Java Double to doubleToHashString(double value)

Description

double To Hash String

License

Apache License

Declaration

public static String doubleToHashString(double value) 

Method Source Code

//package com.java2s;
/*/*  w w w .ja v a  2  s  .  co m*/
 * Copyright 2017 Google Inc.
 *
 * Licensed 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.
 */

public class Main {
    private static final char[] HEX_CHARACTERS = "0123456789abcdef".toCharArray();

    public static String doubleToHashString(double value) {
        StringBuilder sb = new StringBuilder(16);
        long bits = Double.doubleToLongBits(value);
        // We use big-endian to encode the bytes
        for (int i = 7; i >= 0; i--) {
            int byteValue = (int) ((bits >>> (8 * i)) & 0xff);
            int high = ((byteValue >> 4) & 0xf);
            int low = (byteValue & 0xf);
            sb.append(HEX_CHARACTERS[high]);
            sb.append(HEX_CHARACTERS[low]);
        }
        return sb.toString();
    }
}

Related

1. doubleToDoubleArray(double... a)
2. doubleToFloatArray(double[] dArray)
3. doubleToFloatArray(double[] doubles)
4. doubleToFloatMatrix(double[][] matrix)
5. doubleToFractionStr(final Double d)
6. doubleToHexString(double val)
7. doubleToI18nString(double d)
8. doubleToIndex(final double x)
9. doubleToLex(double v)