Here you can find the source of copyFile(File src, File dest)
public static void copyFile(File src, File dest)
//package com.java2s; /*//from w ww . j a va 2 s . c om * Copyright 2003 Federal Chancellery Austria * MOA-ID has been developed in a cooperation between BRZ, the Federal * Chancellery Austria - ICT staff unit, and Graz University of Technology. * * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by * the European Commission - subsequent versions of the EUPL (the "Licence"); * You may not use this work except in compliance with the Licence. * You may obtain a copy of the Licence at: * http://www.osor.eu/eupl/ * * Unless required by applicable law or agreed to in writing, software * distributed under the Licence is distributed on an "AS IS" basis, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the Licence for the specific language governing permissions and * limitations under the Licence. * * This product combines work with different licenses. See the "NOTICE" text * file for details on the various modules and licenses. * The "NOTICE" text file is part of the distribution. Any derivative works * that you distribute must include a readable copy of the "NOTICE" text file. */ import java.io.File; import java.io.FileInputStream; 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 dest) { try { copy(new FileInputStream(src), new FileOutputStream(dest)); } catch (IOException e) { e.printStackTrace(); } } private static void copy(InputStream fis, OutputStream fos) { try { byte[] buffer = new byte[0xFFFF]; for (int len; (len = fis.read(buffer)) != -1;) fos.write(buffer, 0, len); } catch (IOException e) { System.err.println(e); } finally { if (fis != null) try { fis.close(); } catch (IOException e) { e.printStackTrace(); } if (fos != null) try { fos.close(); } catch (IOException e) { e.printStackTrace(); } } } }