Java非递归实现迷宫问题

Posted 2020-10-24 妄想症T

　　这个题目是本人的一次课程设计，也是我第一次独立做完的一个小玩意，说实话，昨晚的那一刻很有成就感。整个人开心到在自习室蹦起来。因为之前一直是自学的Java，从没有自己做过任何一个项目，这一个课程设计就花费了我三天的时间，其实应该是两天半，两天半我做出来之后和室友去炫耀，老哥看完说一句，要是把之前的路堵死，从新换一条路呢。然后就炸了。。。。。。。。。。。。。。。在做完之后我也只开心了三秒，因为兴奋之后确实无尽的空虚，不知道该向谁去分享自己的这个成就，单身狗伤不起啊。话不多说，直接上代码

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　     界面构造部分
　　　　　　　　　　　　

package 迷宫问题;

import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class MyFrame extends JFrame {
private int FIELDSIZE = 50;
public JLabel[][] labs;

public MyFrame() {
setTitle("迷宫问题");
// setName("test");
setBounds(400, 200, 800, 850);
setResizable(false);
JPanel boardPane = new JPanel();
boardPane.setLayout(null);
add(boardPane);
labs = new JLabel[16][16];
for (int x = 0; x < 16; x++) {
for (int y = 0; y < 16; y++) {
JLabel backgroundLabel = new JLabel();
backgroundLabel.setOpaque(true);
backgroundLabel.setBounds(x * FIELDSIZE, y * FIELDSIZE, FIELDSIZE, FIELDSIZE);
boardPane.add(backgroundLabel, new Integer(1), 0);
labs[x][y] = backgroundLabel;
}
}
setColor(labs);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
}

private void setColor(JLabel[][] labs) {

for (int x = 0; x < 16; x++) {
for (int y = 0; y < 16; y++) {
if (x == 0) {
labs[x][y].setBackground(Color.BLACK);
}
}
}
for (int x = 0; x < 16; x++) {
for (int y = 0; y < 16; y++) {
if (x == 15) {
labs[x][y].setBackground(Color.BLACK);
}
}
}
for (int x = 0; x < 16; x++) {
for (int y = 0; y < 16; y++) {
if (y == 0) {
labs[x][y].setBackground(Color.BLACK);
}
}
}
for (int x = 0; x < 16; x++) {
for (int y = 0; y < 16; y++) {
if (y == 15) {
labs[x][y].setBackground(Color.BLACK);
}
}
}

for (int y = 0; y < 8; y++) {
labs[2][y].setBackground(Color.BLACK);
}

for (int y = 9;y < 15; y++) {
labs[2][y].setBackground(Color.BLACK);
}
for (int x= 3; x < 7;x++) {
labs[x][7].setBackground(Color.BLACK);
}
for (int x= 6; x < 12;x++) {
labs[x][4].setBackground(Color.BLACK);
}
labs[6][9].setBackground(Color.BLACK);
labs[6][10].setBackground(Color.BLACK);
for (int x= 3; x < 10;x++) {
labs[x][10].setBackground(Color.BLACK);
}
for (int x= 4; x < 11;x++) {
labs[x][13].setBackground(Color.BLACK);
}
labs[8][15].setBackground(Color.BLACK);
for (int y = 2;y < 4; y++) {
labs[11][y].setBackground(Color.BLACK);
}
for (int y = 6;y < 14; y++) {
labs[11][y].setBackground(Color.BLACK);
}
for (int y = 7;y < 14; y++) {
labs[13][y].setBackground(Color.BLACK);
}
labs[1][1].setBackground(Color.RED);
labs[14][14].setBackground(Color.GREEN);
labs[9][6].setBackground(Color.black);
labs[9][5].setBackground(Color.black);
labs[13][1].setBackground(Color.black);
labs[13][2].setBackground(Color.black);
labs[13][3].setBackground(Color.black);
labs[14][3].setBackground(Color.black);
labs[14][4].setBackground(Color.black);
labs[11][5].setBackground(Color.black);
// labs[14][5].setBackground(Color.black);
labs[12][13].setBackground(Color.black);
//labs[3][13].setBackground(Color.black);
labs[14][6].setBackground(Color.black);
}//构造界面

public static void main(String[] args) {
MyFrame myFrame = new MyFrame();

}

分析：

红色为入口，绿色为出口。当访问至绿色，程序结束。

}

自己实现栈的定义，因为我们的课程设计不允许直接调用API

package 迷宫问题;
public class MyStack_Text {
Object[] stacks;
int size;
int top;
int len;

public MyStack_Text(int size) {
super();
this.size = size;
this.stacks = new Object[this.size];
this.top = -1;
}

public Object peek() {
return this.stacks[top];
}

public boolean empty() {
return top == (-1);
}

public boolean isFull() {
return top == (size - 1);
}

public void push(Object value) {
len++;
stacks[++this.top] = value;
}

public Object pop() {
len--;
return stacks[this.top--];
}

public int len() {
return this.len;
}

}

核心算法部分

分析：不用分析，就是基础的数据结构栈的构建

package 迷宫问题;

import java.awt.Color;
import java.util.Stack;
import java.util.TimerTask;

import javax.swing.JLabel;
public class Run extends TimerTask{
// Stack<JLabel> stack = new Stack<JLabel>();//不愿意定义栈，可以在此调用

Run(){
}
MyFrame myFrame = new MyFrame();
MyStack_Text stack=new MyStack_Text(100);
public void run(){
int i=1,j=1;
stack.push(myFrame.labs[1][1]);
while(!stack.empty()||myFrame.labs[i][j].getBackground() != Color.GREEN){
//��
while(myFrame.labs[i][j-1].getBackground() != Color.BLACK &&myFrame.labs[i][j].getBackground() != Color.GREEN&& myFrame.labs[i][j-1].getBackground() != Color.yellow&& myFrame.labs[i][j-1].getBackground() != Color.RED&& myFrame.labs[i][j-1].getBackground() != Color.pink){
if (myFrame.labs[i][--j].getBackground() != Color.GREEN)
try{
Thread.sleep(100);
}
catch(InterruptedException e){
e.printStackTrace();
}
myFrame.labs[i][j].setBackground(Color.yellow);


stack.push(myFrame.labs[i][j]);

}

//��
while(myFrame.labs[i][j+1].getBackground() != Color.BLACK&&myFrame.labs[i][1+j].getBackground() != Color.GREEN && myFrame.labs[i][j+1].getBackground() != Color.yellow&& myFrame.labs[i][j+1].getBackground() != Color.RED&& myFrame.labs[i][j+1].getBackground() != Color.pink){
if (myFrame.labs[i][++j].getBackground() != Color.GREEN){
myFrame.labs[i][j].setBackground(Color.yellow);
try{
Thread.sleep(100);
}
catch(InterruptedException e){
e.printStackTrace();
}

stack.push(myFrame.labs[i][j]);

}
}

//��
while(myFrame.labs[i-1][j].getBackground() != Color.BLACK &&myFrame.labs[i][j].getBackground() != Color.GREEN&& myFrame.labs[i-1][j].getBackground() != Color.yellow&& myFrame.labs[i-1][j].getBackground() != Color.RED&& myFrame.labs[i-1][j].getBackground() != Color.pink){
if (myFrame.labs[--i][j].getBackground() != Color.GREEN){
myFrame.labs[i][j].setBackground(Color.yellow);
try{
Thread.sleep(100);
}
catch(InterruptedException e){
e.printStackTrace();
}

stack.push(myFrame.labs[i][j]);

}
}

//��



while(myFrame.labs[i+1][j].getBackground() != Color.BLACK &&myFrame.labs[i][j].getBackground() != Color.GREEN&& myFrame.labs[i+1][j].getBackground() != Color.yellow&& myFrame.labs[i+1][j].getBackground() != Color.RED&& myFrame.labs[i+1][j].getBackground() != Color.pink){
if (myFrame.labs[++i][j].getBackground() != Color.GREEN){
myFrame.labs[i][j].setBackground(Color.yellow);
try{
Thread.sleep(100);
}
catch(InterruptedException e){
e.printStackTrace();
}

stack.push(myFrame.labs[i][j]);
}
}

if (myFrame.labs[i][j+1].getBackground() != Color.GREEN) {
try{
Thread.sleep(100);
}
catch(InterruptedException e){
e.printStackTrace();
}
JLabel XX= (JLabel) stack.peek();
i= XX.getX()/50;
j = XX.getY()/50;
int pp = 0;

if( myFrame.labs[i+1][j].getBackground() == Color.black||myFrame.labs[i+1][j].getBackground() == Color.pink||myFrame.labs[i+1][j].getBackground() == Color.yellow)
pp++;
if( myFrame.labs[i-1][j].getBackground() == Color.black||myFrame.labs[i-1][j].getBackground() == Color.pink||myFrame.labs[i-1][j].getBackground() == Color.yellow)
pp++;
if( myFrame.labs[i][j+1].getBackground() == Color.black||myFrame.labs[i][j+1].getBackground() == Color.pink||myFrame.labs[i][j+1].getBackground() == Color.yellow)
pp++;
if( myFrame.labs[i][j-1].getBackground() == Color.black||myFrame.labs[i][j-1].getBackground() == Color.pink||myFrame.labs[i][j-1].getBackground() == Color.yellow)
pp++;
if (myFrame.labs[i][j].getBackground() != Color.GREEN)
if(pp==4){
stack.pop();
XX.setBackground(Color.pink);
//System.out.println(i);
// System.out.println(j);
}//if

}//if

}//while

}

 

public static void main(String[] args) {
// MyFrame myFrame = new MyFrame();
Run R =new Run();
//R.run(1, 1);
R.run();

}
}

 

分析 ：此处黑色代表障碍，白色代表可以走的路径，黄色表示最终路径，而粉色则是进栈之后出栈的标记。

try{
Thread.sleep(100);
}
catch(InterruptedException e){
e.printStackTrace();
}

用到了进程的休眠，让进栈出栈能够直观的看出来

int pp = 0;

if( myFrame.labs[i+1][j].getBackground() == Color.black||myFrame.labs[i+1][j].getBackground() == Color.pink||myFrame.labs[i+1][j].getBackground() == Color.yellow)
pp++;
if( myFrame.labs[i-1][j].getBackground() == Color.black||myFrame.labs[i-1][j].getBackground() == Color.pink||myFrame.labs[i-1][j].getBackground() == Color.yellow)
pp++;
if( myFrame.labs[i][j+1].getBackground() == Color.black||myFrame.labs[i][j+1].getBackground() == Color.pink||myFrame.labs[i][j+1].getBackground() == Color.yellow)
pp++;
if( myFrame.labs[i][j-1].getBackground() == Color.black||myFrame.labs[i][j-1].getBackground() == Color.pink||myFrame.labs[i][j-1].getBackground() == Color.yellow)
pp++;
if (myFrame.labs[i][j].getBackground() != Color.GREEN)
if(pp==4){
stack.pop();
XX.setBackground(Color.pink);
//System.out.println(i);
// System.out.println(j);
}//if

这应该是本人的得意之作了，进行判断什么时候出栈。进过分析后发现，出栈是栈顶元素上下左右均不可走，即上下左右被黄色、粉色、黑色这三种颜色中的一种或几种包围了。所以，此处定义一个pp变量，在上下左右有黄色、粉色、黑色三种颜色任意几种的时候，pp++，当pp==4，即上下左右都是这三种颜色的一种或几种时，出栈。我想，我想啊，这应该是就是抽象思维的一种表现形式吧，抽象出四周环境的一致性，就行统一判断，减少了代码量。