Here you can find the source of copy(URL in, File out)
public static void copy(URL in, File out) throws IOException
//package com.java2s; /*/*from w w w . j av a2 s.c o m*/ * Copyright 2011 Eike Kettner * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.URL; public class Main { public static void copy(URL in, File out) throws IOException { InputStream is = in.openStream(); OutputStream os = new FileOutputStream(out); byte[] buffer = new byte[4096]; int len; while ((len = is.read(buffer)) != -1) { os.write(buffer, 0, len); } os.close(); is.close(); } }