Netbeans 8.2, Java Game SpceInvaders (Shoot from left to right)

 

Alien.java

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package ruangangkasa1;

 

/**

 *

 * @author Acer

 */

public class Alien extends Sprite {

        private final int INITIAL_X = 400;

 

    public Alien(int x, int y) {

        super(x, y);

 

        initAlien();

    }

 

    private void initAlien() {

 

        loadImage("C:/Users/Acer/Pictures/Documents/NetBeansProjects/RuangAngkasa1/src/ruangangkasa1/alien.png");

        getImageDimensions();

    getImageDimensions();

    }

 

    public void move() {

 

        if (x < 0) {

            x = INITIAL_X;

        }

 

        x -= 1;

    }

 

   

}

 

Board.java

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package ruangangkasa1;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.FontMetrics;

import java.awt.Graphics;

import java.awt.Rectangle;

import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.KeyAdapter;

import java.awt.event.KeyEvent;

import java.util.ArrayList;

import java.util.List;

import javax.swing.JPanel;

import javax.swing.Timer;

/**

 *

 * @author Acer

 */

public class Board extends JPanel implements ActionListener {

private Timer timer;

    private SpaceShip spaceship;

    private List<Alien> aliens;

    private boolean ingame;

    private final int ICRAFT_X = 40;

    private final int ICRAFT_Y = 60;

    private final int B_WIDTH = 400;

    private final int B_HEIGHT = 300;

    private final int DELAY = 15;

 

    private final int[][] pos = {

        {2380, 29}, {2500, 59}, {1380, 89},

        {780, 109}, {580, 139}, {680, 239},

        {790, 259}, {760, 50}, {790, 150},

        {980, 209}, {560, 45}, {510, 70},

        {930, 159}, {590, 80}, {530, 60},

        {940, 59}, {990, 30}, {920, 200},

        {900, 259}, {660, 50}, {540, 90},

        {810, 220}, {860, 20}, {740, 180},

        {820, 128}, {490, 170}, {700, 30}

    };

 

    public Board() {

 

        initBoard();

    }

 

    private void initBoard() {

 

        addKeyListener(new TAdapter());

        setFocusable(true);

        setBackground(Color.BLACK);

        ingame = true;

 

        setPreferredSize(new Dimension(B_WIDTH, B_HEIGHT));

 

        spaceship = new SpaceShip(ICRAFT_X, ICRAFT_Y);

 

        initAliens();

 

        timer = new Timer(DELAY, this);

        timer.start();

    }

 

    public void initAliens() {

       

        aliens = new ArrayList<>();

 

        for (int[] p : pos) {

            aliens.add(new Alien(p[0], p[1]));

        }

    }

 

    @Override

    public void paintComponent(Graphics g) {

        super.paintComponent(g);

 

        if (ingame) {

 

            drawObjects(g);

 

        } else {

 

            drawGameOver(g);

        }

 

        Toolkit.getDefaultToolkit().sync();

    }

 

    private void drawObjects(Graphics g) {

 

        if (spaceship.isVisible()) {

            g.drawImage(spaceship.getImage(), spaceship.getX(), spaceship.getY(),

                    this);

        }

 

        List<Missile> ms = spaceship.getMissiles();

 

        for (Missile missile : ms) {

            if (missile.isVisible()) {

                g.drawImage(missile.getImage(), missile.getX(),

                        missile.getY(), this);

            }

        }

 

        for (Alien alien : aliens) {

            if (alien.isVisible()) {

                g.drawImage(alien.getImage(), alien.getX(), alien.getY(), this);

            }

        }

 

        g.setColor(Color.WHITE);

        g.drawString("Aliens left: " + aliens.size(), 5, 15);

    }

 

    private void drawGameOver(Graphics g) {

 

        String msg = "Selesai!";

        Font small = new Font("Helvetica", Font.BOLD, 14);

        FontMetrics fm = getFontMetrics(small);

 

        g.setColor(Color.white);

        g.setFont(small);

        g.drawString(msg, (B_WIDTH - fm.stringWidth(msg)) / 2,

                B_HEIGHT / 2);

    }

 

    @Override

    public void actionPerformed(ActionEvent e) {

 

        inGame();

 

        updateShip();

        updateMissiles();

        updateAliens();

 

        checkCollisions();

 

        repaint();

    }

 

    private void inGame() {

 

        if (!ingame) {

            timer.stop();

        }

    }

 

    private void updateShip() {

 

        if (spaceship.isVisible()) {

           

            spaceship.move();

        }

    }

 

    private void updateMissiles() {

 

        List<Missile> ms = spaceship.getMissiles();

 

        for (int i = 0; i < ms.size(); i++) {

 

            Missile m = ms.get(i);

 

            if (m.isVisible()) {

                m.move();

            } else {

                ms.remove(i);

            }

        }

    }

 

    private void updateAliens() {

 

        if (aliens.isEmpty()) {

 

            ingame = false;

            return;

        }

 

        for (int i = 0; i < aliens.size(); i++) {

 

            Alien a = aliens.get(i);

           

            if (a.isVisible()) {

                a.move();

            } else {

                aliens.remove(i);

            }

        }

    }

 

    public void checkCollisions() {

 

        Rectangle r3 = spaceship.getBounds();

 

        for (Alien alien : aliens) {

           

            Rectangle r2 = alien.getBounds();

 

            if (r3.intersects(r2)) {

               

                spaceship.setVisible(false);

                alien.setVisible(false);

                ingame = false;

            }

        }

 

        List<Missile> ms = spaceship.getMissiles();

 

        for (Missile m : ms) {

 

            Rectangle r1 = m.getBounds();

 

            for (Alien alien : aliens) {

 

                Rectangle r2 = alien.getBounds();

 

                if (r1.intersects(r2)) {

                   

                    m.setVisible(false);

                    alien.setVisible(false);

                }

            }

        }

    }

 

    private class TAdapter extends KeyAdapter {

 

        @Override

        public void keyReleased(KeyEvent e) {

            spaceship.keyReleased(e);

        }

 

        @Override

        public void keyPressed(KeyEvent e) {

            spaceship.keyPressed(e);

        }

    }

 

 

}

 

Missile.java

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package ruangangkasa1;

 

/**

 *

 * @author Acer

 */

public class Missile extends Sprite {

    private final int BOARD_WIDTH = 390;

    private final int MISSILE_SPEED = 2;

 

    public Missile(int x, int y) {

        super(x, y);

 

        initMissile();

    }

   

    private void initMissile() {

       

        loadImage("C:/Users/Acer/Pictures/Documents/NetBeansProjects/RuangAngkasa1/src/ruangangkasa1/missile.png");

        getImageDimensions();       

    }

 

    public void move() {

       

        x += MISSILE_SPEED;

       

        if (x > BOARD_WIDTH)

            visible = false;

    }

 

   

}

 

RuangAngkasa1.java

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package ruangangkasa1;

import java.awt.EventQueue;

import javax.swing.JFrame;

/**

 *

 * @author Acer

 */

public class RuangAngkasa1 extends JFrame {

public RuangAngkasa1() {

       

        initUI();

    }

    /**

     * @param args the command line arguments

     */

    private void initUI() {

       

        add(new Board());

       

        setResizable(false);

        pack();

       

        setTitle("Collision");

        setLocationRelativeTo(null);

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    }

 

    public static void main(String[] args) {

       

        EventQueue.invokeLater(() -> {

            RuangAngkasa1 ex = new RuangAngkasa1();

            ex.setVisible(true);

        });

    }

   

}

 

SpaceShip.java

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package ruangangkasa1;

import java.awt.event.KeyEvent;

import java.util.ArrayList;

import java.util.List;

/**

 *

 * @author Acer

 */

public class SpaceShip extends Sprite {

    private int dx;

    private int dy;

    private List<Missile> missiles;

 

    public SpaceShip(int x, int y) {

        super(x, y);

 

        initCraft();

    }

 

    private void initCraft() {

       

        missiles = new ArrayList<>();

        loadImage("C:/Users/Acer/Pictures/Documents/NetBeansProjects/RuangAngkasa1/src/ruangangkasa1/spaceship.png");

        getImageDimensions();

    }

 

    public void move() {

 

        x += dx;

        y += dy;

 

        if (x < 1) {

            x = 1;

        }

 

        if (y < 1) {

            y = 1;

        }

    }

 

    public List<Missile> getMissiles() {

        return missiles;

    }

 

    public void keyPressed(KeyEvent e) {

 

        int key = e.getKeyCode();

 

        if (key == KeyEvent.VK_SPACE) {

            fire();

        }

 

        if (key == KeyEvent.VK_LEFT) {

            dx = -1;

        }

 

        if (key == KeyEvent.VK_RIGHT) {

            dx = 1;

        }

 

        if (key == KeyEvent.VK_UP) {

            dy = -1;

        }

 

        if (key == KeyEvent.VK_DOWN) {

            dy = 1;

        }

    }

 

    public void fire() {

        missiles.add(new Missile(x + width, y + height / 2));

    }

 

    public void keyReleased(KeyEvent e) {

 

        int key = e.getKeyCode();

 

        if (key == KeyEvent.VK_LEFT) {

            dx = 0;

        }

 

        if (key == KeyEvent.VK_RIGHT) {

            dx = 0;

        }

 

        if (key == KeyEvent.VK_UP) {

            dy = 0;

        }

 

        if (key == KeyEvent.VK_DOWN) {

            dy = 0;

        }

    }

 

      

}

 

Sprite.java

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package ruangangkasa1;

import java.awt.Image;

import java.awt.Rectangle;

import javax.swing.ImageIcon;

/**

 *

 * @author Acer

 */

public class Sprite {

    protected int x;

    protected int y;

    protected int width;

    protected int height;

    protected boolean visible;

    protected Image image;

 

    public Sprite(int x, int y) {

 

        this.x = x;

        this.y = y;

        visible = true;

    }

 

    protected void getImageDimensions() {

 

        width = image.getWidth(null);

        height = image.getHeight(null);

    }

 

    protected void loadImage(String imageName) {

 

        ImageIcon ii = new ImageIcon(imageName);

        image = ii.getImage();

    }

 

    public Image getImage() {

        return image;

    }

 

    public int getX() {

        return x;

    }

 

    public int getY() {

        return y;

    }

 

    public boolean isVisible() {

        return visible;

    }

 

    public void setVisible(Boolean visible) {

        this.visible = visible;

    }

 

    public Rectangle getBounds() {

        return new Rectangle(x, y, width, height);

    }

 

}