Multi Threading is not working in that why...?

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;



public class FileSpliting {



static byte[] dataBytes1 = new byte[100000000];
static byte[] dataBytes2 = new byte[100000000];



public static void main(String[] args) throws IOException
{
    String filename = "users14.dbf";
    System.out.println("File Name---"+filename);
    File file = new File(filename); 
    System.out.println("size---"+file.length());



long sz=file.length();
int totalChunk=(int) (sz/100000000)+1;
int len = 0;
try {
    InputStream fp = new FileInputStream(file);
    int k=1;
    int i=0;
    int nextBuffer=1;

    while (totalChunk>0) {
        if (nextBuffer == 1)
        {
            len = fp.read(dataBytes1);  //read(dataBytes,(int) ps,1000);
            nextBuffer = 2;
        }
        else
        {
            len = fp.read(dataBytes2);  //read(dataBytes,(int) ps,1000);
            nextBuffer = 1;
        }
        i = i + len;
        System.out.println("Remaining-------------------------"+(sz-i));
        while (Thread.activeCount() == 5)
        {
            Thread.sleep(1);
        }

        if (nextBuffer == 2)
            new NewThread(filename,k,1,len);
        else
            new NewThread(filename,k,2,len);

        k++;
        totalChunk--;
    }
    file=null;
    while (Thread.activeCount() == 2)
    {
        Thread.sleep(1);
    }
    Date date= new Date();
    System.out.println("end of file---"+date);
}catch (Exception e) {
    e.printStackTrace();
}




}
}
class NewThread implements Runnable {
Thread t;
private String filename=null;
private int j;
File file=null;
long len;
private int no;
//byte[] dataBytes1 = new byte[10000000];
FileSpliting fs=new FileSpliting();



NewThread(String filname,int j, int no,long len) {
    this.filename=filname;
    this.j=j;
    //this.dataBytes1=dataBytes1;
    this.len=len;
    this.no=no;
    t = new Thread(this, "file Thread");
    //        System.out.println("Child thread: " + t);
    t.start(); // Start the thread
}
@SuppressWarnings("static-access")
public void run() {



File file1 = new File("ddd/"+j+"_"+filename);
try {
    System.out.println("success---"+file1.createNewFile());
    FileOutputStream myStream = new FileOutputStream(file1);
    if(no==1)
        myStream.write(fs.dataBytes1,0,(int)len);
    else
        myStream.write(fs.dataBytes2,0,(int)len);
    myStream.close();

} catch (Exception e) {
    e.printStackTrace();
}




}
}





			
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