java 十进制转十六进制

public class DtoH
{
	public static String reverse(String s) 
	{
        int length = s.length();
        String r = "";
        for (int i = length - 1; i >= 0; i--) 
		{
            r +=s.charAt(i);  //返回指定索引处的char值
        }
        return r;
    }
	public static String DtoH(int n)
	{
		String r = "";   //定义一个字符串变量
		while (n > 0) 
		{
		    int yushu = n % 16;
		    int shang = n / 16;
		    if (yushu > 9)
		    {
			    char c = (char)((yushu - 10) + 'A'); //变成相对应的字符
			    r += c;
		    } 
		    else 
		    {
		        r += yushu;
		    }
			    n = shang;
	    }
		    return reverse(r);
	    }
		public static void main(String[] args) 
	{
		System.out.println(DtoH(1958));
	}
 }