java timer,如何实现timertask

时间:2018-06-23 22:14:34

标签: java timer

我想每隔一定时间更新对象属性(调用休息服务)。

我有对象定义和带有new和set的类

public class Obj {
    private String data;
    //Getters and setters
}

//A class with the new and sets:

Public class setData{
     public setData{
        Obj o = new Obj();
        o.setdata("hello");
     }
     TimerTask timerTask = new MyTimerTask();
     Timer timer = new Timer(true);
     timer.scheduleAtFixedRate(timerTask, 0, 10*1000);
}

public class MyTimerTask extends TimerTask {

    @Override
    public void run() {
/*
       Here is the question. How can I update the data property of        my object?
       I need to call the rest service, and update. The data              string is on a 
       swing UI.
       */
    }
}

这是问题。如何更新对象的数据属性? 我需要致电其余服务,并进行更新。数据字符串在摆动UI上。

谢谢!

1 个答案:

答案 0 :(得分:1)

为了从TimerTask内部更新组件,您的任务必须具有对那些组件的引用。一种实现方法是在任务中添加一个构造函数,以使用要操作的对象对其进行初始化。

例如:

public class MyComponent {
    private int data;
    // getters / setters
}

public class MyTimerTask extends TimerTask {
    private final MyComponent myComponent;
    public MyTimerTask(MyComponent myComponent) {
        super();
        this.myComponent = myComponent;
    }
    @Override
    public void run() {
        // here you can access your component's data value
        int val = this.myComponent.getData();
        // do whatever you need to
    }
}