简易版2048 (KeyListener需重写所有函数&&JFrame和JLabel设置颜色)

转载请标明出处：http://blog.csdn.net/idealism_xxm/article/details/50284487，本文出自：【idealism_xxm的博客】

 

根据必要功能按照自己的想法写了一下，可能实现得比较麻烦，但是感觉还不错，暂时没发现其他bug

 

 

import javax.swing.*;import java.awt.*;import java.awt.event.*;import java.awt.event.KeyListener;/* * 未设置不同数字的大小 * 未设置实时显示分数 * ……总之就是最简易的版本 */public class Game extends JFrame {private final int LEN=100,MAXN=4;//LEN是一个方块的边长，MAXN是方阵的阶数private JLabel[][] jlb=new JLabel[MAXN][MAXN];private int num[][]=new int[MAXN][MAXN];private int filled,score;public Game() {getContentPane().setBackground(new Color(187,173,160));//【注意】JFrame应该这样改变颜色setLayout(new GridLayout(MAXN,MAXN,10,10));for(int i=0;i<MAXN;++i) {for(int j=0;j<MAXN;++j) {num[i][j]=0;add(jlb[i][j]=new JLabel());jlb[i][j].setBackground(getBkgColor(0));jlb[i][j].setForeground(getFrgColor(0));jlb[i][j].setOpaque(true);//【注意】JLabel默认情况下是透明，所以只能先将其设成不透明才能显示颜色jlb[i][j].setText(null);jlb[i][j].setHorizontalAlignment(JLabel.CENTER);//居中显示}}addKeyListener(new KeyListener() {@Overridepublic void keyPressed(KeyEvent e) {switch(e.getKeyCode()) {case KeyEvent.VK_LEFT: {if(moveLeft()) {next();display();if(!canMove()) {JOptionPane.showMessageDialog(null,"Score:"+score, "Game Over", JOptionPane.PLAIN_MESSAGE, null); reset();}}return;}case KeyEvent.VK_UP: {turnClockwise(3);if(moveLeft()) {turnClockwise(1);next();display();if(!canMove()) {JOptionPane.showMessageDialog(null,"Score:"+score, "Game Over", JOptionPane.PLAIN_MESSAGE, null);reset();}}else {turnClockwise(1);}return;}case KeyEvent.VK_RIGHT: {turnClockwise(2);if(moveLeft()) {turnClockwise(2);next();display();if(!canMove()) {JOptionPane.showMessageDialog(null,"Score:"+score, "Game Over", JOptionPane.PLAIN_MESSAGE, null);reset();}}else {turnClockwise(2);}return;}case KeyEvent.VK_DOWN: {turnClockwise(1);if(moveLeft()) {turnClockwise(3);next();display();if(!canMove()) {JOptionPane.showMessageDialog(null,"Score:"+score, "Game Over", JOptionPane.PLAIN_MESSAGE, null);reset();}}else {turnClockwise(3);}return;}}}@Overridepublic void keyReleased(KeyEvent e) {}@Overridepublic void keyTyped(KeyEvent e) {}});reset();setTitle(""+2048);setSize(LEN*MAXN+10,LEN*MAXN+10);setLocationRelativeTo(null);setResizable(false);setVisible(true);}private void reset() {score=filled=0;for(int r=0;r<MAXN;++r)for(int c=0;c<MAXN;++c)num[r][c]=0;next();next();display();}private boolean canMove() {//判断能否继续移动if(filled!=MAXN*MAXN)return true;int ori[][]=new int[4][4],tmp=filled,temp=score;myCopy(num,ori);if(!moveLeft()) {//无法向左移动myCopy(ori,num);turnClockwise(3);if(!moveLeft()) {//无法向上移动myCopy(ori,num);turnClockwise(2);if(!moveLeft()) {//无法向右移动myCopy(ori,num);turnClockwise(1);if(!moveLeft()) {//无法向下移动myCopy(ori,num);return false;}}}}filled=tmp;score=temp;myCopy(ori,num);return true;}private void display() {//将数字与JLabel对应for(int i=0;i<MAXN;++i)for(int j=0;j<MAXN;++j) {jlb[i][j].setText(Integer.toString(num[i][j]));jlb[i][j].setBackground(getBkgColor(num[i][j]));jlb[i][j].setForeground(getFrgColor(num[i][j]));}}private boolean moveLeft() {//按下左箭头时，内部矩阵的计算boolean moved=false;for(int r=0;r<MAXN;++r)if(moveRow(r))moved=true;return moved;}private boolean moveRow(int r) {//按下左箭头时，内部矩阵第r行的计算boolean moved=fillUp(r);for(int c=1;c<MAXN;++c) {//合并if(num[r][c]==num[r][c-1]&&num[r][c]!=0) {--filled;moved=true;num[r][c-1]<<=1;num[r][c]=0;score+=num[r][c-1];}}return fillUp(r)||moved;}private boolean fillUp(int r) {//当前行向左移动int c=0,t;boolean moved=false;while(c<MAXN&&num[r][c]!=0)//找到第一个空位++c;t=c;for(;t<MAXN;++t) {//补齐空位if(num[r][t]!=0) {moved=true;num[r][c++]=num[r][t];}}for(;c<MAXN;++c)if(num[r][c]!=0) {//若c~MAXN-1存在非0方块，则必定产生移动moved=true;num[r][c]=0;}return moved;}private void next() {//填入一个方块2或4++filled;int r=((int)(Math.random()*MAXN))%MAXN,c=((int)(Math.random()*MAXN))%MAXN,n=((int)(Math.random()*2))%2;while(num[r][c]!=0) {r=((int)(Math.random()*MAXN))%MAXN;c=((int)(Math.random()*MAXN))%MAXN;}num[r][c]=2<<n;}private void turnClockwise(int times) {//将矩阵顺时针旋转times*90°times%=4;while((times--)>0) {int tmp[][]=new int[MAXN][MAXN],r,c,t;myCopy(num,tmp);for(r=0;r<MAXN;++r)//顺时针旋转90°for(c=0,t=MAXN-1;c<MAXN;++c,--t)num[r][c]=tmp[t][r];}}private void myCopy(int[][] src,int[][] dest) {for(int r=0;r<MAXN;++r)for(int c=0;c<MAXN;++c)dest[r][c]=src[r][c];}private Color getBkgColor(int num) {switch(num) {case 0:return new Color(205,193,180);case 2:return new Color(238,228,218);case 4:return new Color(224,237,200);case 8:return new Color(242,117,121);case 16:return new Color(249,149,99);case 32:return new Color(246,124,95);case 64:return new Color(246,94,59);case 128:return new Color(237,217,114);case 256:return new Color(237,204,97);case 512:  return new Color(236,176,77);   case 1024:  return new Color(236,148,55);case 2048:  return new Color(236,120,33);}return new Color(236,120,33);}private Color getFrgColor(int num) {switch(num) {case 0:return new Color(205,193,180);case 2:case 4:return new Color(119,110,101);case 8:case 16:case 32:case 64:case 128:case 256:return new Color(249,246,242);}return new Color(0,0,0);}public static void main(String[] argv) {new Game();}}