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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                1.根據ASCII相加得到 ``` /** * hashcode的計算方式為,以31為權重,舉例“java”字符串的計算 * j 的 ASCII碼 為 106 * a 的 ASCII碼 為 97 * v 的 ASCII碼 為 118 * 字符串 va 的 hashcode為 118 * 31 + 97 * 字符串 java 的 hashcode為 106 * 31 * 31 * 31 + 97 * 31 * 31 + 118 * 31 + 97 */ System.out.println(Integer.valueOf('j')); //ASCII碼:106 System.out.println(Integer.valueOf('a')); //ASCII碼:97 System.out.println(Integer.valueOf('v')); //ASCII碼:118 System.out.println(Integer.valueOf('a')); //ASCII碼:97 int hashcode = 106 * 31 * 31 * 31 + 97 * 31 * 31 + 118 * 31 + 97; System.out.println("hashCode計算的值:" + hashcode); //3254818 System.out.println("Objects hashCode:" + Objects.hashCode("java") ); //3254818 System.out.println("String hashCode:" + "java".hashCode()); //3254818 //Objects.hash在上面的計算方式基礎上額外增加了31 System.out.println("Objects hash:" + (3254818 + 31)); //3254849 System.out.println("Objects hash:" + Objects.hash("java") ); //3254849 ```
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