java多线程有关问题求教

import java.io.File;import java.io.IOException;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import java.util.concurrent.TimeUnit;public class test {    /**     * @param args     * @throws IOException      */        private final static String TEMPDIR = "/home3/boweiy/hadoopdir/temp/";    public static void main(String[] args) throws IOException {        // TODO Auto-generated method stub        FileToNameNodeForExp();            }        public static boolean FileToNameNodeForExp()    {        boolean done = false;        String[] fNames = new File(TEMPDIR).list();                int fn = fNames.length;        System.out.println(fn);        for(int i = 0; i < fn; i++)        {            System.out.println(fNames[i]);            Thread t = new Thread(new UpThread("node2", TEMPDIR + fNames[i]));            t.start();            if(Thread.currentThread().isInterrupted())                System.out.println("Something wrong:" + fNames[i]);        }        return done;    }}class UpThread implements Runnable {    private String namenode;    private String filename;    public UpThread(String namenode, String filename) {        this.namenode = namenode;        this.filename = filename;    }    public void run() {        // TODO Auto-generated method stub        String com = "scp " + filename + " boweiy@" + namenode                + ":/home/boweiy/temp/";                String[] coms = new String[3];        coms[0] = "scp";        coms[1] = filename;        coms[2] = "boweiy@" + namenode+ ":/home/boweiy/temp/";        Process process;        try {            process = Runtime.getRuntime().exec(coms);            process.waitFor();                    } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (InterruptedException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }}