JAVA10进制数转45进制

import java.util.HashMap;

public class test2 {

    // 定义45进制数字
    private static final String X45 = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./: ";
    // 拿到45进制转换10进制的值键对
    private static HashMap<Character, Integer> _45To10 = createMap45To10();
    // 拿到10进制转换45进制的值键对
    private static HashMap<Integer, Character> _10To45 = createMap10To45();
    // 定义静态进制数
    private static int BASE = 45;

    private static HashMap<Character, Integer> createMap45To10() {
        HashMap<Character, Integer> map = new HashMap<Character, Integer>();
        for (int i = 0; i < X45.length(); i++) {
            map.put(X45.charAt(i), i);
        }
        return map;
    }

    private static HashMap<Integer, Character> createMap10To45() {
        HashMap<Integer, Character> map = new HashMap<Integer, Character>();
        for (int i = 0; i < X45.length(); i++) {
            map.put(i, X45.charAt(i));
        }
        return map;
    }

    /**
     * 10 to 45
     *
     * @param iSrc
     * @return
     */
    public static String _10To45(int iSrc) {
        String result = "";
        int key;
        int value;
        key = iSrc / BASE;
        value = iSrc - key * BASE;
        if (key != 0) {
            result = result + _10To45(key);
        }
        result = result + _10To45.get(value).toString();
        return result;
    }

    /**
     * 45 to 10
     *
     * @param pStr 45进制字符串
     * @return 十进制
     */
    public static int _45To10(String pStr) {
        if (pStr == "")
            return 0;
        // 目标十进制数初始化为0
        int deciaml = 0;
        // 记录次方,初始为45进制长度 -1
        int power = pStr.length() - 1;
        // 将45进制字符串转换成char[]
        char[] keys = pStr.toCharArray();
        for (int i = 0; i < pStr.length(); i++) {
            // 拿到45进制对应的10进制数
            int value = _45To10.get(keys[i]);
            deciaml = (int) (deciaml + value * Math.pow(BASE, power));
            // 执行完毕 次方自减
            power--;
        }
        return deciaml;
    }


    public static void main(String[] args) {

        int x = _45To10("AAA");
        System.out.println(x);
        //String binStr = Integer.toBinaryString(x);
        //System.out.println(binStr);
        //System.out.println(Integer.parseInt(binStr, 2));

        String s = _10To45(11);
        System.out.println(s);

    }

}

输出：

20710
B