Here you can find the source of putLong(OutputStream out, final long value, final int fitInBytes)
public static int putLong(OutputStream out, final long value, final int fitInBytes) throws IOException
//package com.java2s; /*/*from w w w. ja va 2 s . c o m*/ * 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 int putLong(OutputStream out, final long value, final int fitInBytes) throws IOException { long tmpValue = value; for (int i = 0; i < fitInBytes; ++i) { out.write((byte) (tmpValue & 0xff)); tmpValue >>>= 8; } return fitInBytes; } }