BattleFieldTemplate2.java

package tank;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.util.concurrent.TimeUnit;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.WindowConstants;


public class BattleFieldTemplate2 extends JPanel {

	final boolean COLORDED_MODE = false;
	
	final int BF_WIDTH = 576;
	final int BF_HEIGHT = 576;

	int bulletX=-100;
	int bulletY=-100;
	int bulletSpeed = 5;
	
	int tankX = 0;
	int tankY = 0;

	int time=1;
	
	int tankDirection;
	

	String[][] battleField = {
			{"B", "B", "B", "B", "B", "B", "B", "B", "B"},
			{"B", " ", "B", "B", "B", "B", "B", " ", "B"},
			{"B", " ", " ", "B", "B", "B", " ", " ", "B"},
			{"B", "B", " ", " ", "B", " ", " ", "B", "B"},
			{"B", "B", "B", " ", " ", " ", "B", "B", "B"},
			{"B", "B", " ", " ", "B", " ", " ", "B", "B"},
			{"B", " ", " ", "B", "B", "B", " ", " ", "B"},
			{"B", " ", "B", "B", "B", "B", "B", " ", "B"},
			{"B", "B", "B", "B", "B", "B", "B", "B", "B"}};
	
	void runTheGame() throws Exception
	{	
		while(true)
		{
		    moveToQuadrant(random(),random());
		    fire();
		}	
	}
	
	void moveToQuadrant(int x,int y)throws Exception
	{
		System.out.println("x="+x+" y="+y);
		System.out.println(getQuadrantXY(x,y));
		
	   	 int x1=64*(x-1);
	   	 int y1=64*(y-1);
		
		while(tankX!=x1 || tankY!=y1)
		{
		   if(tankX<x1)
			   move(4);
		   else if(tankX>x1)
			       move(3);
			   else if(tankY<y1)
			           move(2);
		           else if(tankY>y1)
				          move(1);
		}
	}

	String getQuadrantXY(int x,int y)
	{	
		return 64*(x-1)+"_"+64*(y-1);
	}
	
	String getQuadrant(int x,int y)
	{
		return y/64+"_"+x/64;
	}

    
	void move(int direction)throws Exception
	{
		tankDirection=direction;
		
	    int i=1;
	    
		while(i<=64)
		{
		   if(direction==1 && tankY>0)
			 tankY--;
		   else
			   if(direction==2 && tankY<512)
				  tankY++;
			   else
				   if(direction==3 && tankX>0)
					  tankX--;
				   else
					   if(direction==4 && tankX<512)
						  tankX++;
		   
		   
		   repaint();
		   TimeUnit.MILLISECONDS.sleep(10);
		   i++;
		}
	}
	
	int random ()throws Exception
	{ 
   		 TimeUnit.NANOSECONDS.sleep(time++);
		 return(int)(System.nanoTime()%9+1);
	}
	
	 void fire()throws Exception
	 {
		 bulletX =tankX+25;
	     bulletY =tankY+25;
	     
	    while(true)
	    {
	     if(tankDirection==1 && bulletY>-14)
	    	   bulletY--;
	         else if(tankDirection==2 && bulletY<575 )
	    		     bulletY++;
	    	     else if(tankDirection==3 && bulletX>-14)
	    			     bulletX--;
	    		     else if(tankDirection==4 && bulletX<575)    				
		    			    bulletX++;
	    			     else break;
	         repaint();
    	         processInterception();
		 TimeUnit.MILLISECONDS.sleep(bulletSpeed);
	    }
	  }
	 boolean processInterception()
	 { 
		 int v=Integer.valueOf(getQuadrant(bulletX,bulletY).substring(0,1));
		 int h=Integer.valueOf(getQuadrant(bulletX,bulletY).substring(2));
		 
		 if(v>=0 && v<9 && h>=0 && h<9 && battleField[v][h]=="B")
		 {
			 battleField[v][h]=" ";
			 return true;
		 }
		 return false;
	 }
	 

	

	// Magic bellow. Do not worry about this now, you will understand everything in this course.
	// Please concentrate on your tasks only.
	
	
	public static void main(String[] args) throws Exception {
		BattleFieldTemplate2 bf = new BattleFieldTemplate2();
		bf.runTheGame();
	}

	public BattleFieldTemplate2() throws Exception {
		JFrame frame = new JFrame("BATTLE FIELD, DAY 2");
		frame.setLocation(750, 150);
		frame.setMinimumSize(new Dimension(BF_WIDTH+15, BF_HEIGHT + 35));
		frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
		frame.getContentPane().add(this);
		frame.pack();
		frame.setVisible(true);
	}

	@Override
	protected void paintComponent(Graphics g) {
		super.paintComponent(g);
		
		int i = 0;
		Color cc;
		for (int v = 0; v < 9; v++) {
			for (int h = 0; h < 9; h++) {
				if (COLORDED_MODE) {
					if (i % 2 == 0) {
						cc = new Color(252, 241, 177);
					} else {
						cc = new Color(233, 243, 255);
					}
				} else {
					cc = new Color(180, 180, 180);
				}
				i++;
				g.setColor(cc);
				g.fillRect(h * 64, v * 64, 64, 64);
			}
		}
		
		for (int j = 0; j < battleField.length; j++) {
			for (int k = 0; k < battleField.length; k++) {
				if (battleField[j][k].equals("B")) {
					String coordinates = getQuadrantXY(j + 1, k + 1);
					int separator = coordinates.indexOf("_");
					int y = Integer.parseInt(coordinates.substring(0, separator));
					int x = Integer.parseInt(coordinates.substring(separator + 1));
					g.setColor(new Color(0, 0, 255));
					g.fillRect(x, y, 64, 64);
				}
			}
		}
		
		g.setColor(new Color(255, 0, 0));
		g.fillRect(tankX, tankY, 64, 64);
		
		g.setColor(new Color(0, 255, 0));
		if (tankDirection == 1) {
			g.fillRect(tankX + 20, tankY, 24, 34);
		} else if (tankDirection == 2) {
			g.fillRect(tankX + 20, tankY + 30, 24, 34);
		} else if (tankDirection == 3) {
			g.fillRect(tankX, tankY + 20, 34, 24);
		} else {
			g.fillRect(tankX + 30, tankY + 20, 34, 24);
		}
		
		g.setColor(new Color(255, 255, 0));
		g.fillRect(bulletX, bulletY, 14, 14);
	}

}