{"id":202524,"date":"2025-05-22T08:40:38","date_gmt":"2025-05-22T00:40:38","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202524\/"},"modified":"2025-05-22T08:40:38","modified_gmt":"2025-05-22T00:40:38","slug":"java%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0%e7%b1%bb%e5%9e%8b%e6%98%af%e5%90%a6%e5%8f%af%e4%bb%a5%e5%bc%ba%e5%88%b6%e7%b1%bb%e5%9e%8b%e8%bd%ac%e6%8d%a2%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202524\/","title":{"rendered":"Java\u51fd\u6570\u7684\u53c2\u6570\u7c7b\u578b\u662f\u5426\u53ef\u4ee5\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

Java\u51fd\u6570\u7684\u53c2\u6570\u7c7b\u578b\u662f\u5426\u53ef\u4ee5\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\uff1f<\/h1>\n

\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2a\u6587\u7ae0\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300aJava\u51fd\u6570\u7684\u53c2\u6570\u7c7b\u578b\u662f\u5426\u53ef\u4ee5\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\uff1f\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01<\/p>\n

\u5728 Java \u4e2d\uff0c\u51fd\u6570\u53c2\u6570\u7c7b\u578b\u4e0d\u80fd\u5728\u8fd0\u884c\u65f6\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\uff0c\u56e0\u4e3a\u5b83\u4eec\u5728\u7f16\u8bd1\u65f6\u662f\u56fa\u5b9a\u7684\u3002\u7136\u800c\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u53d8\u901a\u65b9\u6cd5\u5b9e\u73b0\u7c7b\u4f3c\u7684\u6548\u679c\uff1a1. \u4f7f\u7528\u5b50\u7c7b\u5316\uff1b2. \u4f7f\u7528\u5305\u88c5\u5668\u7c7b\u3002<\/p>\n

<\/p>\n

Java \u51fd\u6570\u7684\u53c2\u6570\u7c7b\u578b\u662f\u5426\u53ef\u4ee5\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\uff1f<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u51fd\u6570\u53c2\u6570\u7684\u7c7b\u578b\u5728\u7f16\u8bd1\u65f6\u56fa\u5b9a\uff0c\u56e0\u6b64\u4e0d\u80fd\u5728\u8fd0\u884c\u65f6\u5f3a\u5236\u8f6c\u6362\u4e3a\u5176\u4ed6\u7c7b\u578b\u3002<\/p>\n

\u7c7b\u578b\u68c0\u67e5<\/strong><\/p>\n

\u5f53\u7f16\u8bd1\u5668\u68c0\u67e5 Java \u4ee3\u7801\u65f6\uff0c\u5b83\u4f1a\u68c0\u67e5\u51fd\u6570\u8c03\u7528\u4e2d\u7684\u53c2\u6570\u7c7b\u578b\u662f\u5426\u4e0e\u51fd\u6570\u58f0\u660e\u4e2d\u7684\u7c7b\u578b\u5339\u914d\u3002\u5982\u679c\u53c2\u6570\u7c7b\u578b\u4e0d\u5339\u914d\uff0c\u7f16\u8bd1\u5668\u4f1a\u62a5\u544a\u4e00\u4e2a\u9519\u8bef\u3002<\/p>\n

\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u5c06\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\uff0c\u56e0\u4e3a sum<\/code> \u51fd\u6570\u671f\u671b\u4e24\u4e2a\u6574\u578b\u53c2\u6570\uff0c\u800c\u4f20\u9012\u7684\u662f\u4e00\u4e2a\u6574\u578b\u548c\u4e00\u4e2a\u6d6e\u70b9\u578b\uff1a<\/p>\n

public int sum(int a, int b) {\n  return a + b;\n}\n\npublic static void main(String[] args) {\n  int x = 10;\n  float y = 20.5f;\n  int result = sum(x, y);  \/\/ \u7f16\u8bd1\u9519\u8bef\n}<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u5c3d\u7ba1\u65e0\u6cd5\u76f4\u63a5\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u51fd\u6570\u53c2\u6570\uff0c\u4f46\u6709\u4ee5\u4e0b\u53d8\u901a\u65b9\u6cd5\uff1a<\/p>\n
    \n
  • \u4f7f\u7528\u5b50\u7c7b\u5316\uff1a<\/strong>\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u51fd\u6570\u53c2\u6570\u7c7b\u578b\u7684\u5b50\u7c7b\uff0c\u5c06\u53c2\u6570\u7c7b\u578b\u8f6c\u6362\u4e3a\u5b50\u7c7b\u7c7b\u578b\u3002\u4f8b\u5982\uff0c\u5728\u4e0a\u4f8b\u4e2d\uff0c\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a FloatNumber<\/code> \u5b50\u7c7b\uff0c\u7ee7\u627f\u81ea Number<\/code> \u7c7b\uff0c\u5e76\u91cd\u5199 intValue()<\/code> \u65b9\u6cd5\u4ee5\u8fd4\u56de\u6d6e\u70b9\u6570\u7684\u6574\u6570\u90e8\u5206\u3002<\/li>\n<\/ul>\n
    public class FloatNumber extends Number {\n\n  private float value;\n\n  public FloatNumber(float value) {\n    this.value = value;\n  }\n\n  @Override\n  public int intValue() {\n    return (int) value;\n  }\n\n  \/\/ ... \u5176\u4ed6\u91cd\u5199\u65b9\u6cd5\n}\n\npublic int sum(int a, Number b) {\n  return a + b.intValue();\n}\n\npublic static void main(String[] args) {\n  int x = 10;\n  float y = 20.5f;\n  FloatNumber yAsFloatNumber = new FloatNumber(y);\n  int result = sum(x, yAsFloatNumber);\n}<\/pre>\n
      \n
    • \u4f7f\u7528\u5305\u88c5\u5668\u7c7b\uff1a<\/strong>\u4e5f\u53ef\u4ee5\u4f7f\u7528 Java \u7684\u5305\u88c5\u5668\u7c7b\u6765\u8f6c\u6362\u539f\u59cb\u7c7b\u578b\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528 Float<\/code> \u7c7b\u6765\u5305\u88c5 float<\/code> \u53c2\u6570\uff0c\u5e76\u4f7f\u7528 intValue()<\/code> \u65b9\u6cd5\u5c06\u5176\u8f6c\u6362\u4e3a\u6574\u6570\u3002<\/li>\n<\/ul>\n
      public int sum(int a, Integer b) {\n  return a + b.intValue();\n}\n\npublic static void main(String[] args) {\n  int x = 10;\n  float y = 20.5f;\n  int result = sum(x, (int) y);\n}<\/pre>\n
      \u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aJava\u51fd\u6570\u7684\u53c2\u6570\u7c7b\u578b\u662f\u5426\u53ef\u4ee5\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      Java\u51fd\u6570\u7684\u53c2\u6570\u7c7b\u578b\u662f\u5426\u53ef\u4ee5\u5f3a...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-202524","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202524","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=202524"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202524\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202524"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202524"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202524"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}