Java Number Value Of valueOfHexDoubleLiteral(char[] source)

Description

Returns the double value corresponding to the given hexadecimal floating-point double precision literal.

License

Open Source License

Parameter

Parameter	Description
source	source string containing double precision hexadecimal floating-point literal

Return

the double value, including Double.POSITIVE_INFINITY if the non-zero value is too large to be represented, and Double.NaN if the non-zero value is too small to be represented

Declaration

public static double valueOfHexDoubleLiteral(char[] source)

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2004, 2011 IBM Corporation and others.
 * 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://from   ww  w. j av  a 2s  . c o  m
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

public class Main {
    /**
     * Returns the double value corresponding to the given hexadecimal floating-point double precision literal. The literal must be
     * syntactially correct, and must be a double literal (end in an optional 'd' or 'D'). It must not include either leading or
     * trailing whitespace or a sign.
     * <p>
     * This method returns the same answer as Double.parseDouble(new String(source)) does in JDK 1.5, except that this method throw
     * NumberFormatException in the case of overflow to infinity or underflow to 0. The method handles all the tricky cases,
     * including fraction rounding to 53 bits and gradual underflow.
     * </p>
     *
     * @param source
     *         source string containing double precision hexadecimal floating-point literal
     * @return the double value, including Double.POSITIVE_INFINITY if the non-zero value is too large to be represented, and
     *         Double.NaN if the non-zero value is too small to be represented
     */
    public static double valueOfHexDoubleLiteral(char[] source) {
        return Double.parseDouble(new String(source));
        // TODO use math library to correct parse double value
        // long bits = convertHexFloatingPointLiteralToBits(source);
        // return MathUtil.longBitsToDouble(bits);
    }
}