Question

I have tried to do this with simple Threads and succeded but I believe that using Threadpool I could do the same thing more effeciently:)?
simple threads:

public static class getLogFile implements Runnable {
    private String file;

    public void setFilename(String namefile){
    file=namefile;
    }
    public int run1(String Filenamet) {

    connectToServer(XXX, Filenamet, XXX, XXX, XXX, XXX);//creates a file and downloads it

        return 0;
    }

    public void run() {
            run1(file);
    }

}

in main:
for(x=0 ; x < 36 ; x++){
    String Filename1=Filename+x;
    getLogFile n=new getLogFile();
    n.setFilename(Filename1);
    (new Thread(n)).start();

}

Program connects to the server executes 36 commands(using threadpool/simplethreads?!) at the same time and either downloads 36 result files, than merges them, or maybe it could just write to one file on server and then download it?

1. how to transform this code into threadpools?
2. how to write data to one file from 36 threads?

Answer 1

I can only offer you directions.

In order to use thread pool, look how ServiceExecutor works. Any example from Google will give you enough information. As an example look at:
http://www.deitel.com/articles/java_tutorials/20051126/JavaMultithreading_Tutorial_Part4.html

Concerning writing 36 threads to its own file, or writing into the one file. I cannot say anything about writing by several threads into the same file, but you may use CyclicBarrier to wait event when all threads will finish writing. Example of its using you may find here:
http://download.oracle.com/javase/1.5.0/docs/api/java/util/concurrent/CyclicBarrier.html