{"id":412,"date":"2019-07-26T18:14:23","date_gmt":"2019-07-26T10:14:23","guid":{"rendered":"http:\/\/47.101.202.111\/?p=412"},"modified":"2022-09-08T16:57:32","modified_gmt":"2022-09-08T08:57:32","slug":"java%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e5%8f%8a%e5%af%b9%e8%b1%a1%e5%bc%95%e7%94%a8%e5%86%85%e5%ad%98%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"http:\/\/139.196.114.170\/?p=412","title":{"rendered":"\u503c\u4f20\u9012\u548c\u5f15\u7528\u4f20\u9012"},"content":{"rendered":"<p>Java\u65b9\u6cd5\u8c03\u7528\u4e2d\u5bf9\u5f62\u53c2\u7684\u66f4\u6539\u662f\u5426\u5f71\u54cd\u5b9e\u53c2\uff1f\u6d89\u53ca\u5230Java\u7684\u65b9\u6cd5\u8c03\u7528\u7684\u4f20\u53c2\u673a\u5236\uff0c\u672c\u6587\u7ed3\u8bba\u662fJava\u4f7f\u7528\u503c\u4f20\u9012\uff0c\u6848\u4f8b\u5206\u6790\u5982\u4e0b\u6587<br \/>\n<!--more--><\/p>\n<h4>\u503c\u4f20\u9012\u548c\u5f15\u7528\u4f20\u9012<\/h4>\n<p>\u503c\u4f20\u9012\u662f\u6307\u5f62\u53c2\u62f7\u8d1d\u4e00\u4efd\u5b9e\u53c2\u7684\u6570\u503c<br \/>\n\u5f15\u7528\u4f20\u9012\u662f\u6307\u5f62\u53c2\u5c31\u662f\u5b9e\u53c2\u5bf9\u8c61\u672c\u8eab<\/p>\n<h4>\u5f62\u53c2\u662f\u72ec\u7acb\u7684\u62f7\u8d1d<\/h4>\n<p>\u65e0\u8bba\u4f20\u9012\u7684\u662f\u57fa\u672c\u7c7b\u578b\u8fd8\u662f\u5f15\u7528\u7c7b\u578b\uff0c<strong>\u5f62\u53c2\u662f\u5bf9\u5b9e\u53c2\u503c\u72ec\u7acb\u7684\u4e00\u4efd\u62f7\u8d1d<\/strong>\uff0c\u610f\u5473\u7740\u5f62\u53c2\u4e0e\u5b9e\u53c2\u5c5e\u4e8e\u4e0d\u540c\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u4fee\u6539\u5f62\u53c2\u4e0d\u5f71\u54cd\u5b9e\u53c2<\/p>\n<pre lang=\"java\">\npublic class Reference {\n    private String string;\n\n    public Reference(String string) {\n        this.string = string;\n    }\n\n    \/\/ getter and setter\n\n    public static void main(String[] args) {\n        test0();\n        test1();\n        test2();\n    }\n}\n<\/pre>\n<ul>\n<li>\u4f20\u9012\u57fa\u672c\u7c7b\u578b\u53c2\u6570<br \/>\n\u5c3d\u7ba1\u65b9\u6cd5\u8c03\u7528\u4e2d\u4fee\u6539\u4e86\u5f62\u53c2\u4e3a1\uff0c\u4f46\u8c03\u7528\u540e\u8fd4\u56de\u539f\u5b9e\u53c2\uff0c\u5b9e\u53c2\u672a\u7ecf\u4fee\u6539<\/li>\n<\/ul>\n<pre><code class=\"language-java \">public static void test0() {\n    int num = 0;\n    invoke0(num);\n    System.out.println(num);\n}\n\npublic static void invoke0(int basic) {\n    System.out.println(basic);\n    basic = 1;\n    System.out.println(basic);\n}\n<\/code><\/pre>\n<pre><code>0\n1\n0\n<\/code><\/pre>\n<ul>\n<li>\u4f20\u9012\u5f15\u7528\u7c7b\u578b\u53c2\u6570<br \/>\n\u5f62\u53c2\u6307\u5411\u65b0\u5f15\u7528\uff0c\u4f46\u5b9e\u53c2\u672a\u7ecf\u66f4\u6539\uff0c\u8bf4\u660e\u5f62\u53c2\u548c\u5b9e\u53c2\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u5185\u5b58\u5730\u5740\u7a7a\u95f4\uff0c\u4fee\u6539\u5404\u81ea\u7684\u5185\u5b58\u4e0d\u5f71\u54cd\u5bf9\u65b9\u7684\u5185\u5b58<\/li>\n<\/ul>\n<pre><code class=\"language-java \">public static void test1() {\n    Reference rParam = new Reference(\"s\");\n    System.out.println(\"before invoke : \" + rParam);\n    invoke1(rParam);\n    System.out.println(\"after invoke : \" + rParam);\n\n}\n\npublic static void invoke1(Reference fParam) {\n    System.out.println(\"before change : \" + fParam);\n    fParam = new Reference(\"s\");\n    System.out.println(\"after change : \" + fParam);\n}\n<\/code><\/pre>\n<pre><code>before invoke : copy.Reference@1b6d3586\nbefore change : copy.Reference@1b6d3586\nafter change : copy.Reference@4554617c\nafter invoke : copy.Reference@1b6d3586\n<\/code><\/pre>\n<h4>\u4fee\u6539\u5f15\u7528\u5185\u5b58\u4f1a\u4fee\u6539\u4e24\u53c2<\/h4>\n<p>\u5b9e\u53c2\u548c\u5f62\u53c2\u4ec5\u662f\u5bf9\u8c61\u5730\u5740\u7684\u5f15\u7528\uff0c\u5f53\u4fee\u6539\u5f15\u7528\u5730\u5740\u7684\u5185\u5b58\u7a7a\u95f4\u65f6\uff0c\u5c06\u5b9e\u9645\u66f4\u6539\u5806\u5185\u5b58\u4e2d\u7684\u5bf9\u8c61<\/p>\n<pre><code class=\"language-java \">public static void test2() {\n    Reference rParam = new Reference(\"s\");\n    System.out.println(\"before invoke : \" + rParam + \" | content : \" +rParam.getString());\n    invoke2(rParam);\n    System.out.println(\"after invoke : \" + rParam + \" | content : \" +rParam.getString());\n}\n\npublic static void invoke2(Reference fParam) {\n    System.out.println(\"before change : \" + fParam + \" | content : \" +fParam.getString());\n    fParam.setString(\"c\");\n    System.out.println(\"after change : \" + fParam + \" | content : \" +fParam.getString());\n}\n<\/code><\/pre>\n<pre><code>before invoke : copy.Reference@1b6d3586 | content : s\nbefore change : copy.Reference@1b6d3586 | content : s\nafter change : copy.Reference@1b6d3586 | content : c\nafter invoke : copy.Reference@1b6d3586 | content : c\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Java\u65b9\u6cd5\u8c03\u7528\u4e2d\u5bf9\u5f62\u53c2\u7684\u66f4\u6539\u662f\u5426\u5f71\u54cd\u5b9e\u53c2\uff1f\u6d89\u53ca\u5230Java\u7684\u65b9\u6cd5\u8c03\u7528\u7684\u4f20\u53c2\u673a\u5236\uff0c\u672c\u6587\u7ed3\u8bba\u662fJava\u4f7f\u7528\u503c\u4f20\u9012\uff0c &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/139.196.114.170\/?p=412\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201c\u503c\u4f20\u9012\u548c\u5f15\u7528\u4f20\u9012\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[25],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/posts\/412"}],"collection":[{"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/139.196.114.170\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=412"}],"version-history":[{"count":18,"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/posts\/412\/revisions"}],"predecessor-version":[{"id":2315,"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/posts\/412\/revisions\/2315"}],"wp:attachment":[{"href":"http:\/\/139.196.114.170\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=412"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/139.196.114.170\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=412"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/139.196.114.170\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=412"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}