2048小游戏（Java）（swing实现）（一）

自己写的2048小游戏，仅支持鼠标操作

主要是我不知道怎么添加键盘监听

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class JF2048 extends JFrame {

/**
     * 
     */
    private static final long serialVersionUID = 1L;

private Ja2048 ja;

public JButton b[] = {
new JButton(),
new JButton(),
new JButton(),
new JButton()
};

public JButton back = new JButton("back");

private ActionListener b0 = new ActionListener(){
public void actionPerformed(ActionEvent e){
ja.cp0();
}};

private ActionListener b1 = new ActionListener(){
public void actionPerformed(ActionEvent e){
ja.cp1();
}};

private ActionListener b2 = new ActionListener(){
public void actionPerformed(ActionEvent e){
ja.cp2();
}};

private ActionListener b3 = new ActionListener(){
public void actionPerformed(ActionEvent e){
ja.cp3();
}};

private ActionListener back1 = new ActionListener(){
public void actionPerformed(ActionEvent e){
ja.back();
}};

public JLabel[][] la ={
{new JLabel(),new JLabel(),new JLabel(),new JLabel()},
{new JLabel(),new JLabel(),new JLabel(),new JLabel()},
{new JLabel(),new JLabel(),new JLabel(),new JLabel()},
{new JLabel(),new JLabel(),new JLabel(),new JLabel()},
};


public JF2048(){

super("2048");

//this.addKeyListener(x);

b[0].setBounds(3,20,16,156);
b[1].setBounds(178,20,16,156);
b[2].setBounds(20,3,156,16);
b[3].setBounds(20,178,156,16);
back.setBounds(3,3,16,16);

b[0].addActionListener(b0);
b[1].addActionListener(b1);
b[2].addActionListener(b2);
b[3].addActionListener(b3);
back.addActionListener(back1); 


for(int i =0;i<4;i++)
for(int j =0;j<4;j++){
la[i][j].setBounds(20+40*i,20+40*j,36,36);
la[i][j].setOpaque(true);
//la[i][j].setFont(new Font("幼圆",1,24));
la[i][j].setHorizontalAlignment(SwingConstants.CENTER);
}

this.setSize(217,238);
this.add(b[0]);
this.add(b[1]);
this.add(b[2]);
this.add(b[3]);
this.add(back);
for(int i =0;i<4;i++)
for(int j =0;j<4;j++)
this.add(la[i][j]);
JLabel p = new JLabel();
p.setBackground(new Color(127,127,127));
p.setOpaque(true);
this.add(p);


}

public static void main(String[] args){
JF2048 jf = new JF2048();
jf.ja=new Ja2048(jf);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setVisible(true);
}

}

import java.awt.*;
public class Ja2048{

public static int[][] state=new int[4][4];
public static int[][] bac=new int[4][4];

private JF2048 linkF;


public Ja2048(JF2048 a){
this.linkF = a;
setNull(state,getRandom());
setNull(state,getRandom());
setState();
} 

public void cp0(){
boolean bool= false;
for(int i = 1;i<4;i++)
for(int j = 0;j<4;j++)
if(state[i][j]!=0&&(state[i-1][j]==0||state[i-1][j]==state[i][j]))
bool=true;
if(!bool)return;

for(int i =0;i<4;i++)
for(int j =0;j<4;j++)
bac[i][j]=state[i][j];

int[][] b = new int[4][4];
for(int j=0;j<4;j++){
int[] a ={state[0][j],state[1][j],state[2][j],state[3][j]};
b[j]=LierIntArr.drop(a);
}
setNull(b,getRandom());
int[][] x=new int[4][4];
for(int i=0;i<4;i++)
for(int j=0;j<4;j++)
x[i][j]=b[j][i];
state=x;
setState();
}//向左
public void cp1(){
boolean bool=false;
for(int i=0;i<3;i++)
for(int j=0;j<4;j++)
if(state[i][j]!=0&&(state[i+1][j]==0||state[i+1][j]==state[i][j]))
bool=true;
if(!bool)return;
bac=state;
int[][] b = new int[4][4];
for(int j=0;j<4;j++){
int[] a = {state[3][j],state[2][j],state[1][j],state[0][j]};
b[j]=LierIntArr.drop(a);
}
setNull(b,getRandom());
int[][] x=new int[4][4];
for(int i=0;i<4;i++)
for(int j=0;j<4;j++)
x[i][j]=b[j][3-i];
state=x;
setState();
}//向右
public void cp2(){
boolean bool=false;
for(int i=0;i<4;i++)
for(int j=1;j<4;j++)
if(state[i][j]!=0&&(state[i][j-1]==0||state[i][j-1]==state[i][j]))
bool=true;
if(!bool)return;
bac=state.clone();
int[][] b = new int[4][4];
for(int i=0;i<4;i++)
b[i]=LierIntArr.drop(state[i]);
setNull(b,getRandom());
state=b.clone();
setState();
}//向上
public void cp3(){
boolean bool=false;
for(int i=0;i<4;i++)
for(int j=0;j<3;j++)
if(state[i][j]!=0&&(state[i][j+1]==0||state[i][j+1]==state[i][j]))
bool=true;
if(!bool)return;
bac=state.clone();
int[][] b=new int[4][4];
for(int i=0;i<4;i++){
int[] a ={state[i][3],state[i][2],state[i][1],state[i][0]};
b[i]=LierIntArr.drop(a);
}
setNull(b,getRandom());
int[][] x=new int[4][4];
for(int i=0;i<4;i++)
for(int j=0;j<4;j++)
x[i][j]=b[i][3-j];
state=x;
setState();
}//向下
public  void back(){
state=bac.clone();
setState();
}
private void setState(){
for(int i=0;i<4;i++)
for(int j=0;j<4;j++){
if(state[i][j]==0){
linkF.la[i][j].setText("");
linkF.la[i][j].setBackground(new Color(227,227,227));
linkF.la[i][j].setForeground(new Color(0,0,0));
}
else if(state[i][j]==2){
linkF.la[i][j].setText("2");
linkF.la[i][j].setFont(new Font("幼圆",1,20));
linkF.la[i][j].setBackground(new Color(255,255,255));
linkF.la[i][j].setForeground(new Color(0,0,0));
}
else if(state[i][j]==4){
linkF.la[i][j].setText("4");
linkF.la[i][j].setFont(new Font("幼圆",1,20));
linkF.la[i][j].setBackground(new Color(127,227,127));
linkF.la[i][j].setForeground(new Color(0,0,0));
}
else if(state[i][j]==8){
linkF.la[i][j].setText("8");
linkF.la[i][j].setFont(new Font("幼圆",1,20));
linkF.la[i][j].setBackground(new Color(0,127,127));
linkF.la[i][j].setForeground(new Color(255,255,255));
}
else if(state[i][j]==16){
linkF.la[i][j].setText("16");
linkF.la[i][j].setFont(new Font("幼圆",1,20));
linkF.la[i][j].setBackground(new Color(0,255,0));
linkF.la[i][j].setForeground(new Color(255,255,255));
}
else if(state[i][j]==32){
linkF.la[i][j].setText("32");
linkF.la[i][j].setFont(new Font("幼圆",1,20));
linkF.la[i][j].setBackground(new Color(127,127,0));
linkF.la[i][j].setForeground(new Color(255,255,255));
}
else if(state[i][j]==64){
linkF.la[i][j].setText("64");
linkF.la[i][j].setFont(new Font("幼圆",1,20));
linkF.la[i][j].setBackground(new Color(255,0,0));
linkF.la[i][j].setForeground(new Color(255,255,255));
}
else if(state[i][j]==128){
linkF.la[i][j].setText("128");
linkF.la[i][j].setFont(new Font("幼圆",1,20));
linkF.la[i][j].setBackground(new Color(127,255,0));
linkF.la[i][j].setForeground(new Color(255,255,255));
}
else if(state[i][j]==256){
linkF.la[i][j].setText("256");
linkF.la[i][j].setFont(new Font("幼圆",1,20));
linkF.la[i][j].setBackground(new Color(255,255,0));
linkF.la[i][j].setForeground(new Color(0,0,0));
}
else if(state[i][j]==512){
linkF.la[i][j].setText("512");
linkF.la[i][j].setFont(new Font("幼圆",1,20));
linkF.la[i][j].setBackground(new Color(255,255,0));
linkF.la[i][j].setForeground(new Color(0,0,0));
}
else if(state[i][j]==1024){
linkF.la[i][j].setText("1024");
linkF.la[i][j].setFont(new Font("幼圆",1,16));
linkF.la[i][j].setBackground(new Color(63,63,63));
linkF.la[i][j].setForeground(new Color(255,255,255));
}
}//for循环

}//setState方法

private static int getRandom(){
int a = (int)(1000*Math.random());
if(a%10<3)
return 4;
else
return 2;
}//随机生成一个2或4，可通过调整判断条件中的数字大小来调整2和4所占的比率
/**
 * 用于在4x4二维数组中随机挑出一个值为0的元素，并将其赋值为给定整数。特殊地，若该二维数组已满，返回false。
 * @param x    该二维数组
 * @param y    给定整数
 * @return 
 */
private static boolean setNull(int[][] x,int y){
boolean bool=false;
for(int i=0;i<4;i++)
for(int j=0;j<4;j++)
if(x[i][j]==0)bool=true;
if(!bool)return false;

int a = (int)(100*Math.random());
int b = (int)(6+10*Math.random());
int c = a%b;
while(true){
for(int i=0;i<4;i++)
for(int j=0;j<4;j++){
if(x[i][j]==0&&c<=0){
x[i][j]=y;
return true;
}
else if(x[i][j]==0&&c>0)
c--;
i=(i==4?0:i);
j=(j==4?0:j);
}
}
}//boolean setNull(int[][],int)方法用于在4x4二维数组中随机挑出一个值为0的元素，并将其赋值为给定整数。特殊地，若该二维数组已满，返回false。


}

/**
 * 
 * @author qliujinming@qq.com 
 * 
 * @see http://www.cnblogs.com/liujinming/
 *
 */
public class LierIntArr{
/**
* 该方法用于接受一个整数数组，对该数组进行drop操作后返回
* 示例：接受 2 0 2 0 5 5，返回4 10 0 0 0 0
* @param 需要进行drop操作的数组
* @return drop操作之后的数组
*/
public static int[] drop(int[] a){
int b = a.length;
if(b<=1)return a;
int[] c = new int[b];
int j=0;
for(int i=0;i<b;i++){
if(c[j]==0&&a[i]!=0)
c[j]=a[i];
else if(c[j]!=0&&a[i]==c[j]){
c[j]=2*a[i];
j++;
}
else if(a[i]!=0&&c[j]!=0&&a[i]!=c[j]){
j++;
c[j]=a[i];
}
}
return c;
}
//该方法用于接受一个整数数组，对该数组进行drop操作后返回
//示例：接受 2 0 2 0 5 5，返回4 10 0 0 0 0

public static void main(String[] args){
int[] a = {0,2,0,2,4,0,0,4,2,0,2,5,5,0,10};
int[] b = drop(a);
for(int i = 0;i<b.length;i++)
System.out.print(b[i]+",");
}
//输出结果：4，8，4，10，10，0，0，0，0，0，0，0，0，0，0，

}

这里的实现了键盘监听