Here you can find the source of inputStream(final File file)
public static InputStream inputStream(final File file) throws IOException
//package com.java2s; /*/*from ww w . ja va 2s . c o m*/ * Copyright (C) 2016 Stefan Hen? * * 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.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.util.zip.GZIPInputStream; public class Main { public static InputStream inputStream(final File file) throws IOException { return file.getName().endsWith(".gz") ? new GZIPInputStream(new FileInputStream(file)) : new FileInputStream(file); } }