Create space.java

fixes Niraj-1729#59

space.java

@@ -0,0 +1,185 @@
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.KeyEvent;
+import java.awt.event.KeyListener;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+public class SpaceInvadersGame extends JPanel implements KeyListener, ActionListener {
+    private int playerX, playerY;
+    private List<Alien> aliens;
+    private List<Bullet> bullets;
+    private boolean isGameOver;
+    private int score;
+
+    private SpaceInvadersGame() {
+        playerX = 300;
+        playerY = 480;
+        isGameOver = false;
+        score = 0;
+
+        aliens = new ArrayList<>();
+        bullets = new ArrayList();
+
+        // Initialize aliens
+        for (int i = 0; i < 6; i++) {
+            aliens.add(new Alien(i * 100, 0));
+        }
+
+        Timer timer = new Timer(15, this);
+        timer.start();
+
+        addKeyListener(this);
+        setFocusable(true);
+        setFocusTraversalKeysEnabled(false);
+    }
+
+    public void paintComponent(Graphics g) {
+        super.paintComponent(g);
+        // Draw background
+        g.setColor(Color.black);
+        g.fillRect(0, 0, 800, 600);
+
+        // Draw player
+        g.setColor(Color.blue);
+        g.fillRect(playerX, playerY, 50, 50);
+
+        // Draw aliens
+        for (Alien alien : aliens) {
+            g.setColor(Color.green);
+            g.fillRect(alien.x, alien.y, 50, 50);
+        }
+
+        // Draw bullets
+        for (Bullet bullet : bullets) {
+            g.setColor(Color.red);
+            g.fillRect(bullet.x, bullet.y, 10, 20);
+        }
+
+        // Display score
+        g.setColor(Color.white);
+        g.setFont(new Font("Arial", Font.PLAIN, 20));
+        g.drawString("Score: " + score, 10, 30);
+
+        if (isGameOver) {
+            g.setFont(new Font("Arial", Font.PLAIN, 50));
+            g.drawString("Game Over", 300, 300);
+        }
+    }
+
+    public void actionPerformed(ActionEvent e) {
+        if (!isGameOver) {
+            // Move aliens
+            for (Alien alien : aliens) {
+                alien.y += 2;
+            }
+
+            // Move bullets
+            for (Bullet bullet : bullets) {
+                bullet.y -= 5;
+            }
+
+            // Check for collisions
+            checkCollisions();
+
+            // Remove off-screen aliens and bullets
+            aliens.removeIf(alien -> alien.y > 600);
+            bullets.removeIf(bullet -> bullet.y < 0);
+
+            // Spawn new aliens
+            if (aliens.isEmpty()) {
+                for (int i = 0; i < 6; i++) {
+                    aliens.add(new Alien(i * 100, 0));
+                }
+            }
+
+            repaint();
+        }
+    }
+
+    private void checkCollisions() {
+        for (Alien alien : new ArrayList<>(aliens)) {
+            for (Bullet bullet : new ArrayList<>(bullets)) {
+                if (alien.getBounds().intersects(bullet.getBounds())) {
+                    aliens.remove(alien);
+                    bullets.remove(bullet);
+                    score += 10;
+                }
+            }
+
+            if (alien.getBounds().intersects(new Rectangle(playerX, playerY, 50, 50))) {
+                isGameOver = true;
+            }
+        }
+    }
+
+    public void keyTyped(KeyEvent e) {}
+
+    public void keyPressed(KeyEvent e) {
+        int key = e.getKeyCode();
+
+        if (key == KeyEvent.VK_LEFT && playerX > 0) {
+            playerX -= 20;
+        }
+
+        if (key == KeyEvent.VK_RIGHT && playerX < 750) {
+            playerX += 20;
+        }
+
+        if (key == KeyEvent.VK_SPACE) {
+            if (!isGameOver) {
+                bullets.add(new Bullet(playerX + 20, playerY));
+            } else {
+                // Restart the game
+                isGameOver = false;
+                playerX = 300;
+                score = 0;
+                aliens.clear();
+                bullets.clear();
+                for (int i = 0; i < 6; i++) {
+                    aliens.add(new Alien(i * 100, 0));
+                }
+            }
+        }
+    }
+
+    public void keyReleased(KeyEvent e) {}
+
+    public static void main(String[] args) {
+        JFrame frame = new JFrame("Space Invaders");
+        SpaceInvadersGame game = new SpaceInvadersGame();
+        frame.add(game);
+        frame.setSize(800, 600);
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        frame.setVisible(true);
+    }
+
+    private class Alien {
+        int x, y;
+
+        Alien(int x, int y) {
+            this.x = x;
+            this.y = y;
+        }
+
+        Rectangle getBounds() {
+            return new Rectangle(x, y, 50, 50);
+        }
+    }
+
+    private class Bullet {
+        int x, y;
+
+        Bullet(int x, int y) {
+            this.x = x;
+            this.y = y;
+        }
+
+        Rectangle getBounds() {
+            return new Rectangle(x, y, 10, 20);
+        }
+    }
+}