{"id":112,"date":"2004-09-25T19:39:00","date_gmt":"2004-09-25T03:39:00","guid":{"rendered":"http:\/\/www.zhangling.org\/blog\/20040925\/nacoojavauieia.html"},"modified":"2009-03-05T01:51:50","modified_gmt":"2009-03-04T17:51:50","slug":"nacoojavauieia","status":"publish","type":"post","link":"https:\/\/www.zhangling.org\/blog\/20040925\/nacoojavauieia.html","title":{"rendered":"\u60ed\u6127\uff0c\u4e00\u4e2aJava\u57fa\u672c\u95ee\u9898"},"content":{"rendered":"<p>Java\u5bf9\u6240\u6709\u5bf9\u8c61\u578b\u53c2\u6570\u7684\u4f20\u9012\u90fd\u662f\u4f20\u5f15\u7528\u7684\uff08by reference\uff09\uff0c\u5728\u4f20\u5165\u7684\u51fd\u6570\u4f53\u5185\u4fee\u6539\u8be5\u5bf9\u8c61\u4f1a\u5bf9\u6307\u5411\u8be5\u5bf9\u8c61\u7684\u6240\u6709instance\u8fdb\u884c\u4fee\u6539\u3002\u4f46\u5982\u679c\u662f\u521b\u5efa\u4e00\u4e2a\u65b0instance\u7ed9\u8be5\u5bf9\u8c61\u5462\uff1f\u5982\uff1a<\/p>\n<p><font color=\"#0000ff\">Vector v = new Vector();<\/font><\/p>\n<p><font color=\"#0000ff\">v.addElement(&#8220;a&#8221;);<\/font><\/p>\n<p><font color=\"#0000ff\">change(v);<\/font><\/p>\n<p><font color=\"#0000ff\">System.out.println(v.size());<\/font><\/p>\n<p>..<\/p>\n<p><font color=\"#0000ff\">private void change(vector v) {<\/font><\/p>\n<p><font color=\"#0000ff\">v= new Vector();<\/font><\/p>\n<p><font color=\"#0000ff\">}<\/font><\/p>\n<p><font color=\"#000000\">\u6700\u540e\u7684\u6253\u5370\u7ed3\u679c\u662f1\uff0c\u5373\u5728\u51fd\u6570\u5185\u521b\u5efa\u65b0\u5b9e\u4f8b\u7684\u8bdd\u5e76\u4e0d\u5f71\u54cd\u51fd\u6570\u4f53\u5916\u7684\u53d8\u91cf\u3002\u8fd9\u4e2asample\u662f\u6211\u5728Fowler\u7684Refactor\u4e00\u4e66\u91cc\u770b\u5230\u7684\uff0c\u5f53\u65f6\u5c31\u5199\u4e86\u4e2a\u4f8b\u5b50\u9a8c\u8bc1\uff0c\u679c\u7136\u3002\u60ed\u6127\uff0c\u5199\u4e86\u8fd9\u4e48\u591a\u5e74\u7a0b\u5e8f\uff0c\u8fd9\u4e2a\u95ee\u9898\u5c45\u7136\u5230\u4eca\u5929\u624d\u53d1\u73b0\u3002<\/font><\/p>\n<\/p>\n<div class=\"operation\">\n<a name=\"comment\"><H3>\u56de\u590d<\/H3><\/a>\n <\/div>\n<p><!--2dac1e195b75095434653b30d1641c25--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u5bf9\u6240\u6709\u5bf9\u8c61\u578b\u53c2\u6570\u7684\u4f20\u9012\u90fd\u662f\u4f20\u5f15\u7528\u7684\uff08by reference\uff09\uff0c\u5728\u4f20\u5165\u7684\u51fd\u6570\u4f53\u5185\u4fee\u6539\u8be5\u5bf9\u8c61\u4f1a\u5bf9\u6307\u5411\u8be5\u5bf9\u8c61\u7684\u6240\u6709instance\u8fdb\u884c\u4fee\u6539\u3002\u4f46\u5982\u679c\u662f\u521b\u5efa\u4e00\u4e2a\u65b0instance\u7ed9\u8be5\u5bf9\u8c61\u5462\uff1f\u5982\uff1a Vector v = new Vector(); v.addElement(&#8220;a&#8221;); change(v); System.out.println(v.size()); .. private void change(vector v) { v= new Vector(); } \u6700\u540e\u7684\u6253\u5370\u7ed3\u679c\u662f1\uff0c\u5373\u5728\u51fd\u6570\u5185\u521b\u5efa\u65b0\u5b9e\u4f8b\u7684\u8bdd\u5e76\u4e0d\u5f71\u54cd\u51fd\u6570\u4f53\u5916\u7684\u53d8\u91cf\u3002\u8fd9\u4e2asample\u662f\u6211\u5728Fowler\u7684Refactor\u4e00\u4e66\u91cc\u770b\u5230\u7684\uff0c\u5f53\u65f6\u5c31\u5199\u4e86\u4e2a\u4f8b\u5b50\u9a8c\u8bc1\uff0c\u679c\u7136\u3002\u60ed\u6127\uff0c\u5199\u4e86\u8fd9\u4e48\u591a\u5e74\u7a0b\u5e8f\uff0c\u8fd9\u4e2a\u95ee\u9898\u5c45\u7136\u5230\u4eca\u5929\u624d\u53d1\u73b0\u3002 \u56de\u590d<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-112","post","type-post","status-publish","format-standard","hentry","category-tech"],"_links":{"self":[{"href":"https:\/\/www.zhangling.org\/blog\/wp-json\/wp\/v2\/posts\/112","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zhangling.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhangling.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhangling.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhangling.org\/blog\/wp-json\/wp\/v2\/comments?post=112"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangling.org\/blog\/wp-json\/wp\/v2\/posts\/112\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangling.org\/blog\/wp-json\/wp\/v2\/media?parent=112"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangling.org\/blog\/wp-json\/wp\/v2\/categories?post=112"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangling.org\/blog\/wp-json\/wp\/v2\/tags?post=112"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}