Java Hex Calculate toHexString(int[] x, int bitsPerDigit)

Description

to Hex String

License

Apache License

Declaration

static String toHexString(int[] x, int bitsPerDigit) 

Method Source Code

//package com.java2s;
/**//from  w  ww .j a  v a2  s .  c  o  m
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 {
    static String toHexString(int[] x, int bitsPerDigit) {
        final int digitsPerLong = (59 / bitsPerDigit) + 1;
        final StringBuilder b = new StringBuilder();
        for (int i = 0; i < x.length;) {
            long a = 0;
            int j = 0;
            for (; i < x.length && j < digitsPerLong; j++) {
                a |= ((long) x[i] << (bitsPerDigit * j));
                i++;
            }
            b.insert(0, String.format((i == x.length ? "%" : "%0" + ((bitsPerDigit * j + 3) >> 2)) + "X ", a));
        }
        return b.toString();
    }

    static String toHexString(byte[] bytes, final int digitsPerGroup, final String groupSeparator) {
        if (digitsPerGroup <= 0 || (digitsPerGroup & 1) != 0) {
            throw new IllegalArgumentException(
                    "digitsPerGroup <= 0 || (digitsPerGroup & 1) != 0, digitsPerGroup=" + digitsPerGroup);
        }
        final StringBuilder b = new StringBuilder();
        int r = 0;
        for (int i = bytes.length - 1; i >= 0; i--) {
            b.append(String.format("%2X", bytes[i]));
            if ((r += 2) == digitsPerGroup && i >= 0) {
                r = 0;
                b.append(groupSeparator);
            }
        }
        return b.toString();
    }

    static String toString(int[] x) {
        if (x == null) {
            return "null";
        } else if (x.length == 0) {
            return "<empty>";
        } else {
            final StringBuilder b = new StringBuilder("[");
            b.append(x[0]);
            for (int i = 1; i < x.length; i++) {
                b.append(", ").append(x[i]);
            }
            return b.append("]").toString();
        }
    }

    static String toString(int[] x, int length, int M) {
        final int hexPerDigit = (M + 3) >> 2;
        final StringBuilder b = new StringBuilder();
        for (int i = length - 1; i >= 0; i--) {
            b.append(String.format(" %0" + hexPerDigit + "X", x[i]));
        }
        return b.toString();
    }
}

Related

1. ToHexString(int value, int length)
2. toHexString(int value, int minLength)
3. toHexString(int value, int numDigits)
4. toHexString(int[] data)
5. toHexString(int[] ia)
6. toHexString(Integer num)
7. toHexString(long i)
8. toHexString(long l)
9. toHexString(long l)