Java tutorial
//package com.java2s; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; public class Main { public static void copyfile(File src, File dec) { try { if (src == null || dec == null) { return; } InputStream in = new FileInputStream(src); OutputStream out = new FileOutputStream(dec); byte[] buf = new byte[1024]; int len; while ((len = in.read(buf)) > 0) { out.write(buf, 0, len); } in.close(); out.close(); } catch (FileNotFoundException ex) { ex.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } }