Nuovi progetti

SparaBalle/src/FallingBalls.java

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+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.*;
+import java.util.Random;
+
+class GameObject{
+    private static final Random rnd = new Random();
+    protected int x, y;
+    protected int speed;
+    protected int diam = rnd.nextInt(10, 30);
+
+    GameObject(int maxW) {
+        reset(maxW);
+    }
+
+    void reset(int maxW) {
+        x = rnd.nextInt(Math.max(1, maxW - diam));
+        y = rnd.nextInt(50);
+        speed = 2 + rnd.nextInt(6);
+    }
+
+    void update(int panelH, int panelW) {
+        y += speed;
+        if (y > panelH) reset(panelW);
+    }
+
+    void draw(Graphics g) {
+        g.fillOval(x, y, diam, diam);
+    }
+}
+
+class Pallina extends GameObject{
+    public Pallina(int maxW) {
+        super(maxW);
+    }
+}
+
+class Astronave extends GameObject{
+
+    Astronave() {
+        super(0);
+    }
+
+    void update(int coordXMouse, int coordYMouse) {
+        x = coordXMouse;
+        y = coordYMouse;
+    }
+
+    void draw(Graphics g) {
+        g.fillRect(x, y, diam, 50);
+    }
+}
+
+class Proiettile extends GameObject{
+    public Proiettile(int x, int y) {
+        super(0);
+        super.x = x;
+        super.y = y;
+        speed = -10;
+    }
+}
+
+class ButtonHandler implements ActionListener{
+
+    private FallingBalls panel;
+    private JButton btn;
+
+    public ButtonHandler(FallingBalls panel, JButton btn) {
+        this.panel = panel;
+        this.btn = btn;
+    }
+
+
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        panel.paused = !panel.paused;
+        btn.setText(panel.paused ? "Play" : "Pause");
+    }
+
+}
+
+public class FallingBalls extends JPanel implements MouseMotionListener, MouseListener {
+
+    static final int N_BALLS = 6;
+    Pallina[] balls = new Pallina[N_BALLS];
+    Astronave astro = new Astronave();
+    Proiettile p;
+
+    boolean paused = false;
+
+    public FallingBalls() {
+        setBounds(0,0,500, 400);
+        setBackground(Color.WHITE);
+
+        for (int i = 0; i < N_BALLS; i++)
+            balls[i] = new Pallina(500);
+
+    }
+
+    @Override
+    protected void paintComponent(Graphics g) {
+        super.paintComponent(g);
+        g.setColor(Color.RED);
+        for (int i=0; i<balls.length; i++)
+            balls[i].draw(g);
+        astro.draw(g);
+        if(p!=null) p.draw(g);
+    }
+
+    void update() {
+        if(!paused)
+            for (Pallina b : balls) b.update(500,400);
+        if(p!=null) p.update(500,400);
+    }
+
+
+    public static void main(String[] args) {
+
+        JFrame f = new JFrame("Falling Balls");
+        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        f.setBounds(0, 0, 500, 600);
+        f.setLayout(null);
+
+        FallingBalls panel = new FallingBalls();
+        panel.setBounds(0, 0, 500, 400);
+        f.add(panel);
+        panel.addMouseMotionListener(panel);
+        panel.addMouseListener(panel);
+
+        JButton btn = new JButton("Pause");
+        btn.setBounds(0, 400, 500, 80);
+
+
+        ButtonHandler bh = new ButtonHandler(panel, btn);
+        btn.addActionListener(bh);
+        /*
+        btn.addActionListener(ev -> {
+            panel.paused = !panel.paused;
+            btn.setText(panel.paused ? "Play" : "Pause");
+        });
+        */
+
+        f.add(btn);
+
+
+        f.setVisible(true);
+
+        while(true) {
+            panel.update();
+            panel.repaint();
+            try {
+                Thread.sleep(16);
+            } catch (InterruptedException e) {
+                // TODO Auto-generated catch block
+                e.printStackTrace();
+            }
+        }
+    }
+
+    @Override
+    public void mouseDragged(MouseEvent e) {
+        // TODO Auto-generated method stub
+
+    }
+
+    @Override
+    public void mouseMoved(MouseEvent e) {
+        astro.x = e.getX();
+        astro.y = e.getY();
+
+    }
+
+    @Override
+    public void mouseClicked(MouseEvent e) {
+        // TODO Auto-generated method stub
+
+    }
+
+    @Override
+    public void mousePressed(MouseEvent e) {
+        p = new Proiettile(e.getX(), e.getY());
+    }
+
+    @Override
+    public void mouseReleased(MouseEvent e) {
+        // TODO Auto-generated method stub
+
+    }
+
+    @Override
+    public void mouseEntered(MouseEvent e) {
+        // TODO Auto-generated method stub
+
+    }
+
+    @Override
+    public void mouseExited(MouseEvent e) {
+        // TODO Auto-generated method stub
+
+    }
+}