Java中的十进制到十六进制转换器

一种可能的解决方案：

import java.lang.StringBuilder;class Test {  private static final int sizeOfIntInHalfBytes = 8;  private static final int numberOfBitsInAHalfByte = 4;  private static final int halfByte = 0x0F;  private static final char[] hexDigits = {     '0', '1', '2', '3', '4', '5', '6', '7',     '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'  };  public static String decToHex(int dec) {    StringBuilder hexBuilder = new StringBuilder(sizeOfIntInHalfBytes);    hexBuilder.setLength(sizeOfIntInHalfBytes);    for (int i = sizeOfIntInHalfBytes - 1; i >= 0; --i)    {      int j = dec & halfByte;      hexBuilder.setCharAt(i, hexDigits[j]);      dec >>= numberOfBitsInAHalfByte;    }    return hexBuilder.toString();   }  public static void main(String[] args) {     int dec = 305445566;     String hex = decToHex(dec);     System.out.println(hex);         }}

输出：

1234BABE

无论如何，对此有一个库方法：

String hex = Integer.toHexString(dec);