Java Hex String Create appendHex(final StringBuffer buf, final int i)

Description

append Hex

License

Apache License

Declaration

public static void appendHex(final StringBuffer buf, final int i) 

Method Source Code

//package com.java2s;
/**/*from   ww w  .j  a v  a2  s . c  om*/
 * Copyright 2008 - 2009
 * 
 * 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.
 * 
 * @project loonframework
 * @author chenpeng
 * @email?ceponline@yahoo.com.cn
 * @version 0.1
 */

public class Main {
    private static final String[] hexDigits = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c",
            "d", "e", "f" };

    public static void appendHex(final StringBuffer buf, final int i) {
        buf.append(Integer.toHexString((i >> 24) & 0xff));
        buf.append(Integer.toHexString((i >> 16) & 0xff));
        buf.append(Integer.toHexString((i >> 8) & 0xff));
        buf.append(Integer.toHexString(i & 0xff));
    }

    public static String toHexString(byte[] b) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++) {
            resultSb.append(byteToHexString(b[i]));
        }
        return resultSb.toString();
    }

    public static String toHexString(final int i) {
        StringBuffer buf = new StringBuffer();
        appendHex(buf, i);
        return buf.toString();
    }

    public static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n = 256 + n;
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }
}

Related

1. appendHex(final StringBuffer buf, final byte i)
2. appendHex(int color, StringBuffer buffer)
3. appendHex(StringBuffer buf, int x)
4. appendHex(StringBuffer buffer, byte b)
5. appendHex(StringBuffer buffer, int value)