如何访问正在运行的线程的属性值 [英] How can I access the property value of a running Thread

问题描述

我有一个线程运行了很长时间(5-6 分钟).

I have a Thread that run for a long time (5-6 min).

public class ExportThread implements Runnable {
    private Integer totalExport = 0;

    @Override
    public void run() {
        try {
            exportCorner();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void exportCorner() {
        List<MyObject> list = ......
        for(MyObject o : list){
            .......
            totalExport++;
        }
    }
}

这个线程从另一个类运行.如何在很小的间隔后一次又一次地获得 totalExport ?

This Thread runs from another class. How can I get the totalExport again and again after a small interval ?

推荐答案

只需向线程类添加一些 getter 即可获得它，正如@RomanKonoval 所说，它需要同步

Simply you get it by adding some getters to your thread class, as @RomanKonoval said it need to be synchronized

public class ExportThread implements Runnable {
    private Integer totalExport = 0;

    @Override
    public void run() {
        try {
            exportCorner();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void exportCorner() {
        List<Integer> list = ......
        for(Integer i : list){
            totalExport += i;
        }
    }

    public synchronized Integer getTotalExport(){
        return this.totalExport;
    }
}

从你的其他班级你可以使用类似的东西

From your other class you can use something like that

import java.util.*;

public class MainClass {
   public static void main(String[] args) {
       ExportThread exportThread = new ExportThread();
       Thread t = new Thread(exportThread); 
       t.start(); 

      TimerTask timerTask= new MyTimerTask(exportThread);
      Timer timer = new Timer();

      timer.scheduleAtFixedRate(tasknew,new Date(),1000);      
   }

}

那么你可能需要实现你的定时器任务

Then you may need to implement your timer task

public class MyTimerTask extends TimerTask { 
    private ExportThread exportThread;
    public MyTimerTask(ExportThread exportThread){
        this.exportThread = exportThread;
    }
    @Override
    public void run() {
        System.out.println(exportThread.getTotalExports());
    }
}

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