{"id":10665,"date":"2023-11-28T21:41:01","date_gmt":"2023-11-28T13:41:01","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=10665"},"modified":"2023-12-07T14:40:36","modified_gmt":"2023-12-07T06:40:36","slug":"jvm-de-yin-yong-lei-xing-you-na-xie","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/jvm-de-yin-yong-lei-xing-you-na-xie\/","title":{"rendered":"JVM\u7684\u5f15\u7528\u7c7b\u578b\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"

\u5728 Java \u4e2d\uff0c\u5f15\u7528\u7c7b\u578b\u7528\u4e8e\u63cf\u8ff0\u5bf9\u8c61\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u5b83\u4eec\u5bf9\u5783\u573e\u56de\u6536\u5668\u7684\u884c\u4e3a\u6709\u4e00\u5b9a\u7684\u5f71\u54cd\u3002\u4e3b\u8981\u7684\u5f15\u7528\u7c7b\u578b\u5305\u62ec\u4ee5\u4e0b\u51e0\u79cd\uff1a<\/p>\n

    \n
  1. \n\u5f3a\u5f15\u7528\uff08Strong Reference\uff09\uff1a<\/strong><\/p>\n
      \n
    • \u5f3a\u5f15\u7528\u662f\u6700\u666e\u904d\u7684\u5f15\u7528\u7c7b\u578b\u3002\u5982\u679c\u4e00\u4e2a\u5bf9\u8c61\u5177\u6709\u5f3a\u5f15\u7528\uff0c\u5783\u573e\u56de\u6536\u5668\u5c31\u4e0d\u4f1a\u56de\u6536\u8fd9\u4e2a\u5bf9\u8c61\u3002\u5373\u4f7f\u5185\u5b58\u4e0d\u8db3\uff0cJVM \u4e5f\u4f1a\u5c3d\u53ef\u80fd\u5730\u53bb\u4fdd\u62a4\u6240\u6709\u7684\u5f3a\u5f15\u7528\u5bf9\u8c61\uff0c\u4ee5\u9632\u6b62\u629b\u51fa OutOfMemoryError \u5f02\u5e38\u3002<\/li>\n<\/ul>\n
      Object obj = new Object(); \/\/ \u5f3a\u5f15\u7528\n<\/code><\/pre>\n<\/li>\n
    • \n\u8f6f\u5f15\u7528\uff08Soft Reference\uff09\uff1a<\/strong><\/p>\n
        \n
      • \u8f6f\u5f15\u7528\u7528\u4e8e\u63cf\u8ff0\u4e00\u4e9b\u8fd8\u6709\u7528\u4f46\u5e76\u975e\u5fc5\u9700\u7684\u5bf9\u8c61\u3002\u5728\u7cfb\u7edf\u5c06\u8981\u53d1\u751f\u5185\u5b58\u6ea2\u51fa\u4e4b\u524d\uff0c\u5783\u573e\u56de\u6536\u5668\u4f1a\u5c1d\u8bd5\u56de\u6536\u8f6f\u5f15\u7528\u5bf9\u8c61\u3002\u5982\u679c\u5783\u573e\u56de\u6536\u540e\u8fd8\u662f\u6ca1\u6709\u8db3\u591f\u7684\u5185\u5b58\uff0c\u624d\u4f1a\u629b\u51fa OutOfMemoryError \u5f02\u5e38\u3002<\/li>\n<\/ul>\n
        SoftReference<Object> softRef = new SoftReference<>(new Object()); \/\/ \u8f6f\u5f15\u7528\n<\/code><\/pre>\n<\/li>\n
      • \n\u5f31\u5f15\u7528\uff08Weak Reference\uff09\uff1a<\/strong><\/p>\n
          \n
        • \u5f31\u5f15\u7528\u4e5f\u7528\u4e8e\u63cf\u8ff0\u975e\u5fc5\u9700\u5bf9\u8c61\uff0c\u4f46\u662f\u6bd4\u8f6f\u5f15\u7528\u66f4\u5f31\u3002\u5728\u5783\u573e\u56de\u6536\u65f6\uff0c\u5f31\u5f15\u7528\u5bf9\u8c61\u4f1a\u88ab\u66f4\u79ef\u6781\u5730\u56de\u6536\u3002\u5373\u4f7f\u5728\u5185\u5b58\u8db3\u591f\u7684\u60c5\u51b5\u4e0b\uff0c\u53ea\u8981\u88ab\u5f15\u7528\u7684\u5bf9\u8c61\u53ea\u6709\u5f31\u5f15\u7528\uff0c\u4e5f\u53ef\u80fd\u88ab\u56de\u6536\u3002<\/li>\n<\/ul>\n
          WeakReference<Object> weakRef = new WeakReference<>(new Object()); \/\/ \u5f31\u5f15\u7528\n<\/code><\/pre>\n<\/li>\n
        • \n\u865a\u5f15\u7528\uff08Phantom Reference\uff09\uff1a<\/strong><\/p>\n
            \n
          • \u865a\u5f15\u7528\u662f\u6700\u5f31\u7684\u4e00\u79cd\u5f15\u7528\u5173\u7cfb\u3002\u865a\u5f15\u7528\u51e0\u4e4e\u6ca1\u6709\u76f4\u63a5\u4f5c\u7528\uff0c\u4e3b\u8981\u7528\u4e8e\u5728\u5bf9\u8c61\u88ab\u56de\u6536\u65f6\u63a5\u6536\u4e00\u4e2a\u7cfb\u7edf\u901a\u77e5\u3002\u5728\u88ab\u56de\u6536\u65f6\uff0c\u865a\u5f15\u7528\u4f1a\u88ab\u653e\u5165 ReferenceQueue\uff0c\u53ef\u4ee5\u5728 ReferenceQueue \u4e2d\u5f97\u77e5\u5bf9\u8c61\u88ab\u56de\u6536\u7684\u6d88\u606f\u3002<\/li>\n<\/ul>\n
            PhantomReference<Object> phantomRef = new PhantomReference<>(new Object(), referenceQueue); \/\/ \u865a\u5f15\u7528\n<\/code><\/pre>\n<\/li>\n<\/ol>\n
            \u8fd9\u4e9b\u5f15\u7528\u7c7b\u578b\u63d0\u4f9b\u4e86\u66f4\u7075\u6d3b\u7684\u5bf9\u8c61\u7ba1\u7406\u673a\u5236\uff0c\u5141\u8bb8\u5f00\u53d1\u8005\u5728\u4e0d\u540c\u573a\u666f\u4e0b\u63a7\u5236\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f\u3002\u9700\u8981\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\u548c\u573a\u666f\u9009\u62e9\u9002\u5f53\u7684\u5f15\u7528\u7c7b\u578b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
            \u5728 Java \u4e2d\uff0c\u5f15\u7528\u7c7b\u578b\u7528\u4e8e\u63cf\u8ff0\u5bf9\u8c61\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u5b83\u4eec\u5bf9\u5783\u573e\u56de\u6536\u5668\u7684\u884c\u4e3a\u6709\u4e00\u5b9a\u7684\u5f71\u54cd\u3002\u4e3b\u8981\u7684\u5f15\u7528\u7c7b\u578b\u5305\u62ec\u4ee5\u4e0b\u51e0 […]<\/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-10665","post","type-post","status-publish","format-standard","hentry","category-jvm"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10665","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=10665"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10665\/revisions"}],"predecessor-version":[{"id":16877,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10665\/revisions\/16877"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=10665"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=10665"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=10665"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}