在Java中关于二进制、八进制、十六进制的辨析

package com.lingyejun.blog;

public class HexNum {

    public static void main(String[] args) {
        int a10 = 99;
        int a2 = 0b101;
        int a8 = 0143;
        int a16 = 0x63;
        System.out.println(a10);
        System.out.println(a2);
        System.out.println(a8);
        System.out.println(a16);
        int ma10 = -99;
        int ma2 = -0b101;
        int ma8 = -0143;
        int ma16 = -0x63;
        System.out.println(ma10);
        System.out.println(ma2);
        System.out.println(ma8);
        System.out.println(ma16);
        char c = ‘李‘;
        System.out.println("字母A在char中的编号" + Integer.toString(‘A‘) + " " + Integer.toBinaryString(‘A‘));
        System.out.println("字母a在char中的编号" + Integer.toString(‘a‘));
        System.out.println("char 字符 李 用二进制表示为 ：" + Integer.toBinaryString(c));
        System.out.println("char 字符 李 用八进制表示为 ：" + Integer.toOctalString(c));
        System.out.println("char 字符 李 用十六进制表示为 ：" + Integer.toHexString(c));
    }

}