Here you can find the source of appendHex(StringBuilder buf, int value, int width)
| Parameter | Description |
|---|---|
| buf | The buffer to be updated. |
| value | The value to be converted. |
| width | Size of the field that will hold the value. If the hex representation of the value is smaller, it will be left-zero-padded; if greater, the high-order bits will be truncated. |
public static StringBuilder appendHex(StringBuilder buf, int value, int width)
//package com.java2s; // Licensed under the Apache License, Version 2.0 (the "License"); public class Main { private final static char[] NIBBLES = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; /**//from w w w.java 2s .c om * Converts the passed value into hexadecimal representation, and appends * that representation to the buffer, left-zero-padded. * * @param buf The buffer to be updated. * @param value The value to be converted. * @param width Size of the field that will hold the value. If the hex * representation of the value is smaller, it will be * left-zero-padded; if greater, the high-order bits will * be truncated. */ public static StringBuilder appendHex(StringBuilder buf, int value, int width) { appendRepeat(buf, '0', width); int offset = buf.length(); for (int ii = 1; ii <= width; ii++) { int nibble = value & 0xF; buf.setCharAt(offset - ii, NIBBLES[nibble]); value >>>= 4; } return buf; } /** * Appends N copies of the same character to the end of a builder. */ public static StringBuilder appendRepeat(StringBuilder buf, char c, int count) { buf.ensureCapacity(buf.length() + count); for (int ii = 0; ii < count; ii++) buf.append(c); return buf; } }