Here you can find the source of compareDoubleAgainstLong(double lhs, long rhs)
public static int compareDoubleAgainstLong(double lhs, long rhs)
//package com.java2s; /*// ww w .ja v a2 s . co m * Copyright (c) 2002-2016 "Neo Technology," * Network Engine for Objects in Lund AB [http://neotechnology.com] * * This file is part of Neo4j. * * Neo4j is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.math.BigDecimal; public class Main { private static final long NON_DOUBLE_LONG = 0xFFE0_0000_0000_0000L; public static int compareDoubleAgainstLong(double lhs, long rhs) { if ((NON_DOUBLE_LONG & rhs) != NON_DOUBLE_LONG) { if (Double.isNaN(lhs)) { return +1; } if (Double.isInfinite(lhs)) { return lhs < 0 ? -1 : +1; } return BigDecimal.valueOf(lhs).compareTo(BigDecimal.valueOf(rhs)); } return Double.compare(lhs, rhs); } }