{"id":11037,"date":"2023-11-28T21:50:09","date_gmt":"2023-11-28T13:50:09","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=11037"},"modified":"2023-12-07T16:14:32","modified_gmt":"2023-12-07T08:14:32","slug":"jvm-zhong-qiang-yin-yong-ruan-yin-yong-ruo-yin-yon-2","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/jvm-zhong-qiang-yin-yong-ruan-yin-yong-ruo-yin-yon-2\/","title":{"rendered":"JVM\u4e2d\u5f3a\u5f15\u7528\u3001\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528\u3001\u865a\u5f15\u7528\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"

\u5728Java\u4e2d\uff0c\u5f15\u7528\u662f\u7528\u6765\u63cf\u8ff0\u5bf9\u8c61\u548c\u5783\u573e\u56de\u6536\u4e4b\u95f4\u7684\u5173\u7cfb\u7684\u5bf9\u8c61\u3002Java\u4e2d\u7684\u5f15\u7528\u4e3b\u8981\u53ef\u4ee5\u5206\u4e3a\u5f3a\u5f15\u7528\u3001\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528\u3001\u865a\u5f15\u7528\u8fd9\u51e0\u79cd\u3002\u5b83\u4eec\u5728\u5783\u573e\u56de\u6536\u65f6\u7684\u884c\u4e3a\u548c\u751f\u547d\u5468\u671f\u4e0d\u540c\u3002<\/p>\n

    \n
  1. \n\u5f3a\u5f15\u7528\uff08Strong Reference\uff09\uff1a<\/strong> \u5f3a\u5f15\u7528\u662f\u6700\u5e38\u89c1\u7684\u5f15\u7528\u7c7b\u578b\u3002\u5f53\u4e00\u4e2a\u5bf9\u8c61\u88ab\u5f3a\u5f15\u7528\u5173\u8054\u65f6\uff0c\u5783\u573e\u6536\u96c6\u5668\u4e0d\u4f1a\u56de\u6536\u8fd9\u4e2a\u5bf9\u8c61\u3002\u5373\u4f7f\u5185\u5b58\u4e0d\u8db3\u65f6\uff0c\u7cfb\u7edf\u4e5f\u4e0d\u4f1a\u56de\u6536\u88ab\u5f3a\u5f15\u7528\u5173\u8054\u7684\u5bf9\u8c61\u3002\u4f8b\u5982\uff1a<\/p>\n
    Object obj = new Object(); \/\/ \u5f3a\u5f15\u7528\n<\/code><\/pre>\n
    \u5728\u4e0a\u8ff0\u4f8b\u5b50\u4e2d\uff0cobj<\/code>\u662f\u4e00\u4e2a\u5f3a\u5f15\u7528\uff0c\u5783\u573e\u6536\u96c6\u5668\u4e0d\u4f1a\u56de\u6536\u4e0eobj<\/code>\u5173\u8054\u7684\u5bf9\u8c61\u3002\n<\/li>\n
  2. \n\u8f6f\u5f15\u7528\uff08Soft Reference\uff09\uff1a<\/strong> \u8f6f\u5f15\u7528\u7528\u6765\u63cf\u8ff0\u4e00\u4e9b\u8fd8\u6709\u7528\u4f46\u975e\u5fc5\u9700\u7684\u5bf9\u8c61\u3002\u5728\u7cfb\u7edf\u5c06\u8981\u53d1\u751f\u5185\u5b58\u6ea2\u51fa\u4e4b\u524d\uff0c\u4f1a\u56de\u6536\u8f6f\u5f15\u7528\u5173\u8054\u7684\u5bf9\u8c61\u3002\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5185\u5b58\u6ea2\u51fa\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u5065\u58ee\u6027\u3002\u8f6f\u5f15\u7528\u901a\u8fc7SoftReference<\/code>\u7c7b\u6765\u5b9e\u73b0\uff1a<\/p>\n
    SoftReference<Object> softRef = new SoftReference<>(new Object());\n<\/code><\/pre>\n
    \u5f53\u5185\u5b58\u4e0d\u8db3\u65f6\uff0c\u5783\u573e\u6536\u96c6\u5668\u53ef\u80fd\u4f1a\u56de\u6536softRef<\/code>\u5f15\u7528\u7684\u5bf9\u8c61\u3002\n<\/li>\n
  3. \n\u5f31\u5f15\u7528\uff08Weak Reference\uff09\uff1a<\/strong> \u5f31\u5f15\u7528\u7528\u4e8e\u63cf\u8ff0\u975e\u5fc5\u9700\u5bf9\u8c61\u7684\u5f15\u7528\u3002\u4e0e\u8f6f\u5f15\u7528\u7c7b\u4f3c\uff0c\u5f31\u5f15\u7528\u5173\u8054\u7684\u5bf9\u8c61\u5728\u5783\u573e\u56de\u6536\u65f6\u4f1a\u88ab\u56de\u6536\uff0c\u4f46\u5f31\u5f15\u7528\u7684\u751f\u547d\u5468\u671f\u66f4\u77ed\u6682\u3002\u5f31\u5f15\u7528\u901a\u8fc7WeakReference<\/code>\u7c7b\u6765\u5b9e\u73b0\uff1a<\/p>\n
    WeakReference<Object> weakRef = new WeakReference<>(new Object());\n<\/code><\/pre>\n
    \u5f31\u5f15\u7528\u5173\u8054\u7684\u5bf9\u8c61\u53ef\u80fd\u4f1a\u66f4\u5feb\u5730\u88ab\u56de\u6536\uff0c\u5373\u4f7f\u5185\u5b58\u5e76\u4e0d\u7d27\u5f20\u3002\n<\/li>\n
  4. \n\u865a\u5f15\u7528\uff08Phantom Reference\uff09\uff1a<\/strong> \u865a\u5f15\u7528\u662f\u6700\u5f31\u7684\u4e00\u79cd\u5f15\u7528\u5173\u7cfb\u3002\u865a\u5f15\u7528\u65e0\u6cd5\u901a\u8fc7\u5f15\u7528\u83b7\u53d6\u88ab\u5173\u8054\u5bf9\u8c61\uff0c\u4e3b\u8981\u7528\u4e8e\u5728\u5bf9\u8c61\u88ab\u56de\u6536\u65f6\u6536\u5230\u7cfb\u7edf\u901a\u77e5\u3002\u865a\u5f15\u7528\u901a\u8fc7PhantomReference<\/code>\u7c7b\u6765\u5b9e\u73b0\uff1a<\/p>\n
    ReferenceQueue<Object> referenceQueue = new ReferenceQueue<>();\nPhantomReference<Object> phantomRef = new PhantomReference<>(new Object(), referenceQueue);\n<\/code><\/pre>\n
    \u5f53\u5173\u8054\u7684\u5bf9\u8c61\u88ab\u5783\u573e\u56de\u6536\u65f6\uff0cphantomRef<\/code>\u4f1a\u88ab\u653e\u5165referenceQueue<\/code>\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u5904\u7406referenceQueue<\/code>\u6765\u83b7\u53d6\u901a\u77e5\u3002\n<\/li>\n<\/ol>\n
    \u8fd9\u4e9b\u5f15\u7528\u7c7b\u578b\u7684\u9009\u62e9\u53d6\u51b3\u4e8e\u5bf9\u5bf9\u8c61\u751f\u547d\u5468\u671f\u7684\u4e0d\u540c\u9700\u6c42\u3002\u5f3a\u5f15\u7528\u9002\u7528\u4e8e\u786e\u4fdd\u5bf9\u8c61\u4e0d\u4f1a\u88ab\u56de\u6536\u7684\u60c5\u51b5\uff0c\u800c\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528\u3001\u865a\u5f15\u7528\u5219\u63d0\u4f9b\u4e86\u66f4\u7075\u6d3b\u7684\u5783\u573e\u56de\u6536\u63a7\u5236\u673a\u5236\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5728Java\u4e2d\uff0c\u5f15\u7528\u662f\u7528\u6765\u63cf\u8ff0\u5bf9\u8c61\u548c\u5783\u573e\u56de\u6536\u4e4b\u95f4\u7684\u5173\u7cfb\u7684\u5bf9\u8c61\u3002Java\u4e2d\u7684\u5f15\u7528\u4e3b\u8981\u53ef\u4ee5\u5206\u4e3a\u5f3a\u5f15\u7528\u3001\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528 […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[119],"tags":[],"class_list":["post-11037","post","type-post","status-publish","format-standard","hentry","category-jvm"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11037","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=11037"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11037\/revisions"}],"predecessor-version":[{"id":16935,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11037\/revisions\/16935"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=11037"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=11037"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=11037"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}