import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.lang.reflect.InvocationTargetException;
import javax.swing.*;

public class TestApplet extends JApplet
{
    @Override
    public void init()
    {
        try
        {
            SwingUtilities.invokeAndWait(new Runnable()
            {
                @Override
                public void run()
                {
                    createGUI();
                }
            });
        }
        catch(InterruptedException | InvocationTargetException ex)
        {
        }
    }

    private void createGUI()
    {
        getContentPane().setLayout(new FlowLayout());
        JButton startButton = new JButton("Do work");
        startButton.addActionListener(new ActionListener()
        {
            @Override
            public void actionPerformed(ActionEvent ae)
            {
                JLabel label = new JLabel();
                new Worker(label).execute();
            }
        });
        getContentPane().add(startButton);
    }

    private class Worker extends SwingWorker<Void,Void>
    {
        JLabel label;

        public Worker(JLabel label)
        {
            this.label = label;
        }

        @Override
        protected Void doInBackground() throws Exception
        {
            // do work
            return null;
        }

        @Override
        protected void done()
        {
            getContentPane().remove(label);
            getContentPane().revalidate();
        }
    }
}

这是向applet添加一个标签,显示Worker线程的一些中间结果(使用publish / process方法).最后,标签从小应用程序的窗格中删除.我的问题是,我如何创建几个标签,每个标签都有自己的工作线程,并在完成后删除它们？

提前致谢.

更新：

我希望这将澄清我的问题.当所有的工作人员都完成了任务,而不是在每个工作人员完成后立即将标签全部删除.

更新2：

以下代码似乎正在做我需要的.请评论我是否做了正确的方法.我有一种感觉有什么问题.一个问题是,除去删除按钮之后,按钮右侧的标签仍然可见. setVisible(false)似乎解决了这个问题.是这样做吗？

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.lang.reflect.InvocationTargetException;
import java.util.LinkedList;
import java.util.List;
import java.util.Queue;
import java.util.Random;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import javax.swing.*;

public class TestApplet extends JApplet
{
    private Queue<JLabel> labels = new LinkedList<>();
    private static final Random rand = new Random();

    @Override
    public void init()
    {
        try
        {
            SwingUtilities.invokeAndWait(new Runnable()
            {
                @Override
                public void run()
                {
                    createGUI();
                }
            });
        }
        catch(InterruptedException | InvocationTargetException ex){}
    }

    private void createGUI()
    {
        getContentPane().setLayout(new FlowLayout());
        JButton startButton = new JButton("Do work");
        startButton.addActionListener(new ActionListener()
        {
            @Override
            public void actionPerformed(ActionEvent ae)
            {
                ExecutorService executor = Executors.newFixedThreadPool(10);
                for(int i = 0; i < 10; i++)
                {
                    JLabel label = new JLabel();
                    getContentPane().add(label);
                    executor.execute(new Counter(label));
                }
            }
        });
        getContentPane().add(startButton);
    }

    private class Counter extends SwingWorker<Void,Integer>
    {
        private JLabel label;

        public Counter(JLabel label)
        {
            this.label = label;
        }

        @Override
        protected Void doInBackground() throws Exception
        {
            for(int i = 1; i <= 100; i++)
            {
                publish(i);
                Thread.sleep(rand.nextInt(80));
            }

            return null;
        }

        @Override
        protected void process(List<Integer> values)
        {
            label.setText(values.get(values.size() - 1).toString());
        }

        @Override
        protected void done()
        {
            labels.add(label);

            if(labels.size() == 10)
            {
                while(!labels.isEmpty())
                    getContentPane().remove(labels.poll());

                getContentPane().revalidate();
            }
        }
    }
}