字节2-1 算法n 进制转m进制2021-02

小咪咪 2022-11-03 15:28 161阅读 0赞

算法n 进制转m进制:

public class Test25 {
    
        private static String shu = "0123456789abcdefghijklmnopqrstuvwxyz";
    
        public static void main(String[] args) {
            //算法  n 进制转m 进制
            System.out.println('l'-'a'+10);
            String str = "ff";
            int sourceJin = 16;
            int tagJin = 10;
            Test25 test25 = new Test25();
            String exchageNum = test25.exchageNum(str,sourceJin,tagJin);
            System.out.println("exchageNum："+exchageNum);
        }
    
        public String exchageNum(String num,Integer sourceJin,Integer tagJin){
    
            Integer  source10 = getNTo10Object(num,sourceJin);
            if(tagJin == 10){
                return String.valueOf(source10);
            }
            String tagStr = get10ToNObject(source10,tagJin);
            return tagStr;
        }
    
        public Integer getNTo10Object(String str,Integer sourceJin){
            char[] chars = shu.toCharArray();
            int source10 = 0;
            int j = 0;
            // 16->10
            for (int i = str.length() - 1; i >= 0; i--) {
                char indexChar = str.charAt(i);
                String weiStr = indexChar<='9'?indexChar+"":(indexChar-'a')+10+"";
                Integer weiInt = Integer.parseInt(weiStr);
                source10 += weiInt * Math.pow(sourceJin, (j++));
            }
            return source10;
        }
    
        public String get10ToNObject(Integer source10,Integer tagJin){
            char[] chars = shu.toCharArray();
            String tagValue = "";
            while (source10>0){
                int tagwei  = source10%tagJin;
                tagValue= chars[tagwei]+tagValue;
                source10 = source10/tagJin;
            }
            return tagValue;
        }
    }

输出结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NhaTczOTI5NTczMg_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NhaTczOTI5NTczMg_size_16_color_FFFFFF_t_70]: /images/20221023/0f357d0b17bc4803a1ec817f9841d6da.png