java的字母ASCII 值与 hashcode的关系？？

喜欢ヅ旅行 2023-02-09 14:10 55阅读 0赞

# 概念 #

##   ASCII ： ##

ASCII ((American Standard Code for Information Interchange): 美国信息交换标准代码）是基于[拉丁字母][Link 1]的一套电脑[编码][Link 2]系统，主要用于显示现代[英语][Link 3]和其他[西欧][Link 4]语言。它是最通用的信息交换标准，并等同于[国际][Link 5]标准ISO/IEC 646。ASCII第一次以规范标准的类型发表是在1967年，最后一次更新则是在1986年，到目前为止共定义了128个字符

## hashcode ##

java中，就是把任意长度的输入，通过散列算法，变换成固定长度的输出，该输出就是散列值也可称为 hashcode值

那ASCII 值与 hashcode到底什么关系呢？

猜是没用的

直接上代码

public class ASCIIValue {
        public static void main(String[] args) {
            char[] arr = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
                    'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u',
                    'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F',
                    'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q',
                    'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'};
            System.out.println("运行结果如下：");
            System.out.println("--------------------------------");
            for(int i=0; i<arr.length; i++){
                System.out.println(arr[i] + ":" + (int)arr[i]+",hashcode:" + String.valueOf(arr[i]).hashCode());
            }
        }
    }

运行结果

运行结果如下：
    --------------------------------
    a:97,hashcode:97
    b:98,hashcode:98
    c:99,hashcode:99
    d:100,hashcode:100
    e:101,hashcode:101
    f:102,hashcode:102
    g:103,hashcode:103
    h:104,hashcode:104
    i:105,hashcode:105
    j:106,hashcode:106
    k:107,hashcode:107
    l:108,hashcode:108
    m:109,hashcode:109
    n:110,hashcode:110
    o:111,hashcode:111
    p:112,hashcode:112
    q:113,hashcode:113
    r:114,hashcode:114
    s:115,hashcode:115
    t:116,hashcode:116
    u:117,hashcode:117
    v:118,hashcode:118
    w:119,hashcode:119
    x:120,hashcode:120
    y:121,hashcode:121
    z:122,hashcode:122
    A:65,hashcode:65
    B:66,hashcode:66
    C:67,hashcode:67
    D:68,hashcode:68
    E:69,hashcode:69
    F:70,hashcode:70
    G:71,hashcode:71
    H:72,hashcode:72
    I:73,hashcode:73
    J:74,hashcode:74
    K:75,hashcode:75
    L:76,hashcode:76
    M:77,hashcode:77
    N:78,hashcode:78
    O:79,hashcode:79
    P:80,hashcode:80
    Q:81,hashcode:81
    R:82,hashcode:82
    S:83,hashcode:83
    T:84,hashcode:84
    U:85,hashcode:85
    V:86,hashcode:86
    W:87,hashcode:87
    X:88,hashcode:88
    Y:89,hashcode:89
    Z:90,hashcode:90

根据结果判断，**他们是相等的**

[Link 1]: https://baike.baidu.com/item/%E6%8B%89%E4%B8%81%E5%AD%97%E6%AF%8D/1936851
[Link 2]: https://baike.baidu.com/item/%E7%BC%96%E7%A0%81/80092
[Link 3]: https://baike.baidu.com/item/%E8%8B%B1%E8%AF%AD/109997
[Link 4]: https://baike.baidu.com/item/%E8%A5%BF%E6%AC%A7/3028649
[Link 5]: https://baike.baidu.com/item/%E5%9B%BD%E9%99%85