Here you can find the source of closeOutputFile(OutputStream os)
public static void closeOutputFile(OutputStream os) throws IOException
//package com.java2s; /*/* ww w . ja v a 2 s . c om*/ * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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.IOException; import java.io.OutputStream; public class Main { public static void closeOutputFile(OutputStream os) throws IOException { os.flush(); os.close(); os = null; } }