java 非同步執行任務，返回進度

import java.util.ArrayList;import java.util.List;import java.util.concurrent.Callable;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import java.util.concurrent.Future;/** *  * @author CaoZhongping * *非同步任務處理 */public class AsyncTaskExecutor<V>{private Callable<V> callable;    private int threadSize ; private static ExecutorService service;public AsyncTaskExecutor(Callable<V> callable, int threadSize) {super();this.callable = callable;this.threadSize = threadSize;}/*** * 開始任務 返回進度 * @return */public List<Future<V>> start(){service = Executors.newFixedThreadPool(threadSize);List<Future<V>> list = new ArrayList<Future<V>>(threadSize);for (int i = 0; i < threadSize; i++){list.add(service.submit(callable));}return list;}public  ExecutorService getService() {return service;}}//GUIimport java.awt.BorderLayout;import java.awt.Color;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.util.Random;import java.util.concurrent.Callable;import java.util.concurrent.ExecutionException;import java.util.concurrent.Future;import javax.swing.Box;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JProgressBar;import javax.swing.JScrollPane;import javax.swing.JTable;import javax.swing.JTextArea;import javax.swing.JTextField;import javax.swing.table.DefaultTableModel;public class Client extends JFrame{private static final long serialVersionUID = 1L;    private JTable table;    private JLabel label;    private JTextField field;    private JButton button;    private JTextArea status;    private JProgressBar bar;    private JLabel label2;    public Client(int width, int height) {    table = new JTable(new DefaultTableModel());    label = new JLabel("名稱");    field = new JTextField(15);    button = new JButton("尋找");    status = new JTextArea(10,5);    label2 = new JLabel("進度");    status.setForeground(Color.blue);    bar = new JProgressBar();    Box box = Box.createHorizontalBox();    box.add(Box.createHorizontalStrut(50));    box.add(label);    box.add(field);    box.add(button);    box.add(Box.createHorizontalStrut(50));    this.setLayout(new BorderLayout());    this.add(box,BorderLayout.NORTH);    this.add(table,BorderLayout.CENTER);    this.add(new JScrollPane(status),BorderLayout.SOUTH);    this.setSize(width, height);    this.button.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent arg0) {try {long st = System.currentTimeMillis();AsyncTaskExecutor<Long> executor = new AsyncTaskExecutor<Long>(new MyTask(1000,status),5);long res=0;button.setEnabled(false);for(Future<Long> future:executor.start()){if(!future.isDone()){long temp =future.get().longValue();res+=temp;}}executor.getService().shutdown();status.append("\n執行完成:"+res+" 耗時:"+(System.currentTimeMillis()-st));button.setEnabled(true);}  catch (Exception e) {e.printStackTrace();}}});}    public DefaultTableModel getModel()    {    return (DefaultTableModel) this.table.getModel();    }public static void main(String[] args) {Client client = new Client(300,400);client.setDefaultCloseOperation(Client.EXIT_ON_CLOSE);client.setLocationByPlatform(true);client.setVisible(true);}class MyTask implements Callable<Long>{private int size;private JTextArea area;public MyTask(int size, JTextArea area) {super();this.size = size;this.area = area;}@Overridepublic Long call() throws Exception {long sum = 0;         for (int i = 0; i <= size; i++) {             sum += i;             area.append("\n%"+sum);        }        return sum;         }}}