Ihsan Invaders

APPLICATION
------------------------
import javax.swing.*;

public class Application {
    public static String path ="C:\\Users\\jarek\\OneDrive\\NUIG Private\\(2) Semester 2 2019\\Next Generation Technologies II CT255\\Assignment 3\\";
    private Application(){
        JFrame frame = new JFrame("Ihsan The Defender");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        GamePanel gamePanel= new GamePanel();
        frame.add(gamePanel);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setResizable(false);
        frame.setVisible(true);
        new Thread(gamePanel).start();
    }

    public static void main (String args[]){
        new Application();
    }
}

GAMEPANEL
------------------------
import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.security.Key;
import java.util.ArrayList;

public class GamePanel extends JPanel implements Runnable, KeyListener{
    private static final Dimension DESIRED_SIZE = new Dimension(600,700);
    private String path = Application.path;
    Image gameOverImg = new ImageIcon(path+"//images//gameover1.png").getImage();
    private Ihsan ihsan;
    private ArrayList <David> davids = new ArrayList<>();
    private int enemies=5;
    private boolean pause=false;
    private boolean gameOver=false;

    GamePanel(){
        ihsan = new Ihsan(this);
        for(int i=0; i<enemies; i++){
            davids.add(new David(this));
        }
        setFocusable(true);
        requestFocusInWindow();
        addKeyListener(this);
    }

    @Override
    public void run() {
        while (!pause || !gameOver){
            repaint();
            for(David david:davids){
                david.move();
            }
            synchronized ("bulletLock") {
                for (Bullet bullet : Bullet.bullets) {
                    bullet.move();
                }
            }

            try{Thread.sleep(30);}
            catch (InterruptedException e){}
        }
    }

    public void paint(Graphics g){
        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setColor(Color.GRAY);
        g2d.fillRect(0,0 ,getWidth(), getHeight());

        for(David david : davids){
            g2d.drawImage(david.getImg(), david.getX(), david.getY(), null);
        }
        g2d.drawImage(ihsan.getImg(), ihsan.getX(), ihsan.getY(), null);

        synchronized ("bulletLock") {
            for (Bullet bullet : Bullet.bullets) {
                g2d.drawImage(bullet.getImg(), bullet.getX(), bullet.getY(), null);
            }
        }

        if(gameOver){
            g2d.drawImage(gameOverImg,0,getHeight()/4,null);
        }
    }


    @Override
    public void keyPressed(KeyEvent e) {
        int key=e.getKeyCode();

        if (key==KeyEvent.VK_D || key==KeyEvent.VK_RIGHT){
            ihsan.move(4,0);
            System.out.println("Right Key");
        }

        if (key==KeyEvent.VK_A || key== KeyEvent.VK_LEFT){
            ihsan.move(-4,0);
            System.out.println("Left Key");
        }

        if(key==KeyEvent.VK_SPACE){
            Bullet.bullets.add(new Bullet(this,ihsan.getX()+(ihsan.getWidth()/2), ihsan.getY()));
        }
    }

    @Override
    public void keyTyped(KeyEvent e) { }

    @Override
    public void keyReleased(KeyEvent e) { }

    public boolean getGameOver(){
        return gameOver;
    }

    @Override
    public Dimension getPreferredSize(){
        return DESIRED_SIZE;
    }

    public void setGameOver(boolean gameOver) {
        this.gameOver = gameOver;
    }
}


BULLET
------------------------
import javax.swing.*;
import java.awt.*;
import java.util.ArrayList;

public class Bullet {
    //Environment
    public static ArrayList<Bullet> bullets = new ArrayList<>();
    private String path = Application.path;
    private GamePanel gp;
    //properties
    private int x,y;
    private int width,height;
    private int yVector;
    private Image image;


    Bullet(GamePanel gp, int x, int y){
        image = new ImageIcon(path+"\\images\\javaicon.png").getImage();
        width=image.getWidth(null);
        height=image.getHeight(null);
        this.gp=gp;
        this.x=x;
        this.y=y;
        yVector=5;
    }

    public void move(){
        synchronized ("bulletLock") {
            if (y < -height) {
                bullets.remove(this);
            }
        }
        y-=5;
    }

    public Image getImg(){
        return image;
    }

    public int getX(){
        return x;
    }

    public int getY(){
        return y;
    }
}


IHSAN
------------------------
import javax.swing.*;
import java.awt.*;
import java.util.ArrayList;

public class Ihsan {
    //environment
    String path = Application.path;
    private int jpWidth, jpHeight;
    GamePanel gp;
    //properties
    private Image image;
    private int x,y;
    private int width, height;

    Ihsan(GamePanel gp){
        this.gp=gp;
        //load the image
        image = new ImageIcon(path+"\\images\\ihsan.png").getImage();
        //get panel size
        //jpWidth=jp.getWidth returns 0 hence :
        jpWidth=gp.getPreferredSize().width;
        jpHeight=gp.getPreferredSize().height;
        //get ihsan size
        width=image.getWidth(null);
        height=image.getHeight(null);
        //set ihsan position
        x=jpWidth/2-width/2;
        y=jpHeight-height;
        Thread t = new Thread();
        t.start();
    }

    public void move(int xVector, int yVector){
        if(gp.getGameOver()){return;}
        if(x<=0-width/2 && xVector<0){return;}
        if(x>=jpWidth-width/2 && xVector>0){return;}
        x+=xVector;
        y+=yVector;
    }

    public Image getImg(){
        return image;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public int getHeight(){
        return height;
    }

    public int getWidth(){
        return width;
    }
}


DAVID
------------------------
import javax.swing.*;
import java.awt.*;
import java.util.Random;

public class David {
//    environment
    private GamePanel gamePanel;
    Random rand = new Random();
    String path = Application.path;
    private int jpWidth, jpHeight;
//    properties
    private Image image;
    private int x,y;
    private int yVector=1, xVector;
    private int width, height;

    David(GamePanel gamePanel){
        this.gamePanel=gamePanel;
//        load the image
        image = new ImageIcon(path+"\\images\\david.png").getImage();
//        get david size
        width=image.getWidth(null);
        height=image.getHeight(null);
//        get GamePanel's dimensions
        jpWidth=gamePanel.getPreferredSize().width;
        jpHeight=gamePanel.getPreferredSize().height;
//        random position
//        Math.random for better random-start-position:
        x= (int) (Math.random()*(jpWidth-width));
//        x=rand.nextInt(jpWidth-width);
        y=-rand.nextInt(height)-height;
    }

    private int i=0;
    public void move(){
        y+=yVector;
        if(i>20){
            xVector = rand.nextInt(3) - 1;
            i = 0;
        }else {i++;}
//        overwrite xVector if about to hit the border
        if(x<1){xVector=1;}
        if(x+width>jpWidth-1){xVector=-1;}

        x+=xVector;
        if(y+height>jpHeight){gamePanel.setGameOver(true);}
    }

    public Image getImg(){
        return image;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public int getWidth() {return width;}

    public int getHeight() {return height;}
}

//by Jaroslaw Janas