BufferedOutputStream : write(byte[] b, int off, int len)

package IO;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;

public class write01 {
    public static void main(String[] args)throws Exception{
        String fromFileName="/org.txt";
        String toFileName="/to.txt";
       
        BufferedInputStream in=new BufferedInputStream(new FileInputStream(fromFileName));
        BufferedOutputStream out=new BufferedOutputStream(new FileOutputStream(toFileName));
       
        byte[] buff=new byte[32*1024];
        int len;
        while((len=in.read(buff))>0){
            out.write(buff,0,len);
        }
        in.close();
        out.close();
    }
}