如何将actionlistener应用到我的计时器？

Question

I am trying to link an actionlistener to a timer for a game I am writing. Whenever the timer fires, monsters in a 2D array randomly move to one adjacent tile. The array is not completely full of monsters. Where there aren't monsters, my array has null.

Here's what I have so far:

private class MonsterListener implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        for (int i = 0; i < Level.SIZE; i++) {
            for (int j = 0; j < Level.SIZE; j++) {
                if (monsters[i][j] != null) {
                    monsters[i][j].update();
                }
            }
        }
        updateState();
    }
}

And inside my Monster class:

public void update() {
        rand1 = new Random();
        rand2 = new Random();
        drow = rand1.nextInt(3); //random int 0,1,2
        dcol = rand2.nextInt(3); //random int 0,1,2
        drow -= 1; //random int -1,0,1
        dcol -= 1; //random int -1,0,1

        row += drow;
        col += dcol;
    }   

When I create my timer, I do this

public final int DELAY = 1000;
Timer myTimer = new Timer(DELAY, new MonsterListener());

However, I keep getting an error that reads

cannot find symbol
symbol  : constructor Timer(int,Game.MonsterListener)
location: class java.util.Timer
    myTimer = new Timer(DELAY, listener);
                      ^

Answer 1

I think you need to use javax.swing.Timer instead of java.util.Timer

[I suspect this because you are using ActionListener ]