Tank war is a classic game in the era of red and white computers when we were young , See a lot of small partners are using a variety of languages to achieve a bit , Hand itch , Also used java Do a relatively simple tank war , Mainly for those who have learned Java The crowd , With someone who's been learning for a while , It is conducive to the improvement of object-oriented thinking , I recommend it to you .

Please refer to the note for details , There's no more nonsense here , It's just a childhood classic .

Blood.java

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package com.hkm.TankWar;
import java.awt.*;
/**
  * Blood clots , Our tanks can recover blood after eating ;
  * @author Hekangmin
  *
  */
public class Blood {
   private int x,y,w,h; // The location, width and height of the clot ;
    
   private TankWarClient tc;
    
   private int step= 0 ; // Record the number of steps the clot moves ;
    
   private boolean live= true ;
   public boolean isLive() {
     return live;
   }
  
   public void setLive( boolean live) {
     this .live = live;
   }
     /**
      * Record the location of the clot ;
      */
   private int [][] pos={{ 400 , 300 },{ 400 , 320 },{ 420 , 320 },{ 440 , 300 },{ 440 , 330 },{ 480 , 400 },{ 520 , 400 },{ 540 , 400 }};
         
   public Blood()
   {
     x=pos[ 0 ][ 0 ];
     y=pos[ 0 ][ 1 ];
     w=h= 18 ;
   }
    
   public void draw(Graphics g)
   {
     if (!live) return ;
      
     Color c=g.getColor();
     g.setColor(Color.CYAN);
     g.fillOval(x, y, w, h);
     g.setColor(c);
      
     move();
   }
   /**
    * Moving blood clots
    */
   public void move()
   {
     step++;
     if (step>=pos.length) step= 0 ;
     else {
     x=pos[step][ 0 ];
     y=pos[step][ 1 ];
     }
   }
    
    
   public Rectangle getRect()
   {
     return new Rectangle(x,y,w,h);
   }
    
    
}

Explode.java

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package com.hkm.TankWar;
import java.awt.*;
/**
  * Explosion
  * @author Hekangmin
  *
  */
public class Explode {
   private int x,y; // The location of the explosion
    
   private boolean Live= true ;
    
   int dia[]={ 4 , 8 , 12 , 16 , 32 , 40 , 20 , 14 , 4 }; // Use garden simulation , Represents the diameter of the circle ;
    
   int step= 0 ; // The difference moves to the diameter
    
   private TankWarClient tc; // Hold quotes
    
   public Explode( int x, int y,TankWarClient tc)
   {
     this .x=x;
     this .y=y;
     this .tc=tc;
   }
   public void draw(Graphics g)
   {
     if (!Live)
     {
       tc.explodes.remove( this );
       return ;
     }
     if (step==dia.length) // If it goes to the last diameter, it explodes and dies ;
     {
       Live= false ;
       step= 0 ;
       return ;
     }
     Color c=g.getColor();
     g.setColor(Color.YELLOW);
     g.fillOval(x, y, dia[step], dia[step]);
     g.setColor(c);
     step++;
   }
    
}

Missile.java

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package com.hkm.TankWar;
import java.awt.*;
import java.awt.Event.*;
import java.awt.event.KeyEvent;
import java.util.List;
/**
  * Bullets
  * @author Hekangmin
  *
  */
  public class Missile {
     private int x,y; // The location of the bullet
     private Tank.Direction dir; // Tank direction
      
     private static final int XSPEED= 10 ; // tanks x The speed of movement in the direction ,
     private static final int YSPEED= 10 ; // tanks y The speed of movement in the direction ,
      
     public static final int WIDTH= 10 ;
     public static final int HEIGHT= 10 ;
      
     private boolean Live= true ; // Judge whether the bullet is alive
      
     private boolean good; // Distinguish between enemy bullets and our bullets
      
     private TankWarClient tc;
      
   public Missile( int x, int y, Tank.Direction dir) {
     this .x = x;
     this .y = y;
     this .dir = dir;
   }
    
   public Missile( int x, int y, boolean good,Tank.Direction dir,TankWarClient tc)
   {
     this (x,y,dir);
     this .good=good; // Set the tank's good or bad attribute and bullet's bad attribute to the same ;
     this .tc=tc;
   }
    
   /**
    * Draw the bullet
    * @param g For the brush
    */
   public void draw(Graphics g)
   {
     if (!Live)
       {
       tc.missiles.remove( this );
       return ;
       }
     Color c=g.getColor();
     if (good)
     {
       g.setColor(Color.BLUE);
     }
     else g.setColor(Color.ORANGE);
     g.fillOval(x, y, WIDTH, HEIGHT);
     g.setColor(c);
      
     move();
   }
    
   /**
    * Move the bullets according to the direction of the tank
    */
   private void move() {
     switch (dir)
     {
     case L:
       x-=XSPEED;
       break ;
     case LU:
       x-=XSPEED;
       y-=YSPEED;
       break ;
     case U:
       y-=YSPEED;
       break ;
     case RU:
       x+=XSPEED;
       y-=YSPEED;
       break ;
     case R:
       x+=XSPEED;
       break ;
     case RD:
       x+=XSPEED;
       y+=YSPEED;
       break ;
     case D:
       y+=YSPEED;
       break ;
     case LD:
       x-=XSPEED;
       y+=YSPEED;
       break ;
     }
      
     if (x< 0 ||y< 0 ||x>TankWarClient.GAME_WIDTH||y>TankWarClient.GAME_HEIGHT) // If the bullet crosses the line, it will kill him ;
     {
       Live= false ;
     }
   }
    
    
   public boolean isLive()
   {
     return Live;
   }
  
   public Rectangle getRect() // Get the rectangular area of the bullet ;
   {
     return new Rectangle( this .x, this .y, this .WIDTH, this .HEIGHT);
   }
    
   /**
    * Judge whether the bullet collides with the tank ;
    * @param t For tanks
    * @return return true It means that there is a collision , Otherwise there is no collision ;
    */
   public boolean hitTank(Tank t)
   {
     if ( this .Live&& this .getRect().intersects(t.getRect())&&t.isLive()&& this .good!=t.isGood())
     {
       if (t.isGood())
       {
         t.setLife(t.getLife()- 10 );
         if (t.getLife()<= 0 ) t.setLive( false );
       } else {
         t.setLive( false );
       }
       this .Live= false ; /// Set the bullet to death ;
       Explode e= new Explode(x,y,tc); // Explosion ;
       tc.explodes.add(e);
       return true ;
        
     }
     return false ;
   }
   /**
    * Judge whether the bullet collided with the enemy tank ;
    * @param tanks Enemy tanks
    * @returntrue It means a collision ,false There was no collision ;
    */
   public boolean hitTanks(List<Tank> tanks)
   {
     for ( int i= 0 ;i<tanks.size();i++)
     {
       if (hitTank(tc.tanks.get(i)))
       {
         return true ;
       }
     }
      
     return false ;
   }
    
   /**
    * Judge whether the bullet hit the wall
    * @param w wall
    * @returntrue, Hit ,false, Didn't hit ;
    */
   public boolean hitsWall(Wall w)
   {
     if ( this .Live&& this .getRect().intersects(w.getRect()))
     {
       Live= false ;
       return true ;
     }
     return false ;
   }
    
    
}

Tank.java

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package com.hkm.TankWar;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.util.*;
/**
  * Tanks
  * @author Hekangmin
  *
  */
public class Tank {
   public static final int XSPEED= 5 ; // tanks x Direction speed
   public static final int YSPEED= 5 ;
    
   public static final int WIDTH= 30 ;
   public static final int HEIGHT= 30 ;
    
   private BloodBar bb= new BloodBar(); // Blood strip
    
   private int life= 100 ;
    
   public int getLife() {
     return life;
   }
  
   public void setLife( int life) {
     this .life = life;
   }
  
  
   private static Random r= new Random();
    
   private static int step=r.nextInt( 12 )+ 3 ; // Define a number to represent the random steps of enemy tanks ;
    
   private boolean bL= false ,bU= false ,bR= false ,bD= false ;
    
   enum Direction{L,LU,U,RU,R,RD,D,LD,STOP}; // Use enumeration types to define the direction of the tank ;
   private int x,y;
    
   private int oldX,oldY; // Record the position of the last tank ;
    
   private boolean live= true ; // Judge if you're alive
    
   public boolean isLive() {
     return live;
   }
  
   public void setLive( boolean live) {
     this .live = live;
   }
  
  
   private boolean good; // Tanks are good or bad
    
   public boolean isGood() {
     return good;
   }
  
  
   private Direction ptDir=Direction.D; // The direction of the new barrel ;
    
   TankWarClient tc; // In order to hold the reference of the other party so that its member variables can be easily accessed ;
    
   Direction dir=Direction.STOP; // Set the direction of the tank to stop;
    
    
    
   public Tank( int x, int y, boolean good,Direction dir,TankWarClient tc)
   {
     this .x=x;
     this .y=y;
     this .oldX=x;
     this .oldY=y;
     this .good=good;
     this .dir=dir;
     this .tc=tc; // Hold the other party's reference ;
   }
    
    
   public void draw(Graphics g)
   {
     if (!live) // If you die, no more draw;
     { 
       if (!good)
       {
         tc.tanks.remove( this );
         if (tc.tanks.size()< 5 ) // Less than 5 Add a tank when adding a tank ;
         {
           for ( int i= 0 ;i< 10 ;i++)
           {
             int posX=r.nextInt( 800 );
             int posY=r.nextInt( 600 );
             tc.tanks.add( new Tank(posX,posY, false ,Direction.D,tc)); // Make the tanks appear in random positions
           }
         }
       }
        
       return ;
     }
      
     Color c=g.getColor();
     if (good)
     {
       g.setColor(Color.RED);
       bb.draw(g);
     }
     else g.setColor(Color.BLACK);
     g.fillOval(x, y, WIDTH, HEIGHT);
     g.setColor(c);
      
     switch (ptDir) // Draw the direction of the barrel ;
     {
     case L:
        g.drawLine(x+Tank.WIDTH/ 2 , y+Tank.HEIGHT/ 2 , x- 10 , y+Tank.HEIGHT/ 2 ); // Draw the gun barrel , Draw a straight line instead of ;
       break ;
     case LU:
        g.drawLine(x+Tank.WIDTH/ 2 , y+Tank.HEIGHT/ 2 , x- 7 , y- 7 );
       break ;
     case U:
        g.drawLine(x+Tank.WIDTH/ 2 , y+Tank.HEIGHT/ 2 , x+Tank.WIDTH/ 2 , y- 10 );
       break ;
     case RU:
        g.drawLine(x+Tank.WIDTH/ 2 , y+Tank.HEIGHT/ 2 , x+Tank.WIDTH+ 7 , y- 7 );
       break ;
     case R:
        g.drawLine(x+Tank.WIDTH/ 2 , y+Tank.HEIGHT/ 2 , x+Tank.WIDTH+ 10 , y+Tank.HEIGHT/ 2 );
       break ;
     case RD:
        g.drawLine(x+Tank.WIDTH/ 2 , y+Tank.HEIGHT/ 2 , x+Tank.WIDTH+ 7 , y+Tank.HEIGHT+ 7 );
       break ;
     case D:
        g.drawLine(x+Tank.WIDTH/ 2 , y+Tank.HEIGHT/ 2 , x+Tank.WIDTH/ 2 , y+Tank.HEIGHT+ 10 );
       break ;
     case LD:
        g.drawLine(x+Tank.WIDTH/ 2 , y+Tank.HEIGHT/ 2 , x- 7 , y+HEIGHT+ 7 );
       break ;
     }
     move();
   }
    
    
   public void move()
   {
     oldX=x; // Record the position of the last step of the tank
     oldY=y;
      
     switch (dir)
     {
     case L:
       x-=XSPEED;
       break ;
     case LU:
       x-=XSPEED;
       y-=YSPEED;
       break ;
     case U:
       y-=YSPEED;
       break ;
     case RU:
       x+=XSPEED;
       y-=YSPEED;
       break ;
     case R:
       x+=XSPEED;
       break ;
     case RD:
       x+=XSPEED;
       y+=YSPEED;
       break ;
     case D:
       y+=YSPEED;
       break ;
     case LD:
       x-=XSPEED;
       y+=YSPEED;
       break ;
     case STOP:
       break ;
     }
     if ( this .dir!=Direction.STOP)
       this .ptDir= this .dir;
      
     /**
      * Prevent tanks from crossing the border ;
      */
     if (x< 0 ) x= 0 ;
     if (y< 25 ) y= 25 ;
     if (x+Tank.WIDTH>TankWarClient.GAME_WIDTH) x=TankWarClient.GAME_WIDTH- 30 ;
     if (y+Tank.HEIGHT>TankWarClient.GAME_HEIGHT) y=TankWarClient.GAME_HEIGHT- 30 ;
      
     if (!good)
     {
       Direction[] dirs=Direction.values(); // Convert enumeration types to arrays ;
        
       if (step== 0 )
       {
         step=r.nextInt( 12 )+ 3 ;
         int rn=r.nextInt(dirs.length); // produce length Random integers within ;
         dir=dirs[rn];
       }
       step--;
       if (r.nextInt( 40 )> 20 ) this .fire(); // Make enemy tanks fire bullets ;
     }
      
   }
    
   /**
    * Processing keys
    * @param e Keyboard events ;
    */
   public void KeyPressed(KeyEvent e)
   {
     int key=e.getKeyCode();
     switch (key)
     {
      
     case KeyEvent.VK_LEFT:
       bL= true ;
       break ;
     case KeyEvent.VK_RIGHT:
       bR= true ;
       break ;
     case KeyEvent.VK_UP:
       bU= true ;
        break ;
     case KeyEvent.VK_DOWN:
       bD= true ;
       break ;
     }
     locationDir();
   }
    
    
   public void keyReleased(KeyEvent e) {
     int key=e.getKeyCode();
     switch (key)
     {
     case KeyEvent.VK_CONTROL:
       fire();
       break ;
     case KeyEvent.VK_LEFT:
       bL= false ;
       break ;
     case KeyEvent.VK_RIGHT:
       bR= false ;
       break ;
     case KeyEvent.VK_UP:
       bU= false ;
        break ;
     case KeyEvent.VK_DOWN:
       bD= false ;
       break ;
     case KeyEvent.VK_A:
       superFire();
       break ;
     case KeyEvent.VK_F2:
       reBorn();
       break ;
     }
     locationDir();
   }
    
   /**
    * bullets
    * @return Returns the bullet type
    */
   public Missile fire() {
     if (!live)
       return null ;
     int mx= this .x+Tank.WIDTH/ 2 -Missile.WIDTH/ 2 ; // Calculate the location of the bullet ;
     int my= this .y+Tank.HEIGHT/ 2 -Missile.HEIGHT/ 2 ;
     Missile m= new Missile(mx,my,good,ptDir, this .tc); //// Fire bullets in the direction of the barrel
     tc.missiles.add(m);
     return m;
   }
    
    
   public Missile fire(Direction dir)
   {
     if (!live)
       return null ;
     int mx= this .x+Tank.WIDTH/ 2 -Missile.WIDTH/ 2 ;
     int my= this .y+Tank.HEIGHT/ 2 -Missile.HEIGHT/ 2 ;
     Missile m= new Missile(mx,my,good,dir, this .tc); // Fire bullets in the direction of the tank ;
     tc.missiles.add(m);
     return m;
   }
    
   public void superFire()
   {
     Direction[] dirs=Direction.values();
     for ( int i= 0 ;i< 8 ;i++)
     {
       fire(dirs[i]);
     }
   }
    
    
   public void locationDir()
   {
     if (bL&&!bU&&!bR&&!bD)
       dir=Direction.L;
     else if (bL&&bU&&!bR&&!bD)
       dir=Direction.LU;
     else if (!bL&&bU&&!bR&&!bD)
       dir=Direction.U;
     else if (!bL&&bU&&bR&&!bD)
       dir=Direction.RU;
     else if (!bL&&!bU&&bR&&!bD)
       dir=Direction.R;
     else if (!bL&&!bU&&bR&&bD)
       dir=Direction.RD;
     else if (!bL&&!bU&&!bR&&bD)
       dir=Direction.D;
     else if (bL&&!bU&&!bR&&bD)
       dir=Direction.LD;
     else if (!bL&&!bU&&!bR&&!bD)
       dir=Direction.STOP;
   }
  
    
    
   public Rectangle getRect() // obtain tank The rectangular area of
   {
     return new Rectangle( this .x, this .y, this .WIDTH, this .HEIGHT);
   }
    
   /**
    * The tank hit the wall
    * @param w wall
    * @returntrue Hit ,false Didn't hit ;
    */
   public boolean colliedsWithWall(Wall w)
   {
     if ( this .live&& this .getRect().intersects(w.getRect()))
     {
       this .stay();
       return true ;
     }
     return false ;
   }
    
   /**
    * Dealing with tank to tank collisions , Prevent them from crossing each other ;
    * @param tanks Enemy tanks ;
    * @return true Hit ,false Didn't hit ;
    */
   public boolean colliedsWithTanks(java.util.List<Tank> tanks)
   {
     for ( int i= 0 ;i<tanks.size();i++)
     {
       Tank t=tanks.get(i);
       if ( this !=t)
       {
         if ( this .live&& this .isLive()&& this .getRect().intersects(t.getRect()))
         {
           this .stay(); // Return to the previous position ;
           t.stay(); //// Return to the previous position
           return true ;
         }
          
       } 
     }
     return false ;
   }
    
  
   private void stay()
   {
     x=oldX;
     y=oldY;
   }
    
   /**
    * by Tank The inner class of ; Blood strip , On top of our tanks ;
    * @author Hekangmin
    *
    */
   private class BloodBar
   {
     public void draw(Graphics g)
     {
       Color c=g.getColor();
       g.setColor(Color.RED);
       g.drawRect(x,y- 10 ,WIDTH, 10 );
       int w=WIDTH*life/ 100 ;
       g.fillRect(x,y- 10 ,w, 10 );
     }
   }
    
   /**
    * Add blood to the blood clot ;
    * @param b clot
    * @returntrue Eat to ,false Not eating ;
    */
   public boolean eat(Blood b)
   {
     if ( this .live&&b.isLive()&& this .getRect().intersects(b.getRect()))
     {
       this .life= 100 ;
       b.setLive( false );
       return true ;
     }
     return false ;
   }
    
   /**
    * Our tanks come back to life after death ;
    */
   public void reBorn()
   {
     if ( this .isGood()&&! this .isLive())
     {
       this .setLive( true );
       this .setLife( 100 );
     }
   }
}

TankWarClient.java

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package com.hkm.TankWar;
import java.awt.*;
import java.awt.event.*;
import java.util.List;
import java.util.ArrayList;
  
/**
  * This is the running window of the game ;
  * @author Hekangmin
  *
  */
public class TankWarClient extends Frame{
/**
  * The width of the game window ;
  */
   public static final int GAME_WIDTH= 800 ;
    
   /**
    * The height of the game window ;
    */
   public static final int GAME_HEIGHT= 600 ;
    
   Tank MyTank= new Tank( 700 , 400 , true ,Tank.Direction.STOP, this );
   List<Tank> tanks= new ArrayList<Tank>();
   List<Explode> explodes= new ArrayList<Explode>();
   List<Missile> missiles= new ArrayList<Missile>();
   Wall w1= new Wall( 300 , 200 , 20 , 200 , this );
   Wall w2= new Wall( 600 , 300 , 30 , 150 , this );
   Blood b= new Blood();
    
   /**
    * Draw a virtual picture ;
    */
   Image OffScreenImage= null ;
    
   public TankWarClient(String name) // Set text
   {
     super (name);
   }
    
   /**
    * Run window ;
    */
    
   public void launchFrame()
   {
     for ( int i= 0 ;i< 10 ;i++) // Add ten enemy tanks
     {
       tanks.add( new Tank( 50 + 40 *(i+ 1 ), 50 , false ,Tank.Direction.D, this ));
     }
      
     this .setBounds( 200 , 100 ,GAME_WIDTH,GAME_HEIGHT);
     this .setBackground(Color.GREEN);
     this .addWindowListener( new WindowAdapter() // An anonymous class
     {
       public void windowClosing(WindowEvent e)
       {
         System.exit( 0 );
       }
     });
     this .addKeyListener( new KeyMonitor()); // Add a keyboard monitor ;
     this .setResizable( false ); // You can't change the size of the window ;
      
     this .setVisible( true );
      
     new Thread( new PaintThread()).start(); // Create a new thread ;
   }
    
   public void paint(Graphics g)
   {
     g.drawString( "Missile count: " +missiles.size(), 10 , 50 ); // display string ;
     g.drawString( "Explodes count: " +explodes.size(), 10 , 70 );
     g.drawString( "tanks count: " +tanks.size(), 10 , 90 );
     g.drawString( "Mytank life: " +MyTank.getLife(), 10 , 110 );
     /**
      * Draw the wall ;
      */
     w1.draw(g);
     w2.draw(g);
      
     /**
      * Detecting bullets and all kinds of things ;
      */
     for ( int i= 0 ;i<missiles.size();i++)
     {
       Missile m=missiles.get(i);
       m.hitsWall(w1);
       m.hitsWall(w2);
       m.hitTanks(tanks);
       m.hitTank(MyTank);
       m.draw(g);
        
       //if(!m.isLive())
         //missiles.remove(m);
       //else m.draw(g);
     }
     /**
      * Draw the explosion ;
      */
     for ( int i= 0 ;i<explodes.size();i++)
     {
       Explode e=explodes.get(i);
       e.draw(g);
     }
      
     for ( int i= 0 ;i<tanks.size();i++)
     {
       Tank t=tanks.get(i);
       t.colliedsWithWall(w1);
       t.colliedsWithWall(w2);
       t.colliedsWithTanks(tanks);
       t.draw(g);
     }
      
     b.draw(g);
     MyTank.eat(b);
     MyTank.draw(g);
   }
    
   /**
    * Use double buffer technology to eliminate tank flicker ;
    */
   public void update(Graphics g) //g For the brush on the screen ;
   {
     if (OffScreenImage== null )
       OffScreenImage= this .createImage(GAME_WIDTH, GAME_HEIGHT);
     Graphics gOffScreen=OffScreenImage.getGraphics(); //gOffScreen yes OffScreenImage My brush ;
     Color c=gOffScreen.getColor();
     gOffScreen.setColor(Color.GREEN);
     gOffScreen.fillRect( 0 , 0 , GAME_WIDTH, GAME_HEIGHT);
     gOffScreen.setColor(c);
     paint(gOffScreen); // On a virtual picture ;
     g.drawImage(OffScreenImage, 0 , 0 , null ); // use g The brush draws the virtual picture on the screen
      
   }
    
    
   private class PaintThread implements Runnable{
  
     public void run() {
       while ( true )
       {
         repaint(); // there repaint The method is Frame Class
         try {
         Thread.sleep( 100 );
         } catch (InterruptedException e){
           e.printStackTrace();
         }
       }
     }
   }
    
   private class KeyMonitor extends KeyAdapter
   {
     public void keyReleased(KeyEvent e) {
       MyTank.keyReleased(e);
     }
  
     public void keyPressed(KeyEvent e) {
       MyTank.KeyPressed(e);
       }
      
      
   }
    
    
    
   public static void main(String[] args) {
     new TankWarClient( "My Tank World" ).launchFrame();
   }
    
    
    
    
}

Wall.java

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package com.hkm.TankWar;
import java.awt.*;
/**
  * Generate the obstruction wall class ;
  * @author Hekangmin
  *
  */
  
public class Wall {
   /**
    * x,y For the location of the wall ,w,h Is the width height ;
    */
   int x,y,w,h;
   /**
    * Hold quotes
    */
   TankWarClient tc;
    
   public Wall( int x, int y, int w, int h, TankWarClient tc) {
     this .x = x;
     this .y = y;
     this .w = w;
     this .h = h;
     this .tc = tc;
   }
    
   public void draw(Graphics g)
   {
     Color c=g.getColor();
     g.setColor(Color.GRAY);
     g.fillRect(x,y,w,h);
     g.setColor(c);
   }
    
   /**
    * Get the rectangular area of the wall ;
    * @return
    */
   public Rectangle getRect()
   {
     return new Rectangle(x,y,w,h);
   }
    
}

The above is the whole content of this article , I hope you like it .

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