GUI Canvas (hitme game)

/*

* Hit the ship

*/

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

import java.awt.image.*;

import java.io.*;

import javax.imageio.*;

class HitMe extends Canvas

{

public static final int FRAME_WIDTH = 800;

public static final int FRAME_HEIGHT = 600;

public static final int FRAME_X_ORIGIN = 50;

public static final int FRAME_Y_ORIGIN = 50;

public static final int BUTTON_WIDTH = 250;

public static final int BUTTON_HEIGHT = 25;

public BufferedImage bi1, bi2, bi3;

public BufferStrategy bs;

public int iPosX, iPosY;

public int mPosX, mPosY;

public int firePosX, firePosY;

public int hitShipCtr;

public int rnd;

public static int scoreCtr;

public boolean up, down, left, right, space, launch, endGame, hit;

public HitMe( )

{

setSize(FRAME_WIDTH, FRAME_HEIGHT);

setLocation(0,0);

addKeyListener(new KeyStroke());

}

public static void main(String[] args)

{

JFrame j = new JFrame();

Container contentPane = j.getContentPane();

j.setTitle ("Move Me");

j.setSize (FRAME_WIDTH, FRAME_HEIGHT);

j.setLocation (FRAME_X_ORIGIN, FRAME_Y_ORIGIN);

j.setResizable(false);

j.setVisible(true);

j.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

HitMe c = new HitMe();

contentPane.add(c);

c.init();

c.requestFocus();

c.gameLoop();

}

public void init()

{

iPosX=390;

iPosY=530;

mPosX=-10;

mPosY=20;

firePosX=0;

firePosY=0;

hitShipCtr=0;

hit=false;

scoreCtr=0;

rnd=10;

createBufferStrategy(2);

bs = getBufferStrategy();

try

{

bi1 = ImageIO.read(new File("shiphit.png"));

bi2 = ImageIO.read(new File("ship.gif"));

bi3 = ImageIO.read(new File("canon.png"));

}

catch(IOException e)

{

JOptionPane.showMessageDialog(null, "error");

}

}

public void gameLoop()

{

while(!endGame)

{

gameLogic();

//put this at the top for clearing screen

Graphics g = bs.getDrawGraphics();

g.setColor(Color.WHITE);

g.fillRect(0,0,FRAME_WIDTH,FRAME_HEIGHT);

// Draw your objects on the screen

// g.drawImage(bi1,10,10,bi1.getWidth(),bi1.getHeight(),null);

// Color myColor = new Color(100, 125, 250);

g.setColor(Color.YELLOW);

g.fillRect(0,0,FRAME_WIDTH,70);

g.drawImage(bi3,iPosX,iPosY,bi3.getWidth(),bi3.getHeight(),null);

//target hit

if(firePosX>=mPosX-2 && firePosX<=mPosX+98 && firePosY==mPosY+50)

{

g.drawImage(bi1,mPosX,mPosY,bi1.getWidth(),bi1.getHeight(),null);

hitShipCtr++;

launch = false;

mPosX = mPosX - 1; //offset ctr to make ship stop

scoreCtr++;

if(hitShipCtr==10)

{

mPosX = 999;

hit = false;

firePosX=0;

firePosY=0;

hitShipCtr=0;

}

}

else

{

g.drawImage(bi2,mPosX,mPosY,bi2.getWidth(),bi2.getHeight(),null);

}

g.setColor(Color.BLACK);

g.fillRect(mPosX,mPosY+50,98,2);

if(launch)

{

g.setColor(Color.BLACK);

g.fillRect(firePosX,firePosY,10,10);

firePosY = firePosY - 1;

if(firePosY < 65)

{

launch=false;

}

}

if(mPosX > 810)

{

mPosX = -10;

rnd = (int) Math.floor(Math.random() * 10) + 5;

}

else

{

mPosX++;

}

try

{

Thread.sleep(rnd);

}

catch(Exception e)

{

}

finally

{

// put this at the bottom for showing

bs.show();

}

}

JOptionPane.showMessageDialog(null, "The Game has ended. Thank you for playing.");

System.exit(0);

}

public void gameLogic()

{

if(left)

{

if(iPosX>0)

{

iPosX--;

}

}

if(right)

{

if(iPosX<750)

{

iPosX++;

}

}

if(space)

{

launch = true;

firePosX = iPosX+20;

firePosY = 525;

space = false;

}

// if(up)

// {

// iPosY = iPosY - 1;

// }

// if(down)

// {

// iPosY = iPosY + 1;

// }

}

class KeyStroke implements KeyListener

{

public void keyPressed(KeyEvent e)

{

if (e.getKeyCode()==KeyEvent.VK_ESCAPE)

{

endGame = true;

}

if (e.getKeyCode()==KeyEvent.VK_UP)

{

up = true;

}

if (e.getKeyCode()==KeyEvent.VK_DOWN)

{

down = true;

}

if (e.getKeyCode()==KeyEvent.VK_LEFT)

{

left = true;

}

if (e.getKeyCode()==KeyEvent.VK_RIGHT)

{

right = true;

}

if (e.getKeyCode()==KeyEvent.VK_SPACE)

{

space = true;

}

}

public void keyReleased(KeyEvent e)

{

if (e.getKeyCode()==KeyEvent.VK_UP)

{

up = false;

}

if (e.getKeyCode()==KeyEvent.VK_DOWN)

{

down = false;

}

if (e.getKeyCode()==KeyEvent.VK_LEFT)

{

left = false;

}

if (e.getKeyCode()==KeyEvent.VK_RIGHT)

{

right = false;

}

}

public void keyTyped(KeyEvent e)

{

}

}

}