Java tutorial
//package com.java2s; /******************************************************************************* * Copyright (c) 2010 Actuate Corporation. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Actuate Corporation - initial API and implementation *******************************************************************************/ import java.math.BigDecimal; public class Main { protected static final BigDecimal MAX_DOUBLE = new BigDecimal(Double.MAX_VALUE); protected static final BigDecimal MIN_DOUBLE = MAX_DOUBLE.negate().subtract(BigDecimal.ONE); public static boolean isBigNumber(Object number) { if (number == null) { return false; } try { BigDecimal num = getBigDecimal(number); if (num.compareTo(MAX_DOUBLE) == 1 || num.compareTo(MIN_DOUBLE) == -1) { return true; } else { return false; } } catch (Exception e) { return false; } } private static BigDecimal getBigDecimal(Object number) { BigDecimal num = null; if (number instanceof BigDecimal) { num = (BigDecimal) number; } else { num = new BigDecimal(number.toString()); } return num; } }