Snake games

The main class

package GluttonousSnake;

import javax.swing.*;

// The main startup class of the game 
public class StartGame {
    
    public static void main(String[] args) {
    
        JFrame frame =new JFrame();

        frame.add(new GamePanel());

       frame.setVisible(true);
       frame.setResizable(false);  // Window size is immutable 
        frame.setBounds(10,10,920,720);
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

}

The main content of the game

1, Defining data
2, Initialization data
3, Draw it with a brush
4, Event monitoring , Keyboard monitor

package GluttonousSnake;

import javafx.scene.input.KeyCode;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Random;

// Game panels 
public class GamePanel extends JPanel implements KeyListener , ActionListener {
    
    // Drawing panels 
Container container=new Container();

// The current state of the game ： Start , stop it 
    boolean start=false; // The default is not to start 

    boolean Fail=false;// Game failure state 
    // Timer   In Milliseconds 
    Timer timer=new Timer(100,this);//100ms Do it once 

// Constructors 
    public GamePanel() {
    
        init();
        // Get focus and keyboard events 
        this.setFocusable(true);// Get focus event 
        this.addKeyListener(this); // Get keyboard monitoring events 
        timer.start();// The timer starts when the game starts 
    }

    int length;  // The length of the snake 
        int[] snakeX=new int[600];  // Snake x coordinate  25*25
        int[] snakeY=new int[500];  // Snake y coordinate 
        String fx;
        // The coordinates of the food 
    int foodX;
    int foodY;
    Random random=new Random();

    int score;// achievement 
        // Initialization method 
        public void init(){
    
            length=3;
            snakeX[0]=100;snakeY[0]=100;  // Brain coordinates 
            snakeX[1]=70;snakeY[1]=100;  // The first body coordinate 
            snakeX[2]=45;snakeY[2]=100;  // The second body coordinate 
            fx="R";// The initial direction is right 
            // Distribute things randomly on the interface 
            foodX=25+25*random.nextInt(34);
            foodY=75+25*random.nextInt(24);
            score=0;
        }
    // Everything in the game is painted by this 
    @Override
    protected void paintComponent(Graphics g) {
    
        super.paintComponent(g);  // Clear the screen 
        // Drawing static panels 
        this.setBackground(Color.white);

        Data.header.paintIcon(this,g,25,11);// Head billboard 
        g.fillRect(25,75,850,600); // Default game interface 

        // Draw points 
        g.setColor(Color.WHITE);
        g.setFont(new Font(" Microsoft YaHei ",Font.BOLD,18));// Set the font 
        g.drawString(" length "+length,750,35);
        g.drawString(" fraction "+score,750,50);
        // Painting food 
        Data.food.paintIcon(this,g,foodX,foodY);
        // Draw the snake 
        if(fx.equals("R")){
    
            Data.d.paintIcon(this,g,snakeX[0],snakeY[0]); // Snake head , We need to judge by direction 
        }else if(fx.equals("L")){
    
            Data.a.paintIcon(this,g,snakeX[0],snakeY[0]); // Snake head 
        }else if(fx.equals("U")){
    
            Data.w.paintIcon(this,g,snakeX[0],snakeY[0]); // Snake head initialization up 
        }else if(fx.equals("D")){
    
            Data.s.paintIcon(this,g,snakeX[0],snakeY[0]); // Snake head initialization down 
        }
        for (int i = 1; i < length; i++) {
    
            Data.q.paintIcon(this,g,snakeX[i],snakeY[i]); // The first body coordinate 
        }

        // Game status 
        if(start==false){
    
            g.setColor(Color.white);
            g.setFont(new Font(" Microsoft YaHei ",Font.BOLD,40));// Set the font 
            g.drawString(" Press the space to start the game ",300,300);
        }
        if(Fail){
    
            g.setColor(Color.RED);
            g.setFont(new Font(" Microsoft YaHei ",Font.BOLD,40));// Set the font 
            g.drawString(" The game failed , Press the space to start over ",300,300);
        }
    }
    @Override
    public void keyTyped(KeyEvent e) {
    

    }
// Keyboard monitoring events 
    @Override
    public void keyPressed(KeyEvent e) {
    
        int keyCode = e.getKeyCode();// Which one to get the keys of the keyboard 

        if(keyCode==KeyEvent.VK_SPACE){
    // If you press the space-time grid key 
           if(Fail){
    
               // restart 
               Fail=false;
               init();
           }else{
    
               start=!start;
           }
           repaint();
        }
        // Snake moving 
        if(keyCode==KeyEvent.VK_UP&&fx!="D"){
    
            fx="U";
        }else if(keyCode==KeyEvent.VK_DOWN&&fx!="U"){
    
            fx="D";
        }else if(keyCode==KeyEvent.VK_LEFT&&fx!="R"){
    
            fx="L";
        }else if(keyCode==KeyEvent.VK_RIGHT&&fx!="L"){
    
            fx="R";
        }
    }
// Event monitoring --- Need to refresh through fixed events ,1s--10 Time 
    @Override
    public void actionPerformed(ActionEvent e) {
    

            if(start&&Fail==false){
    // If the game is starting , Let the snake move 
                // Eat food 
                if(snakeX[0]==foodX&&snakeY[0]==foodY){
    
                    length++;// length +1
                    score=score+10; // Add... For every score you eat 10
                    // Regenerate food 
                    foodX=25+25*random.nextInt(34);
                    foodY=75+25*random.nextInt(24);
                }

                // Move right 
                for (int i = length-1; i >0; i--) {
    
                    snakeX[i]=snakeX[i-1];// Move one... Forward 
                    snakeY[i]=snakeY[i-1];// The next section moves to the position of the previous one 
                }
                // trend 
                if(fx.equals("R")){
    
                    snakeX[0]=snakeX[0]+25;
                    // Boundary judgment 
                    if(snakeX[0]>850){
     snakeX[0]=25;
                    }
                }else if(fx.equals("L")){
    
                    snakeX[0]=snakeX[0]-25;
                    // Boundary judgment 
                    if(snakeX[0]<25){
     snakeX[0]=850;
                    }
                }else if(fx.equals("U")){
    
                    snakeY[0]=snakeY[0]-25;
                    if(snakeY[0]<75){
     snakeY[0]=650;
                    }
                }else if(fx.equals("D")){
    
                    snakeY[0]=snakeY[0]+25;
                    if(snakeY[0]>650){
     snakeY[0]=75;
                    }
                }
                // Failure judgment , Hit yourself 
                for (int i = 1; i < length; i++) {
    
                    if(snakeX[0]==snakeX[i]&&snakeY[0]==snakeY[i]){
    
                        Fail=true;
                    }
                }
                repaint();// Redraw the interface 
            }
            timer.start();// The timer is on 
    }

    @Override
    public void keyReleased(KeyEvent e) {
    

    }
}

Data class

package GluttonousSnake;

import javax.swing.*;
import java.net.URL;

// Data Center 
public class Data {
    
    // Relative paths ：tx.jpg
    // Absolute path ：/fj.jpg / Equivalent to the current directory 
    private static URL headerURL=Data.class.getResource("header.jpg");
    public static ImageIcon header=new ImageIcon(headerURL);

    private static URL UpURL=Data.class.getResource("Up.jpg");
    public static ImageIcon w=new ImageIcon(UpURL);
    private static URL downURL=Data.class.getResource("Down.jpg");
    public static ImageIcon s=new ImageIcon(downURL);
    private static URL leftURL=Data.class.getResource("Left.jpg");
    public static ImageIcon a=new ImageIcon(leftURL);
    private static URL rightURL=Data.class.getResource("Right.jpg");
    public static ImageIcon d=new ImageIcon(rightURL);

    private static URL bodyURL=Data.class.getResource("body.png");
    public static ImageIcon q=new ImageIcon(bodyURL);

    private static URL foodURL=Data.class.getResource("food.jpg");
    public static ImageIcon food=new ImageIcon(foodURL);



}