tank.java

Simple java game showing how to handle multi-threading.

import java.awt.*;
import java.applet.*;

public class Tank extends Applet
{
	final int NORTH = 1;
	final int EAST = 2;
	final int SOUTH = 3;
	final int WEST = 4;
	int direction, moveBy;
	Color color;
	Point target;
	public int x, y, w, h;
	public int maxX=400,maxY=360,minX=0,minY=0;
	public int maxFire;	// The maximum amount of shots allowed for the tank to fire at once
	public int maxShells;	// The max number of shells allowed to be fired
	public boolean isMoving, isAlive, exploded;
	Graphics g;
	
	Tank(){
		 
	}
	
	public Tank(int xpos, int ypos, Color c, int speed, int newDirection, int maxFire){
		color = c;	
		this.x = xpos;
		this.y = ypos;
		this.direction = newDirection;
		this.moveBy = speed;
		this.isMoving = true;
		this.maxFire = maxFire;
		this.maxShells = 1000;
		this.isAlive = false;
		this.exploded = false;
	}
	
	public void move(){

		switch (direction) {
            case NORTH: if( (y-moveBy<minY) ){isMoving=false;} else { y -= moveBy;}break;
		case EAST:	if( (x+tankWidth()+moveBy)>maxX){isMoving=false;} else { x += moveBy;}break;
            case SOUTH: if( (y+tankHeight()+moveBy)>maxY ){isMoving=false;} else { y += moveBy;}break;
            case WEST:  if( (x-moveBy<minX) ){isMoving=false;} else { x -= moveBy;}break;
        }    
	}
	
	public void turn(int newDirection){
		this.direction = newDirection;
	}
	
	public void turnAround(){
		direction += 2;
		if(direction>4)direction -= 4;
	}
	
	void explode(){
		exploded = true;
	}
	
	public void paint(Graphics gr){
		
		if (!isAlive)return;
		g = gr;
		if(exploded){			
			g.setColor(new Color(255,255,100));
			g.fillOval(x,y,40,40);
			g.setColor(new Color(255,255,170));
			g.fillOval(x+5,y+5,30,30);
			g.setColor(new Color(255,255,225));
			g.fillOval(x+10,y+10,20,20);
			isAlive = false;
			isMoving = false;
			//x = -100;
			//y = -100;
			exploded = false;
			return;
		}
		
		//polygon canon wheels
		int x11[] = {0+x,35+x,35+x,25+x,25+x,10+x,10+x,0+x};
		int y11[] = {5+y,5+y,40+y,40+y,5+y,5+y,40+y,40+y};
			
		int x12[] = {0+x,35+x,35+x,0+x,0+x,35+x,35+x,0+x};
		int y12[] = {0+y,0+y,35+y,35+y,25+y,25+y,10+y,10+y};

		int x13[] = x11;
		int y13[] = {0+y,0+y,35+y,35+y,0+y,0+y,35+y,35+y};

		int x14[] = {5+x,40+x,40+x,5+x,5+x,40+x,40+x,5+x};
		int y14[] = y12;

		int x1[][] = {x11,x12,x13,x14};
		int y1[][] = {y11,y12,y13,y14};

		//roundrect canon compartment
		int x2[] = {5+x,5+x,5+x,10+x};
		int y2[] = {10+y,5+y,5+y,5+y};
			
		//rect canon case
		int x3[] = {15+x,20+x,15+x,8+x};
		int y3[] = {8+y,15+y,20+y,15+y};
		int x3w[] = {5,12,5,12};
		int y3h[] = {12,5,12,5};
	
		//oval canon cap
		int x4[] = {10+x,10+x,10+x,15+x};
		int y4[] = {15+y,10+y,10+y,10+y};
			
		//canon
		int x5[] = {16+x,30+x,16+x,0+x};
		int y5[] = {0+y,16+y,30+y,16+y};
		int x5w[] = {3,10,3,10};
		int y5h[] = {10,3,10,3};
		

				
		int d = direction - 1;
		
		//draw wheels
		g.setColor(Color.black);
		g.fillPolygon(x1[d], y1[d] ,8);
		
		//draw compartment
		g.setColor(color);
		g.fillRoundRect(x2[d],y2[d],25,25,5,5);

		//draw canon
		g.setColor(Color.black);
		g.fillRect(x5[d],y5[d],x5w[d],y5h[d]);

		
		//draw canon case
		g.setColor(new Color(47,79,79));
		g.fillRect(x3[d],y3[d],x3w[d],y3h[d]);

		//draw canon cap		
		g.setColor(Color.black);
		g.fillOval(x4[d],y4[d],15,15);
		
	}
	
	int tankWidth(){
		if(direction==1||direction==3)return 35;
		else return 40;
	}
	
	int tankHeight(){
		if(direction==2||direction==4)return 40;
		else return 35;
	}
	
}