Here you can find the source of writeLong(RandomAccessFile raFile, long num)
public static void writeLong(RandomAccessFile raFile, long num) throws IOException
//package com.java2s; /*/*from w w w .j a v a 2s . c o m*/ * #%L * fast-persistent-queue * %% * Copyright (C) 2014 btoddb.com * %% * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * #L% */ import java.io.IOException; import java.io.RandomAccessFile; import java.nio.ByteBuffer; public class Main { public static void writeLong(RandomAccessFile raFile, long num) throws IOException { ByteBuffer bb = ByteBuffer.allocate(8); bb.putLong(num); raFile.write(bb.array()); } }