{"id":65809,"date":"2025-05-03T17:37:11","date_gmt":"2025-05-03T09:37:11","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65809\/"},"modified":"2025-05-03T17:37:11","modified_gmt":"2025-05-03T09:37:11","slug":"java%e5%ba%95%e5%b1%82%e6%80%8e%e4%b9%88%e5%ae%9e%e7%8e%b0%e6%95%b0%e7%bb%84%e7%9a%84-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65809\/","title":{"rendered":"java\u5e95\u5c42\u600e\u4e48\u5b9e\u73b0\u6570\u7ec4\u7684"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u6570\u7ec4\u7684\u5e95\u5c42\u5b9e\u73b0\u57fa\u4e8e\u8fde\u7eed\u5185\u5b58\u5206\u914d\uff1ajvm \u5728\u5806\u4e2d\u5206\u914d\u8fde\u7eed\u5185\u5b58\u7a7a\u95f4\uff0c\u5927\u5c0f\u53d6\u51b3\u4e8e\u6570\u7ec4\u957f\u5ea6\u548c\u5143\u7d20\u7c7b\u578b\u5360\u7528\u7684\u5b57\u8282\u6570\u3002\u5143\u7d20\u901a\u8fc7\u4ece 0 \u5f00\u59cb\u7684\u7d22\u5f15\u8bbf\u95ee\uff0c\u8be5\u7d22\u5f15\u7528\u4e8e\u8ba1\u7b97\u8bbf\u95ee\u5143\u7d20\u7684\u5185\u5b58\u504f\u79fb\u91cf\u3002\u6570\u7ec4\u5728 java \u5c42\u9762\u88ab\u89c6\u4e3a\u5f15\u7528\u7c7b\u578b\uff0c\u6307\u5411\u6570\u7ec4\u5185\u5b58\u5730\u5740\u3002\u6570\u7ec4\u5bf9\u8c61\u5b58\u50a8\u957f\u5ea6\u3001\u5143\u7d20\u7c7b\u578b\u548c\u5185\u5b58\u5730\u5740\u7b49\u5143\u6570\u636e\u4fe1\u606f\u3002\u4f8b\u5982\uff0c\u957f\u5ea6\u4e3a 5 \u7684 int \u578b\u6570\u7ec4\u5c06\u5206\u914d 20 \u5b57\u8282\u7684\u8fde\u7eed\u5185\u5b58\u7a7a\u95f4\uff0c\u6570\u7ec4\u5bf9\u8c61\u5305\u542b\u957f\u5ea6\u4e3a 5\u3001\u5143\u7d20\u7c7b\u578b\u4e3a int \u548c\u6307\u5411\u5185\u5b58\u8d77\u59cb\u5730\u5740\u7684\u4fe1\u606f\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111311130548932.jpg\" class=\"aligncenter\" title=\"java\u5e95\u5c42\u600e\u4e48\u5b9e\u73b0\u6570\u7ec4\u7684\u63d2\u56fe\" alt=\"java\u5e95\u5c42\u600e\u4e48\u5b9e\u73b0\u6570\u7ec4\u7684\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e2d\u6570\u7ec4\u7684\u5e95\u5c42\u5b9e\u73b0<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u6570\u7ec4\u662f\u4e00\u79cd\u57fa\u672c\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u76f8\u540c\u7c7b\u578b\u5143\u7d20\u7684\u96c6\u5408\u3002\u5b83\u7684\u5e95\u5c42\u5b9e\u73b0\u57fa\u4e8e <strong>\u8fde\u7eed\u5185\u5b58\u7a7a\u95f4<\/strong> \u7684\u5206\u914d\u3002<\/p>\n<p><strong>\u5185\u5b58\u5206\u914d<\/strong><\/p>\n<p>\u5f53\u521b\u5efa\u4e00\u4e2a\u6570\u7ec4\u65f6\uff0cJava \u865a\u62df\u673a (JVM) \u4f1a\u5728\u5806\u5185\u5b58\u4e2d\u5206\u914d\u4e00\u5757\u8fde\u7eed\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u4ee5\u5bb9\u7eb3\u6570\u7ec4\u5143\u7d20\u3002\u8fd9\u4e2a\u5185\u5b58\u7a7a\u95f4\u7684\u5927\u5c0f\u53d6\u51b3\u4e8e\u6570\u7ec4\u7684\u957f\u5ea6\u548c\u5143\u7d20\u7684\u6570\u636e\u7c7b\u578b\u5360\u7528\u5b57\u8282\u7684\u5927\u5c0f\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p><strong>\u7d22\u5f15\u8bbf\u95ee<\/strong><\/p>\n<p>\u6570\u7ec4\u5143\u7d20\u53ef\u4ee5\u901a\u8fc7\u5176 <strong>\u7d22\u5f15<\/strong> \u8bbf\u95ee\uff0c\u7d22\u5f15\u662f\u4ece 0 \u5f00\u59cb\u7684\u6574\u6570\u3002\u6bcf\u4e2a\u5143\u7d20\u5360\u636e\u56fa\u5b9a\u5927\u5c0f\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u5e76\u4e14\u53ef\u4ee5\u6839\u636e\u5176\u7d22\u5f15\u4f7f\u7528\u504f\u79fb\u91cf\u8fdb\u884c\u8bbf\u95ee\u3002\u4f8b\u5982\uff0c\u6570\u7ec4\u5143\u7d20 array[i] \u5b58\u50a8\u5728\u8d77\u59cb\u5730\u5740 arrayMemoryAddr \u504f\u79fb i * elementSize \u5b57\u8282\u5904\u3002<\/p>\n<p><strong>Java \u8bed\u8a00\u5c42<\/strong><\/p>\n<p>\u5728 Java \u8bed\u8a00\u5c42\uff0c\u6570\u7ec4\u88ab\u89c6\u4e3a\u5f15\u7528\u7c7b\u578b\u3002\u8fd9\u610f\u5473\u7740\u6570\u7ec4\u53d8\u91cf\u5b58\u50a8\u7684\u662f\u6570\u7ec4\u5143\u7d20\u7684\u5185\u5b58\u5730\u5740\u3002\u5f53\u4f7f\u7528\u6570\u7ec4\u65f6\uff0cJava \u7f16\u8bd1\u5668\u4f1a\u5c06\u6570\u7ec4\u8bbf\u95ee\u7ffb\u8bd1\u6210\u5bf9\u5e95\u5c42\u5185\u5b58\u5730\u5740\u7684\u64cd\u4f5c\u3002<\/p>\n<p><strong>\u6570\u7ec4\u5bf9\u8c61<\/strong><\/p>\n<p>\u4e3a\u4e86\u652f\u6301\u6570\u7ec4\u7684\u5143\u6570\u636e\u4fe1\u606f\uff0c\u5982\u957f\u5ea6\u548c\u5143\u7d20\u7c7b\u578b\uff0cJava \u4e2d\u7684\u6570\u7ec4\u88ab\u5b9e\u73b0\u4e3a\u5bf9\u8c61\u3002\u8fd9\u4e2a\u6570\u7ec4\u5bf9\u8c61\u79f0\u4e3a <strong>\u6570\u7ec4\u5bf9\u8c61<\/strong>\uff0c\u5b83\u5b58\u50a8\u4ee5\u4e0b\u4fe1\u606f\uff1a<\/p>\n<ul>\n<li>\u6570\u7ec4\u957f\u5ea6<\/li>\n<li>\u5143\u7d20\u7c7b\u578b<\/li>\n<li>\u6570\u7ec4\u5143\u7d20\u7684\u5185\u5b58\u5730\u5740<\/li>\n<\/ul>\n<p><strong>\u793a\u4f8b<\/strong><\/p>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a 5 \u7684 int \u578b\u6570\u7ec4\uff1a<\/p>\n<pre>int[] myArray = new int[5];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>JVM \u4f1a\u5206\u914d\u4e00\u5757\u5927\u5c0f\u4e3a 5 * 4 (int \u7684\u5b57\u8282\u5927\u5c0f) \u5b57\u8282\u7684\u8fde\u7eed\u5185\u5b58\u7a7a\u95f4\u6765\u5b58\u50a8\u8be5\u6570\u7ec4\u3002\u6570\u7ec4\u5bf9\u8c61\u5c06\u5305\u542b\u4ee5\u4e0b\u4fe1\u606f\uff1a<\/p>\n<ul>\n<li>\u957f\u5ea6\uff1a5<\/li>\n<li>\u5143\u7d20\u7c7b\u578b\uff1aint<\/li>\n<li>\u5185\u5b58\u5730\u5740\uff1a\u6307\u5411\u6570\u7ec4\u5185\u5b58\u7a7a\u95f4\u8d77\u59cb\u5730\u5740<\/li>\n<\/ul>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>Java \u4e2d\u6570\u7ec4\u7684\u5e95\u5c42\u5b9e\u73b0\u57fa\u4e8e\u8fde\u7eed\u5185\u5b58\u7a7a\u95f4\u7684\u5206\u914d\u3002\u6570\u7ec4\u5143\u7d20\u53ef\u4ee5\u901a\u8fc7\u5176\u7d22\u5f15\u8bbf\u95ee\uff0c\u800c\u6570\u7ec4\u5bf9\u8c61\u5219\u5b58\u50a8\u6570\u7ec4\u7684\u5143\u6570\u636e\u4fe1\u606f\u3002\u8fd9\u79cd\u5b9e\u73b0\u63d0\u4f9b\u4e86\u9ad8\u6548\u7684\u6570\u7ec4\u8bbf\u95ee\uff0c\u5e76\u65b9\u4fbf\u4e86\u6570\u7ec4\u64cd\u4f5c\u5728\u8bed\u8a00\u5c42\u9762\u7684\u4f7f\u7528\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u5e95\u5c42\u600e\u4e48\u5b9e\u73b0\u6570\u7ec4\u7684\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>java \u4e2d\u6570\u7ec4\u7684\u5e95\u5c42\u5b9e\u73b0\u57fa\u4e8e\u8fde\u7eed\u5185\u5b58\u5206\u914d\uff1ajvm \u5728\u5806\u4e2d\u5206\u914d\u8fde\u7eed\u5185\u5b58\u7a7a\u95f4\uff0c\u5927\u5c0f\u53d6\u51b3\u4e8e\u6570\u7ec4\u957f\u5ea6\u548c\u5143\u7d20\u7c7b\u578b\u5360\u7528\u7684\u5b57\u8282\u6570\u3002\u5143\u7d20\u901a\u8fc7\u4ece 0 \u5f00\u59cb\u7684\u7d22\u5f15\u8bbf\u95ee\uff0c\u8be5\u7d22\u5f15\u7528\u4e8e\u8ba1\u7b97\u8bbf\u95ee\u5143\u7d20\u7684\u5185\u5b58\u504f\u79fb\u91cf\u3002\u6570\u7ec4\u5728 java \u5c42\u9762\u88ab\u89c6\u4e3a\u5f15\u7528\u7c7b\u578b\uff0c\u6307\u5411\u6570\u7ec4\u5185\u5b58\u5730\u5740\u3002\u6570\u7ec4\u5bf9\u8c61\u5b58\u50a8\u957f\u5ea6\u3001\u5143\u7d20\u7c7b\u578b\u548c\u5185\u5b58\u5730\u5740\u7b49\u5143\u6570\u636e\u4fe1\u606f\u3002\u4f8b\u5982\uff0c\u957f\u5ea6\u4e3a 5 \u7684 int \u578b\u6570\u7ec4\u5c06\u5206\u914d 20 \u5b57\u8282\u7684\u8fde\u7eed\u5185\u5b58\u7a7a\u95f4\uff0c\u6570\u7ec4\u5bf9\u8c61\u5305\u542b\u957f\u5ea6\u4e3a 5\u3001\u5143\u7d20\u7c7b\u578b\u4e3a int \u548c\u6307\u5411\u5185\u5b58\u8d77\u59cb\u5730\u5740\u7684\u4fe1\u606f\u3002 Java \u4e2d\u6570\u7ec4\u7684\u5e95\u5c42\u5b9e\u73b0 \u5728 Java \u4e2d\uff0c\u6570\u7ec4\u662f\u4e00\u79cd\u57fa\u672c\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u76f8\u540c\u7c7b\u578b\u5143\u7d20\u7684\u96c6\u5408\u3002\u5b83\u7684\u5e95\u5c42\u5b9e\u73b0\u57fa\u4e8e \u8fde\u7eed\u5185\u5b58\u7a7a\u95f4 \u7684\u5206\u914d\u3002 \u5185\u5b58\u5206\u914d \u5f53\u521b\u5efa\u4e00\u4e2a\u6570\u7ec4\u65f6\uff0cJava \u865a\u62df\u673a (JVM) \u4f1a\u5728\u5806\u5185\u5b58\u4e2d\u5206\u914d\u4e00\u5757\u8fde\u7eed\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u4ee5\u5bb9\u7eb3\u6570\u7ec4\u5143\u7d20\u3002\u8fd9\u4e2a\u5185\u5b58\u7a7a\u95f4\u7684\u5927\u5c0f\u53d6\u51b3\u4e8e\u6570\u7ec4\u7684\u957f\u5ea6\u548c\u5143\u7d20\u7684\u6570\u636e\u7c7b\u578b\u5360\u7528\u5b57\u8282\u7684\u5927\u5c0f\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u7d22\u5f15\u8bbf\u95ee \u6570\u7ec4\u5143\u7d20\u53ef\u4ee5\u901a\u8fc7\u5176 \u7d22\u5f15 \u8bbf\u95ee\uff0c\u7d22\u5f15\u662f\u4ece 0 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\u4e3a\u4e86\u652f\u6301\u6570\u7ec4\u7684\u5143\u6570\u636e\u4fe1\u606f\uff0c\u5982\u957f\u5ea6\u548c\u5143\u7d20\u7c7b\u578b\uff0cJava \u4e2d\u7684\u6570\u7ec4\u88ab\u5b9e\u73b0\u4e3a\u5bf9\u8c61\u3002\u8fd9\u4e2a\u6570\u7ec4\u5bf9\u8c61\u79f0\u4e3a \u6570\u7ec4\u5bf9\u8c61\uff0c\u5b83\u5b58\u50a8\u4ee5\u4e0b\u4fe1\u606f\uff1a \u6570\u7ec4\u957f\u5ea6 \u5143\u7d20\u7c7b\u578b 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