom.GeneralPath;import java.awt.geom.Rectangle2D;public class ARusia extends JFrame implements Runnable {PicPanel rl = new PicPanel();MsgPanel ml = new MsgPanel();String realMsg = new String();int myLevel;int myLines;int myPoints;boolean bStop;Tetris myTetris;Blocks myBlocks;public ARusia() {super("Rusia");setSize(600, 600);setDefaultCloseOperation(EXIT_ON_CLOSE);setLayout(new GridLayout(1, 2));add(rl);add(ml);KeyMonitor monitor = new KeyMonitor(this);setFocusable(true);addKeyListener(monitor);setVisible(true);bStop = true;myLevel = 1;myLines = 0;myPoints = 0;myBlocks = new Blocks();myTetris = new Tetris(20, 10, myBlocks);ml.setRealMsg("Press SPACE key to play!");ml.setLevelMsg(1);ml.setLinesMsg(0);ml.setPointsMsg(0);}public void StopPlay() {bStop = true;ml.setRealMsg("Press SPACE key to play!");}public boolean isStop() {return bStop;}public int getPoints(int l) {if (l == 0) {return 0;}int pt = 0;switch (l) {case 1:pt = 100;break;case 2:pt = 300;break;case 3:pt = 500;break;default:pt = 700;}return pt;}public Tetris getTetris() {return myTetris;}public void run() {myTetris.clearValues();myBlocks.setCurrentBlock();myBlocks.creatNextBlock();ml.updateBlockPic(myBlocks.getNextBlock());myTetris.newBlockEnter();bStop = false;ml.setRealMsg("Press ESC key to play!");while (!bStop) {try {if (!myTetris.moveDown()) {myTetris.stopDown();int tl = 0;rl.updateBlockPic(myTetris.tr, myTetris.getDet());int l = myTetris.getFullRow();while (l > 0) {myTetris.delOneRow(l);tl++;rl.updateBlockPic(myTetris.tr, myTetris.getDet());Thread.sleep(1000 / myLevel);while (myTetris.downOneRow()) {rl.updateBlockPic(myTetris.tr, myTetris.getDet());}l = myTetris.getFullRow();}myTetris.stopDown();myLines += tl;myPoints += getPoints(tl);myLevel = (int) (myLines / 15) + 1;ml.setLinesMsg(myLines);ml.setPointsMsg(myPoints);ml.setLevelMsg(myLevel);myBlocks.setCurrentBlock();myBlocks.creatNextBlock();ml.updateBlockPic(myBlocks.getNextBlock());myTetris.newBlockEnter();}rl.updateBlockPic(myTetris.tr, myTetris.getDet());Thread.sleep(1000 / myLevel);} catch (InterruptedException e) {e.printStackTrace();}}}/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubARusia ar = new ARusia();}}class PicPanel extends JPanel {JButton[][] rt = new JButton[20][10];public PicPanel() {GridLayout pl = new GridLayout(20, 10);setLayout(pl);for (int i = 0; i < 20; i++) {for (int j = 0; j < 10; j++) {rt[i][j] = new JButton("");add(rt[i][j]);rt[i][j].setEnabled(false);}}}public void updateBlockPic(int[][] r, int rowdet) {for (int i = 0; i < 20; i++) {for (int j = 0; j < 10; j++) {if (r[i + rowdet][j] == 0) {rt[i][j].setEnabled(false);rt[i][j].setBackground(Color.GRAY);} else {rt[i][j].setEnabled(true);rt[i][j].setBackground(Color.BLUE);}}}}}class MsgPanel extends JPanel {JButton[][] rt = new JButton[4][4];String realMsg = new String();int myLevel;int myLines;int myPoints;public MsgPanel() {GridLayout pl = new GridLayout(5, 1);setLayout(pl);JPanel cp = new JPanel();cp.setLayout(new GridLayout(1, 3));JPanel p1 = new JPanel();cp.add(p1);JPanel p2 = new JPanel();p2.setLayout(new GridLayout(4, 4));for (int i = 0; i < 4; i++) {for (int j = 0; j < 4; j++) {rt[i][j] = new JButton("");p2.add(rt[i][j]);rt[i][j].setEnabled(false);}}cp.add(p2);JPanel p3 = new JPanel();cp.add(p3);add(cp);}public void updateBlockPic(int[][] r) {for (int i = 0; i < 4; i++) {for (int j = 0; j < 4; j++) {if (r[i][j] == 0) {rt[i][j].setEnabled(false);rt[i][j].setBackground(Color.GRAY);} else {rt[i][j].setEnabled(true);rt[i][j].setBackground(Color.CYAN);}}}}public void setRealMsg(String s) {realMsg = s;repaint();}public void setLinesMsg(int l) {myLines = l;repaint();}public void setLevelMsg(int l) {myLevel = l;repaint();}public void setPointsMsg(int p) {myPoints = p;repaint();}public void paintComponent(Graphics comp) {Graphics2D comp2D = (Graphics2D) comp;comp2D.setColor(Color.white);comp2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);Rectangle2D.Float background = new Rectangle2D.Float(0F, 0F,(float) getSize().width, (float) getSize().height);comp2D.fill(background);comp2D.setColor(Color.red);Rectangle2D.Float boundrt = new Rectangle2D.Float(0F,(float) getSize().height / 5, (float) getSize().width - 2,(float) getSize().height - 15);comp2D.draw(boundrt);Font font = new Font("Times New Roman", Font.ITALIC, 22);comp2D.setFont(font);comp2D.setColor(Color.black);comp2D.drawString("Level " + myLevel, 50F,(float) getSize().height / 8 * 3);comp2D.drawString("Lines " + myLines, 50F,(float) getSize().height / 8 * 4);comp2D.drawString("Points " + myPoints, 50F,(float) getSize().height / 8 * 5);font = new Font("Times New Roman", Font.ITALIC, 16);comp2D.setFont(font);comp2D.setColor(Color.blue);comp2D.drawString(realMsg, 50F, (float) getSize().height / 8 * 6);}}class Tetris {int[][] tr;int rows, columns;int det = 4;int curRow, curColumn;Blocks mBlocks;public Tetris(int r, int c, Blocks blks) {rows = r + det;columns = c;tr = new int[rows][columns];mBlocks = blks;}public int getDet() {return det;}public boolean isInBound(int r, int c) {if (r >= 0 && r < rows && c >= 0 && c < columns) {return true;}return false;}public boolean newBlockEnter() {curRow = det - 1;curColumn = 4;for (int i = 0; i < 4; i++)for (int j = 0; j < 4; j++) {if (tr[i][j + curColumn] > 0&& mBlocks.getCurrentBlock()[i][j] > 0) {return false;}}for (int i = det - 4; i < det; i++)for (int j = 0; j < 4; j++) {if (tr[i][j + curColumn] == 0) {tr[i][j + curColumn] = mBlocks.getCurrentBlock()[i][j];}}return true;}public void setValues(int ro, int cl, int[][] value) {for (int i = 0; i < 4; i++) {for (int j = 0; j < 4; j++) {if (value[i][j] > 0 && isInBound(ro - 3 + i, cl + j)) {tr[ro - 3 + i][cl + j] = value[i][j];}}}}public void clearValues() {for (int i = 0; i < rows; i++)for (int j = 0; j < columns; j++) {tr[i][j] = 0;}}public int getFullRow() {boolean bOK;for (int i = rows - 1; i >= 0; i--) {bOK = true;for (int j = 0; j < columns; j++) {if (tr[i][j] == 0) {bOK = false;j = columns;}}if (bOK) {return i - det;}}return -1;}public void delOneRow(int r) {for (int j = 0; j < columns; j++) {tr[r + det][j] = 0;}for (int i = r + det; i >= 0; i--) {for (int j = 0; j < columns; j++) {if (tr[i][j] > 0) {tr[i][j] = 2;}}}}public boolean downOneRow() {boolean bMove = false;for (int i = 0; i < rows; i++) {for (int j = 0; j < columns; j++) {if (tr[i][j] == 2) {bMove = true;if (i == rows - 1) {return false;}if (tr[i + 1][j] == 1) {return false;}}}}if (!bMove) {return false;}for (int i = rows - 1; i > 0; i--) {for (int j = 0; j < columns; j++) {if (tr[i][j] == 0 && tr[i - 1][j] == 2) {tr[i][j] = 2;tr[i - 1][j] = 0;}}}return true;}public boolean rotateClock() {for (int i = curRow - 3; i <= curRow; i++) {for (int j = curColumn; j < curColumn + 4; j++) {if (isInBound(i, j)) {if (tr[i][j] == 2) {tr[i][j] = 0;}}}}mBlocks.rotateCurrentBlockClock();for (int i = 0; i < 4; i++) {for (int j = 0; j < 4; j++) {if (!isInBound(curRow - 3 + i, curColumn + j)&& mBlocks.getCurrentBlock()[i][j] == 2) {mBlocks.rotateCurrentBlockUnClock();setValues(curRow, curColumn, mBlocks.getCurrentBlock());return false;}if (isInBound(curRow - 3 + i, curColumn + j)) {if (tr[curRow - 3 + i][curColumn + j] == 1&& mBlocks.getCurrentBlock()[i][j] == 2) {mBlocks.rotateCurrentBlockUnClock();setValues(curRow, curColumn, mBlocks.getCurrentBlock());return false;}}}}setValues(curRow, curColumn, mBlocks.getCurrentBlock());return true;}public boolean rotateUnClock() {for (int i = curRow - 3; i <= curRow; i++) {for (int j = curColumn; j < curColumn + 4; j++) {if (isInBound(i, j)) {if (tr[i][j] == 2) {tr[i][j] = 0;}}}}mBlocks.rotateCurrentBlockUnClock();for (int i = 0; i < 4; i++) {for (int j = 0; j < 4; j++) {if (!isInBound(curRow - 3 + i, curColumn + j)&& mBlocks.getCurrentBlock()[i][j] == 2) {mBlocks.rotateCurrentBlockClock();setValues(curRow, curColumn, mBlocks.getCurrentBlock());return false;}if (isInBound(curRow - 3 + i, curColumn + j)) {if (tr[curRow - 3 + i][curColumn + j] == 1&& mBlocks.getCurrentBlock()[i][j] == 2) {mBlocks.rotateCurrentBlockClock();setValues(curRow, curColumn, mBlocks.getCurrentBlock());return false;}}}}setValues(curRow, curColumn, mBlocks.getCurrentBlock());return true;}public boolean moveDown() {for (int i = 0; i < rows; i++) {for (int j = 0; j < columns; j++) {if (tr[i][j] == 2 && i == rows - 1) {return false;}if (tr[i][j] == 2 && tr[i + 1][j] == 1) {return false;}}}for (int i = rows - 1; i >= 0; i--) {for (int j = 0; j < columns; j++) {if (tr[i][j] == 2 && tr[i + 1][j] == 0) {tr[i + 1][j] = 2;tr[i][j] = 0;}}}curRow++;return true;}public boolean moveLeft() {for (int i = curRow - 3; i <= curRow; i++) {for (int j = curColumn; j < curColumn + 4; j++) {if (!isInBound(i, j)) {continue;}if (tr[i][j] == 2 && j == 0) {return false;}if (tr[i][j] == 2 && tr[i][j - 1] == 1) {return false;}}}for (int i = curRow; i > curRow - 4; i--) {for (int j = 1; j < columns; j++) {if (tr[i][j - 1] == 0 && tr[i][j] == 2) {tr[i][j - 1] = 2;tr[i][j] = 0;}}}curColumn--;return true;}public boolean moveRight() {for (int i = curRow - 3; i <= curRow; i++) {for (int j = curColumn; j < curColumn + 4; j++) {if (!isInBound(i, j)) {continue;}if (tr[i][j] == 2 && j == columns - 1) {return false;}if (tr[i][j] == 2 && tr[i][j + 1] == 1) {return false;}}}for (int i = curRow; i > curRow - 4; i--) {for (int j = columns - 2; j >= 0; j--) {if (tr[i][j + 1] == 0 && tr[i][j] == 2) {tr[i][j + 1] = 2;tr[i][j] = 0;}}}curColumn++;return true;}public void stopDown() {for (int i = 0; i < rows; i++) {for (int j = 0; j < columns; j++) {if (tr[i][j] == 2) {tr[i][j] = 1;}}}}}class Blocks {int[][][] blk = new int[7][][];int[][] currentBlk = new int[4][4];int[][] nextBlk = new int[4][4];int blkMax;public Blocks() {blk[0] = new int[][] { { 0, 2, 0, 0 }, { 0, 2, 0, 0 }, { 0, 2, 0, 0 },{ 0, 2, 0, 0 } };blk[1] = new int[][] { { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 },{ 2, 2, 2, 2 } };blk[2] = new int[][] { { 0, 0, 0, 0 }, { 0, 2, 0, 0 }, { 0, 2, 0, 0 },{ 0, 2, 2, 0 } };blk[3] = new int[][] { { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 2, 2, 2, 0 },{ 0, 2, 0, 0 } };blk[4] = new int[][] { { 0, 0, 0, 0 }, { 0, 0, 2, 0 }, { 0, 2, 2, 0 },{ 0, 2, 0, 0 } };blk[5] = new int[][] { { 0, 0, 0, 0 }, { 0, 2, 0, 0 }, { 0, 2, 2, 0 },{ 0, 0, 2, 0 } };blk[6] = new int[][] { { 0, 0, 0, 0 }, { 0, 0, 2, 0 }, { 0, 0, 2, 0 },{ 0, 2, 2, 0 } };blkMax = 7;int c = (int) (Math.random() * blkMax);for (int i = 0; i < 4; i++)for (int j = 0; j < 4; j++) {currentBlk[i][j] = blk[c][i][j];}c = (int) (Math.random() * blkMax);for (int i = 0; i < 4; i++)for (int j = 0; j < 4; j++) {nextBlk[i][j] = blk[c][i][j];}}public int[][] getNextBlock() {return nextBlk;}public int[][] getCurrentBlock() {return currentBlk;}public void setCurrentBlock() {for (int i = 0; i < 4; i++)for (int j = 0; j < 4; j++) {currentBlk[i][j] = nextBlk[i][j];}}public void creatNextBlock() {int c = (int) (Math.random() * blkMax);for (int i = 0; i < 4; i++)for (int j = 0; j < 4; j++) {nextBlk[i][j] = blk[c][i][j];}}public void rotateCurrentBlockClock() {int[][] tb = new int[4][4];for (int i = 0; i < 4; i++)for (int j = 0; j < 4; j++) {tb[i][j] = currentBlk[i][j];}for (int i = 0; i < 4; i++)for (int j = 0; j < 4; j++) {currentBlk[i][j] = tb[3 - j][i];}}public void rotateCurrentBlockUnClock() {int[][] tb = new int[4][4];for (int i = 0; i < 4; i++)for (int j = 0; j < 4; j++) {tb[i][j] = currentBlk[i][j];}for (int i = 0; i < 4; i++)for (int j = 0; j < 4; j++) {currentBlk[3 - j][i] = tb[i][j];}}}class KeyMonitor extends KeyAdapter {ARusia display;KeyMonitor(ARusia display) {this.display = display;}public void keyPressed(KeyEvent event) {switch (event.getKeyCode()) {case KeyEvent.VK_UP:if (display.getTetris().rotateUnClock()) {display.rl.updateBlockPic(display.getTetris().tr, display.getTetris().getDet());}break;case KeyEvent.VK_A:if (display.getTetris().rotateClock()) {display.rl.updateBlockPic(display.getTetris().tr, display.getTetris().getDet());}break;case KeyEvent.VK_DOWN:if (display.getTetris().moveDown()) {display.rl.updateBlockPic(display.getTetris().tr, display.getTetris().getDet());}break;case KeyEvent.VK_LEFT:if (display.getTetris().moveLeft()) {display.rl.updateBlockPic(display.getTetris().tr, display.getTetris().getDet());}break;case KeyEvent.VK_RIGHT:if (display.getTetris().moveRight()) {display.rl.updateBlockPic(display.getTetris().tr, display.getTetris().getDet());}break;case KeyEvent.VK_ESCAPE:display.StopPlay();break;case KeyEvent.VK_SPACE:if (display.isStop()) {Thread th1 = new Thread(display);th1.start();}break;default:;}display.repaint();}}
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而有的旅行是释放负面情绪，换个心情，轻装上阵。
