Copy a file

i use FileReader and FileWriter classes to copy a file one place to another place(using readLine() and write() methods).But when i want copy a large file (eg 10Mb) this way it slow down the speed of the machine by taking high processing power. But usually when we use copy and paste in OS it doesn't slow down the machine speed.How can do it without slow down the machine speed?are there any other class in java to do this?

[431 byte] By [chamila1986a] at [2007-11-27 5:45:11]