Large files are not getting transferred through file channel

Question

Hi
the below code works fine for files upto 32 mb, but if the file size is more like 141MB, 250MB then the transfer starts but it doesnot get complete. the destination pdf is not opening and acrobat reader says that the pdf has been corrupted
import java.beans.*;
import java.io.Serializable;
import java.io.*;
import java.io.File.*;
import java.util.zip.*;
import java.nio.*;
import java.nio.channels.*;
public class Transfer
   public static void main(String args[]){
     String srcFile = "C:\\\\144 mb.pdf";
     String dstFile = "F:\\144 mb.pdf";
     try{
     FileInputStream in = new FileInputStream(srcFile);
        FileOutputStream out = new FileOutputStream(dstFile);
        FileChannel fcin = in.getChannel();
        FileChannel fcout = out.getChannel();
        long size = fcin.size();
        fcin.transferTo(0, size, fcout);
     }catch(Exception e){
}//close of classwhat could be the reason

Answer 1

below is the code that executes as Task1 when triggered as a thread from Class B
public class C implements Runnable{
    String srcFile = "";
    String dstFile = "";   
    public C (String srcFile,String dstFile){
       this.dstFile =  dstFile;
       this.srcFile =  srcFile;
public void run() {              
try
       FileInputStream in = new FileInputStream(srcFile);
       FileOutputStream out = new FileOutputStream(dstFile);
        FileChannel fcin = in.getChannel();
        FileChannel fcout = out.getChannel();          
        int maxCount = 32 * 1024 * 1024;
        long size = fcin.size();
        long position = 0;
        while (position < size) {
            position += fcin.transferTo(position, maxCount,fcout);
          fcin.close();
          fcout.close();
}catch(IOException ioe)
          System.out.println("FIECOPY SQL ERROR:"+ioe);
catch(Exception e)
          System.out.println("FIECOPY  ERROR IN TRANSFER FILE:"+e);
}below is the code that executes as Task2 when triggered as a thread from Class B
public class D implements Runnable{
    String srcFile="";
    String dstFile="";
    String moveCategory="";
    public  D(String srcFile,String dstFile,String moveCategory){
       this.dstFile =  dstFile;
       this.srcFile =  srcFile;
       this.moveCategory = moveCategory;
public void run(){
try
       FileInputStream in = new FileInputStream(srcFile);
       FileOutputStream out = new FileOutputStream(dstFile);
        FileChannel fcin = in.getChannel();
        FileChannel fcout = out.getChannel();
     int maxCount = 32 * 1024 * 1024;
        long size = fcin.size();
        long position = 0;
        while (position < size) {
            position += fcin.transferTo(position, maxCount,fcout);
          fcin.close();
          fcout.close();
}catch(IOException ioe)
          System.out.println("FIECOPY SQL ERROR:"+ioe);
catch(Exception e)
          System.out.println("FIECOPY  ERROR IN TRANSFER FILE:"+e);
}