How to draw and display maze animation in Java

一次性全部绘制出来

实现代码

import java.awt.*;
 
public class AlgoVisualizer {
 
    private static int DELAY = 200;
    private static int blockSide = 8;
 
    private MazeData data;
    private AlgoFrame frame;
 
    public AlgoVisualizer(String mazeFile){
 
        // 初始化数据
        data = new MazeData(mazeFile);
        int sceneHeight = data.N() * blockSide;
        int sceneWidth = data.M() * blockSide;
        
 
        // 初始化视图
        EventQueue.invokeLater(() -> {
            frame = new AlgoFrame("Maze Solver Visualization", sceneWidth, sceneHeight);
 
            new Thread(() -> {
                run();
            }).start();
        });
    }
 
    public void run(){
 
        setData();
    }
 
    private void setData(){
    	
		frame.render(data);
        AlgoVisHelper.pause(DELAY);	 
    	
 
    }
 
    
    public static void main(String[] args) {
 
        String mazeFile = "maze_101_101.txt";
 
        AlgoVisualizer vis = new AlgoVisualizer(mazeFile);
 
    }
}
 
 
 
 
 
 
 
 
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Scanner;
 
 
public class MazeData {
 
    public static final char ROAD = ' ';
    public static final char WALL = '#';
 
    private int N, M;
    private char[][] maze;
    
 
    public MazeData(String filename){
 
        if(filename == null)
            throw new IllegalArgumentException("Filename can not be null!");
 
        Scanner scanner = null;
        try{
            File file = new File(filename);
            if(!file.exists())
                throw new IllegalArgumentException("File " + filename + " doesn't exist");
 
            FileInputStream fis = new FileInputStream(file);
            scanner = new Scanner(new BufferedInputStream(fis), "UTF-8");
 
            // 读取第一行
            String nmline = scanner.nextLine();
            String[] nm = nmline.trim().split("\\s+");
            //System.out.print(nm[0] + ' ' + nm[1]);
 
            N = Integer.parseInt(nm[0]);
            // System.out.println("N = " + N);
            M = Integer.parseInt(nm[1]);
            // System.out.println("M = " + M);
 
            // 读取后续的N行
            maze = new char[N][M];
            for(int i = 0 ; i < N ; i ++){
                String line = scanner.nextLine();
 
                // 每行保证有M个字符
                if(line.length() != M)
                    throw new IllegalArgumentException("Maze file " + filename + " is invalid");
                for(int j = 0 ; j < M ; j ++)
                    maze[i][j] = line.charAt(j);
            }
        }
        catch(IOException e){
            e.printStackTrace();
        }
        finally {
            if(scanner != null)
                scanner.close();
        }
        
    }
 
    public int N(){ return N; }
    public int M(){ return M; }
    public char getMaze(int i, int j){
        if(!inArea(i,j))
            throw new IllegalArgumentException("i or j is out of index in getMaze!");
 
        return maze[i][j];
    }
 
    public boolean inArea(int x, int y){
        return x >= 0 && x < N && y >= 0 && y < M;
    }
 
    public void print(){
        System.out.println(N + " " + M);
        for(int i = 0 ; i < N ; i ++){
            for(int j = 0 ; j < M ; j ++)
                System.out.print(maze[i][j]);
            System.out.println();
        }
        return;
    }
 
}
 
 
 
 
 
 
 
import java.awt.*;
import java.awt.geom.Ellipse2D;
 
import java.awt.geom.Rectangle2D;
import java.lang.InterruptedException;
 
 
public class AlgoVisHelper {
 
    private AlgoVisHelper(){}
 
    public static final Color Red = new Color(0xF44336);
    public static final Color Pink = new Color(0xE91E63);
    public static final Color Purple = new Color(0x9C27B0);
    public static final Color DeepPurple = new Color(0x673AB7);
    public static final Color Indigo = new Color(0x3F51B5);
    public static final Color Blue = new Color(0x2196F3);
    public static final Color LightBlue = new Color(0x03A9F4);
    public static final Color Cyan = new Color(0x00BCD4);
    public static final Color Teal = new Color(0x009688);
    public static final Color Green = new Color(0x4CAF50);
    public static final Color LightGreen = new Color(0x8BC34A);
    public static final Color Lime = new Color(0xCDDC39);
    public static final Color Yellow = new Color(0xFFEB3B);
    public static final Color Amber = new Color(0xFFC107);
    public static final Color Orange = new Color(0xFF9800);
    public static final Color DeepOrange = new Color(0xFF5722);
    public static final Color Brown = new Color(0x795548);
    public static final Color Grey = new Color(0x9E9E9E);
    public static final Color BlueGrey = new Color(0x607D8B);
    public static final Color Black = new Color(0x000000);
    public static final Color White = new Color(0xFFFFFF);
 
 
    public static void strokeCircle(Graphics2D g, int x, int y, int r){
 
        Ellipse2D circle = new Ellipse2D.Double(x-r, y-r, 2*r, 2*r);
        g.draw(circle);
    }
 
    public static void fillCircle(Graphics2D g, int x, int y, int r){
 
        Ellipse2D circle = new Ellipse2D.Double(x-r, y-r, 2*r, 2*r);
        g.fill(circle);
    }
 
    public static void strokeRectangle(Graphics2D g, int x, int y, int w, int h){
 
        Rectangle2D rectangle = new Rectangle2D.Double(x, y, w, h);
        g.draw(rectangle);
    }
 
    public static void fillRectangle(Graphics2D g, int x, int y, int w, int h){
 
        Rectangle2D rectangle = new Rectangle2D.Double(x, y, w, h);
        g.fill(rectangle);
    }
 
    public static void setColor(Graphics2D g, Color color){
        g.setColor(color);
    }
 
    public static void setStrokeWidth(Graphics2D g, int w){
        int strokeWidth = w;
        g.setStroke(new BasicStroke(strokeWidth, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
    }
 
    public static void pause(int t) {
        try {
            Thread.sleep(t);
//            System.out.println("Dely");
        }
        catch (InterruptedException e) {
            System.out.println("Error sleeping");
        }
    }
 
}
 
 
 
 
 
import java.awt.*;
import javax.swing.*;
 
public class AlgoFrame extends JFrame{
 
    private int canvasWidth;
    private int canvasHeight;
 
    public AlgoFrame(String title, int canvasWidth, int canvasHeight){
 
        super(title);
 
        this.canvasWidth = canvasWidth;
        this.canvasHeight = canvasHeight;
 
        AlgoCanvas canvas = new AlgoCanvas();
        setContentPane(canvas);
        pack();
 
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setResizable(false);
 
        setVisible(true);
    }
 
    public AlgoFrame(String title){
 
        this(title, 1024, 768);
    }
 
    public int getCanvasWidth(){return canvasWidth;}
    public int getCanvasHeight(){return canvasHeight;}
 
    // data
    private MazeData data;
    public void render(MazeData data){
        this.data = data;
        repaint();
    }
 
    private class AlgoCanvas extends JPanel{
 
        public AlgoCanvas(){
            // 双缓存
            super(true);
        }
 
        @Override
        public void paintComponent(Graphics g) {
            super.paintComponent(g);
 
            Graphics2D g2d = (Graphics2D)g;
 
            // 抗锯齿
//            RenderingHints hints = new RenderingHints(
//                    RenderingHints.KEY_ANTIALIASING,
//                    RenderingHints.VALUE_ANTIALIAS_ON);
//            hints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
//            g2d.addRenderingHints(hints);
 
            // 具体绘制
            int w = canvasWidth/data.M();
            int h = canvasHeight/data.N();
            
           
            
 
            for(int i = 0 ; i < data.N() ; i ++ )
            {
                for(int j = 0 ; j < data.M() ; j ++){
                    if (data.getMaze(i, j) == MazeData.WALL)
                        AlgoVisHelper.setColor(g2d, AlgoVisHelper.LightBlue);
                    else
                        AlgoVisHelper.setColor(g2d, AlgoVisHelper.White);
                    
                    AlgoVisHelper.fillRectangle(g2d, j * w, i * h, w, h);
                }
            }
        }
 
        @Override
        public Dimension getPreferredSize(){
            return new Dimension(canvasWidth, canvasHeight);
        }
    }
}

一个一个的动画显示

DELAY时间不能太小，小了会绘制时出错，可能是线程出问题了？？？

import java.awt.*;
 
public class AlgoVisualizer {
 
    private static int DELAY = 10;
    private static int blockSide = 8;
 
    private MazeData data;
    private AlgoFrame frame;
 
    public AlgoVisualizer(String mazeFile){
 
        // 初始化数据
        data = new MazeData(mazeFile);
        int sceneHeight = data.N() * blockSide;
        int sceneWidth = data.M() * blockSide;
        
 
        // 初始化视图
        EventQueue.invokeLater(() -> {
            frame = new AlgoFrame("Maze Solver Visualization", sceneWidth, sceneHeight);
 
            new Thread(() -> {
                run();
            }).start();
        });
    }
 
    public void run(){
    	      
        for (int i = 0; i < data.N(); i++) {
        	
        	for (int j = 0; j < data.M(); j++) {
        		setData(i, j); 
			}
		}      
    }
 
    private void setData(int i, int j){
    	
      	data.currentN = i;
    	data.currentM = j;
  
		frame.render(data);
        AlgoVisHelper.pause(DELAY);	 
 
    }
 
    
    public static void main(String[] args) {
 
        String mazeFile = "maze_101_101.txt";
 
        AlgoVisualizer vis = new AlgoVisualizer(mazeFile);
 
    }
}
 
 
 
 
 
 
 
 
 
import java.awt.*;
 
public class AlgoVisualizer {
 
    private static int DELAY = 10;
    private static int blockSide = 8;
 
    private MazeData data;
    private AlgoFrame frame;
 
    public AlgoVisualizer(String mazeFile){
 
        // 初始化数据
        data = new MazeData(mazeFile);
        int sceneHeight = data.N() * blockSide;
        int sceneWidth = data.M() * blockSide;
        
 
        // 初始化视图
        EventQueue.invokeLater(() -> {
            frame = new AlgoFrame("Maze Solver Visualization", sceneWidth, sceneHeight);
 
            new Thread(() -> {
                run();
            }).start();
        });
    }
 
    public void run(){
    	      
        for (int i = 0; i < data.N(); i++) {
        	
        	for (int j = 0; j < data.M(); j++) {
        		setData(i, j); 
			}
		}      
    }
 
    private void setData(int i, int j){
    	
      	data.currentN = i;
    	data.currentM = j;
  
		frame.render(data);
        AlgoVisHelper.pause(DELAY);	 
 
    }
 
    
    public static void main(String[] args) {
 
        String mazeFile = "maze_101_101.txt";
 
        AlgoVisualizer vis = new AlgoVisualizer(mazeFile);
 
    }
}
 
 
 
 
 
 
 
import java.awt.*;
import javax.swing.*;
 
public class AlgoFrame extends JFrame{
 
    private int canvasWidth;
    private int canvasHeight;
 
    public AlgoFrame(String title, int canvasWidth, int canvasHeight){
 
        super(title);
 
        this.canvasWidth = canvasWidth;
        this.canvasHeight = canvasHeight;
 
        AlgoCanvas canvas = new AlgoCanvas();
        setContentPane(canvas);
        pack();
 
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setResizable(false);
 
        setVisible(true);
    }
 
    public AlgoFrame(String title){
 
        this(title, 1024, 768);
    }
 
    public int getCanvasWidth(){return canvasWidth;}
    public int getCanvasHeight(){return canvasHeight;}
 
    // data
    private MazeData data;
    public void render(MazeData data){
        this.data = data;
        repaint();
    }
 
    private class AlgoCanvas extends JPanel{
    	
        public AlgoCanvas(){
            // 双缓存
            super(true);
        }
 
        @Override
        public void paintComponent(Graphics g) {
           super.paintComponent(g);
 
            Graphics2D g2d = (Graphics2D)g;
 
            // 抗锯齿
//            RenderingHints hints = new RenderingHints(
//                    RenderingHints.KEY_ANTIALIASING,
//                    RenderingHints.VALUE_ANTIALIAS_ON);
//            hints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
//            g2d.addRenderingHints(hints);
 
            // 具体绘制
            int w = canvasWidth/data.M();
            int h = canvasHeight/data.N();
                                              
         先判断是不是已经绘制了 
            for(int n = 0; n < data.N(); n ++ )
            {
                for(int m = 0 ; m < data.M()  ; m ++){
                	     
              	  if (data.drawFinshed[n][m]) {
              		  
                      if (data.getMaze(n, m) == MazeData.WALL)
                          AlgoVisHelper.setColor(g2d, AlgoVisHelper.LightBlue);
                      else
                          AlgoVisHelper.setColor(g2d, AlgoVisHelper.White);
                                             
                      AlgoVisHelper.fillRectangle(g2d, m * w, n * h, w, h);
  				 }
                }
            }
        
            	          	  
      	      
              for(int i = data.currentN, j = 0 ; j < data.currentM + 1 ; j ++){
            	              	                         	             	
                  if (data.getMaze(i, j) == MazeData.WALL)
                      AlgoVisHelper.setColor(g2d, AlgoVisHelper.LightBlue);
                  else
                      AlgoVisHelper.setColor(g2d, AlgoVisHelper.White);
                                         
                  AlgoVisHelper.fillRectangle(g2d, j * w, i * h, w, h);
                  data.drawFinshed[i][j] = true;
              }
                               
            
            
以前一次性全部绘制显示出来
//            for(int i = 0 ; i < data.N() ; i ++ )
//            {
//                for(int j = 0 ; j < data.M() ; j ++){
//                    if (data.getMaze(i, j) == MazeData.WALL)
//                        AlgoVisHelper.setColor(g2d, AlgoVisHelper.LightBlue);
//                    else
//                        AlgoVisHelper.setColor(g2d, AlgoVisHelper.White);
//                    
//                    AlgoVisHelper.fillRectangle(g2d, j * w, i * h, w, h);
//                }
//            }
            
        }
 
        @Override
        public Dimension getPreferredSize(){
            return new Dimension(canvasWidth, canvasHeight);
        }
    }
}

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