privatestaticvoidcopyFileUsingFileStreams(Filesource, Filedest) throwsIOException {  
InputStreaminput=null;  
OutputStreamoutput=null;  
try {
input=newFileInputStream(source);
output=newFileOutputStream(dest);    
byte[] buf=newbyte[1024];    
intbytesRead;    
while ((bytesRead=input.read(buf)) >0) {
output.write(buf, 0, bytesRead);
      }
  } finally {
input.close();
output.close();
  }
}

privatestaticvoidcopyFileUsingFileChannels(Filesource, Filedest) throwsIOException {  
FileChannelinputChannel=null;  
FileChanneloutputChannel=null;  
try {
inputChannel=newFileInputStream(source).getChannel();
outputChannel=newFileOutputStream(dest).getChannel();
outputChannel.transferFrom(inputChannel, 0, inputChannel.size());
  } finally {
inputChannel.close();
outputChannel.close();
  }
}

privatestaticvoidcopyFileUsingApacheCommonsIO(Filesource, Filedest)
throwsIOException {
FileUtils.copyFile(source, dest);
}

privatestaticvoidcopyFileUsingJava7Files(Filesource, Filedest)
throwsIOException {  
Files.copy(source.toPath(), dest.toPath());
}