Java-AWT：使对象指向其他对象

Question

I am a begginer java programmer for AWT, and I'm wondering how I make Enemy() point to Player() . Here is my code so far:

Player.java:

import java.awt.Color;
import java.awt.Graphics;
public class Player extends GameObject {
    public Player(int x, int y, Color color) {
       super(x, y, color);
    }

    @Override
    public void tick() {
        x += velX;
        y += velY;
    }

    @Override
    public void render(Graphics g) {
        g.setColor(color);
        g.fillRect(x, y, 32, 32);
    }   
}

Enemy.java:

import java.awt.Color;
import java.awt.Graphics;

public class Enemy extends GameObject {
    public Enemy(int x, int y, Color color) {
        super(x, y, color);
    }

    @Override
    public void tick() {
        x += velX;
        y += velY;
    }

    @Override
    public void render(Graphics g) {
        g.setColor(color);
        g.fillRect(x, y, 32, 32);
    }   
}

So how can I begin moving Enemy() towards Player() so the game actually works?

Answer 1

You need a reference to a GameObject somehow. You're missing that in your design. Somewhere, in these two classes, or another class, you should be keeping track of a reference to a GameObject variable that you can then just set to be the enemy player. There's no way to arbitrarily make one class into another.