如何将对外部类的引用传递给内部类中的方法？ （或者如何将“this”传递给内部类？）

Question

我有一个课程如下：

private class LanePair {

    public int cameraNumber;

    public Nest nest1, nest2;
    public LanePairStatus status = LanePairStatus.TIMER_OFF;
    Timer timer = new Timer();

    public LanePair(int cameraNunber, Nest nest1, Nest nest2) {
        this.cameraNumber = cameraNumber;
        this.nest1 = nest1;
        this.nest2 = nest2;
    }

    public void startTimer() {
        status = LanePairStatus.TIMER_ON;
        timer.schedule(new TimerTask() {
            public void run() {
                DoAskForLaneClear(/*I want to pass this class (LanePair) here*/);
            }
        }, 6000 ); // 6 seconds
    }

    public void stopTimer() {
        timer.cancel();
    }

}

问题是，我无法弄清楚如何做到这一点。有什么建议吗？

相关：

• How do you get a reference to the enclosing class from an anonymous inner class in Java?
• Getting hold of the outer class object from the inner class object

Answer 1

DoAskForLaneClear(LanePair.this);

由于您无法使用this（它将引用TimerTask），但您的匿名类不能存在于LanePair的实例中，该实例由{引用{1}}

Answer 2

我想你想要

DoAskForLaneClear(this);

或

this.DoAskForLaneClear();

我没有看到DoAskForLaneClear（）的定义在哪里。

Answer 3

我有时会这样做：

        public void startTimer() {
            status = LanePairStatus.TIMER_ON;
            **final LanePair lanePairRef = this;**
            timer.schedule(new TimerTask() {
                    public void run() {
                            DoAskForLaneClear(**lanePairRef**);
                    }
            }, 6000 ); // 6 seconds
    }

Answer 4

如果你想在任何情况下使用这个字，例如：）

import java.util.Timer;
import java.util.TimerTask;

public class Test
{      


    public void doAskForLaneClear(LanePair lanePair){
        //Action of lanePair
    }

    private class LanePair {      
        public int cameraNumber;        
        public Nest nest1, nest2;        
        public LanePairStatus status = LanePairStatus.TIMER_OFF;
        Timer timer = new Timer();    


            public LanePair(int cameraNumber, Nest nest1, Nest nest2) {
                this.cameraNumber = cameraNumber;            
                this.nest1 = nest1;         
                this.nest2 = nest2;
                startTimer();
            }      

            public void startTimer() {     
                status = LanePairStatus.TIMER_ON;           
                timer.schedule(new MyTimerTask(this), 6000 ); // 6 seconds       
            } 

            public void stopTimer() { 
                    timer.cancel();   
           }

    }

    private class MyTimerTask extends TimerTask{

        private LanePair lanePair;

        public MyTimerTask(LanePair lanePair){
            this.lanePair = lanePair;
        }

        @Override
        public void run() {
            Test.this.doAskForLaneClear(lanePair);
        }

    }

}

Answer 5

LanePair.class