MathUtil.java

package com.dotcool.util;

public class MathUtil
{
    //十进制转十六进制
    public static String DtoX(int d)
    {
        String x = "";
        if (d < 16)
        {
            x = chang(d);
        }
        else
        {
            int c;

            int s = 0;
            int n = d;
            int temp = d;
            while (n >= 16)
            {
                s++;
                n = n / 16;
            }
            String [] m = new String[s];
            int i = 0;
            do
            {
                c = d / 16;
                m[i++] = chang(d % 16);//判断是否大于10，如果大于10，则转换为A~F的格式
                d = c;
            } while (c >= 16);
            x = chang(d);
            for (int j = m.length - 1; j >= 0; j--)
            {
                x += m[j];
            }
        }
        return x;
    }


    //判断是否为10~15之间的数，如果是则进行转换
    public static String chang(int d)
    {
        String x = "";
        switch (d)
        {
            case 10:
                x = "A";
                break;
            case 11:
                x = "B";
                break;
            case 12:
                x = "C";
                break;
            case 13:
                x = "D";
                break;
            case 14:
                x = "E";
                break;
            case 15:
                x = "F";
                break;
            default:
                x = d+"";
                break;
        }
        return x;
    }

}