Java Hex Calculate toHexString(byte[] value, int startOffset, int maxLength, boolean uppercase, char separator)

Description

to Hex String

License

Apache License

Declaration

public static String toHexString(byte[] value, int startOffset, int maxLength, boolean uppercase,
            char separator) 

Method Source Code

//package com.java2s;
/*//from  w w  w .  j  av a 2 s.c om
 *  Copyright 2006-2015 WebPKI.org (http://webpki.org).
 *
 *  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 {
    public static String toHexString(byte[] value, int startOffset, int maxLength, boolean uppercase,
            char separator) {
        if (maxLength == -1 || startOffset + maxLength > value.length) {
            maxLength = value.length - startOffset;
        }
        StringBuffer r = new StringBuffer(maxLength * (separator == -1 ? 2 : 3));
        for (int i = 0; i < maxLength; i++) {
            if (i > 0 && separator != 0) {
                r.append(separator);
            }
            String t = Integer.toHexString(value[i + startOffset] & 0xFF);
            if (t.length() == 1) {
                t = "0" + t;
            }
            if (uppercase) {
                t = t.toUpperCase();
            }
            r.append(t);
        }
        return r.toString();
    }

    public static String toHexString(byte[] value, int startOffset, int maxLength) {
        return toHexString(value, startOffset, maxLength, true, ' ');
    }

    public static String toHexString(byte[] value) {
        return toHexString(value, 0, -1, true, ' ');
    }

    public static String toHexString(int value, char byteSeparator) {
        return toHexString(new byte[] { (byte) ((value >> 24) & 0xFF), (byte) ((value >> 16) & 0xFF),
                (byte) ((value >> 8) & 0xFF), (byte) (value & 0xFF) }, 0, -1, true, byteSeparator);
    }
}

Related

1. toHexString(byte[] v)
2. toHexString(byte[] v)
3. toHexString(byte[] val)
4. toHexString(byte[] value)
5. toHexString(byte[] value)
6. toHexString(char c)
7. toHexString(final byte b)
8. toHexString(final byte b)
9. toHexString(final byte hex)