Question

请考虑以下代码：来源：http://docs.oracle.com/javafx/2/threads/jfxpub-threads.htm

import javafx.concurrent.Task;

Task<Integer> task = new Task<Integer>() {
    @Override protected Integer call() throws Exception {
        int iterations;
        for (iterations = 0; iterations < 1000; iterations++) {
            if (isCancelled()) {
                updateMessage("Cancelled");
                break;
            }
            updateMessage("Iteration " + iterations);
            updateProgress(iterations, 1000);


        //Block the thread for a short time, but be sure
        //to check the InterruptedException for cancellation
        try {
            Thread.sleep(100);
        } catch (InterruptedException interrupted) {
            if (isCancelled()) {
                updateMessage("Cancelled");
                break;
            }
        }
    }
    return iterations;
    }
};

我正在学习JavaFX并想知道，如果我必须创建10个独立的线程。比方说，Thread 1将从位于IP 11.11.1.111的MySQL获取数据，Thread 2将从位于IP 22.22.2.222的MySQL获取数据，所以我需要为10个线程中的每个线程编写从@Override protected Integer call() throws Exception {开始的代码，这将是10次？

这就是我现在所拥有的：

public class MyClass extends Task<Integer> 
 {
         private Class2 QRVC ;

        // my variable declarations here

         @Override protected Integer call() throws Exception {




         // Defining logic to grab data from 11.11.1.111
         // Updating the progress bar



         }


         @Override protected Integer call() throws Exception {




         // Defining logic to grab data from 22.22.2.222
         // Updating the progress bar



         }

         @Override protected Integer call() throws Exception {




         // Defining logic to grab data from 33.33.3.333
         // Updating the progress bar



         }


      }// END OF Class MyClass

Answer 1

我希望你有10个不同的进度条。

只需制作10个不同的类，这些类扩展Task并将您的逻辑放入单独的call()

public class MyClass1 extends Task<Integer> 
{
    // my variable declarations here

     @Override protected Integer call() throws Exception {

     // Defining logic to grab data from 11.11.1.111
     // Updating the progress bar
     }
}

public class MyClass2 extends Task<Integer> 
{
    // my variable declarations here

     @Override protected Integer call() throws Exception {

     // Defining logic to grab data from 22.22.2.222
     // Updating the progress bar
     }
}

依旧......

然后你可以拥有你的

分配给MyClass1
分配给MyClass2的Thread2等等..

将任务分配给线程

MyClass1 objClass1 = new MyClass1();
Thread thread1 = new Thread(objClass1);
thread1.start();

JavaFX中的独立线程

1 个答案: