如何在 Java 中建立具有單獨計時器的隨機移動物件？

<code class="java">import java.awt.event.ActionListener;
import java.util.List;
import java.util.Random;

class Shape {

    // Object properties
    int x;
    int y;
    boolean draw;
    int randomDelay; // Delay before the object starts moving

    public Shape(int x, int randomDelay) {
        this.x = x;
        this.y = 0; // Start at the bottom of the screen
        this.draw = false;
        this.randomDelay = randomDelay;
    }

    // Object movement logic
    public void move() {
        if (draw) {
            y++; // Move up or down based on the current state
        }
    }

    // Decrease the delay
    public void decreaseDelay() {
        randomDelay--;
        if (randomDelay <= 0) {
            draw = true; // Start drawing the object once the delay reaches zero
        }
    }

    // Draw the object
    public void draw(Graphics g) {
        if (draw) {
            // Draw the shape on the screen
        }
    }
}

<code class="java">// Create a list of Shape objects with random delays
List<Shape> shapes = new ArrayList<>();
for (int i = 0; i < 10; i++) {
    Random random = new Random();
    int randomXLoc = random.nextInt(width);
    int randomDelay = random.nextInt(500); // Set a random delay between 0 and 499 milliseconds
    shapes.add(new Shape(randomXLoc, randomDelay));
}

// Initialize a timer and specify the action listener
Timer timer = new Timer(10, new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent e) {
        for (Shape shape : shapes) {
            shape.move();
            shape.decreaseDelay();
            shape.draw(g); // Draw the shape if allowed
        }
    }
});

// Start the timer
timer.start();</code>