{"id":67034,"date":"2025-05-03T16:02:44","date_gmt":"2025-05-03T08:02:44","guid":{"rendered":"https:\/\/fwq.ai\/blog\/67034\/"},"modified":"2025-05-03T16:02:44","modified_gmt":"2025-05-03T08:02:44","slug":"java%e6%95%b0%e7%bb%84%e4%b8%8b%e6%a0%87%e8%b6%8a%e7%95%8c%e5%bc%82%e5%b8%b8%e4%bd%86%e7%bc%96%e8%af%91%e6%ad%a3%e5%b8%b8%e6%80%8e%e4%b9%88%e5%8a%9e-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/67034\/","title":{"rendered":"java\u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u5f02\u5e38\u4f46\u7f16\u8bd1\u6b63\u5e38\u600e\u4e48\u529e"},"content":{"rendered":"<blockquote><p>\n  java \u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u5f02\u5e38\u662f\u6307\u8bbf\u95ee\u6570\u7ec4\u4e2d\u4e0d\u5408\u6cd5\u4e0b\u6807\u65f6\u629b\u51fa\u7684\u5f02\u5e38\u3002\u8981\u89e3\u51b3\u6b64\u95ee\u9898\uff0c\u53ef\u4ee5\u91c7\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a\u8303\u56f4\u68c0\u67e5\uff1a\u4f7f\u7528\u6761\u4ef6\u8bed\u53e5\u786e\u4fdd\u4e0b\u6807\u5728\u6570\u7ec4\u8303\u56f4\u5185\u3002\u5f02\u5e38\u5904\u7406\uff1a\u4f7f\u7528 try-catch \u5757\u6355\u83b7\u5f02\u5e38\u5e76\u91c7\u53d6\u76f8\u5e94\u63aa\u65bd\u3002bounds-checking \u6570\u7ec4\uff1a\u4f7f\u7528\u652f\u6301\u8fb9\u754c\u68c0\u67e5\u7684\u5e93\u6216\u8bed\u8a00\u7279\u6027\u3002\u5c0f\u5fc3\u65e0\u6548\u53d8\u91cf\uff1a\u786e\u4fdd\u7528\u4f5c\u4e0b\u6807\u7684\u53d8\u91cf\u59cb\u7ec8\u5305\u542b\u6709\u6548\u7684\u6570\u5b57\u3002\u4f7f\u7528 arrays.copyof\uff1a\u521b\u5efa\u6bd4\u539f\u59cb\u6570\u7ec4\u5927\u7684\u526f\u672c\u65f6\u4f7f\u7528 arrays.copyof \u65b9\u6cd5\u907f\u514d\u4e0b\u6807\u8d8a\u754c\u95ee\u9898\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/18\/2024111815392539621.jpg\" class=\"aligncenter\" title=\"java\u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u5f02\u5e38\u4f46\u7f16\u8bd1\u6b63\u5e38\u600e\u4e48\u529e\u63d2\u56fe\" alt=\"java\u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u5f02\u5e38\u4f46\u7f16\u8bd1\u6b63\u5e38\u600e\u4e48\u529e\u63d2\u56fe\" \/><\/p>\n<p><strong>\u89e3\u51b3 Java \u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u5f02\u5e38\u4f46\u7f16\u8bd1\u6b63\u5e38\u7684\u95ee\u9898<\/strong><\/p>\n<p>Java \u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u5f02\u5e38\u662f\u6307\u8bbf\u95ee\u6570\u7ec4\u4e2d\u4e0d\u5408\u6cd5\u4e0b\u6807\u65f6\u629b\u51fa\u7684\u5f02\u5e38\u3002\u867d\u7136\u7f16\u8bd1\u5668\u65e0\u6cd5\u68c0\u6d4b\u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u95ee\u9898\uff0c\u4f46\u7a0b\u5e8f\u8fd0\u884c\u65f6\u4f1a\u629b\u51fa\u5f02\u5e38\u3002<\/p>\n<p><strong>\u539f\u56e0\uff1a<\/strong><\/p>\n<ul>\n<li>\u8bbf\u95ee\u8d85\u51fa\u4e86\u6570\u7ec4\u6709\u6548\u8303\u56f4\u7684\u4e0b\u6807<\/li>\n<li>\u4f7f\u7528\u8d1f\u6570\u4f5c\u4e3a\u4e0b\u6807<\/li>\n<li>\u4f7f\u7528\u65e0\u6548\u7684\u53d8\u91cf\u4f5c\u4e3a\u4e0b\u6807<\/li>\n<\/ul>\n<p><strong>\uff1a<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<ol>\n<li> <strong>\u8303\u56f4\u68c0\u67e5\uff1a<\/strong>\u5728\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20\u4e4b\u524d\uff0c\u4f7f\u7528\u6761\u4ef6\u8bed\u53e5\u6216\u8fb9\u754c\u68c0\u67e5\u65b9\u6cd5\u786e\u4fdd\u4e0b\u6807\u5728\u6570\u7ec4\u8303\u56f4\u5185\u3002<\/li>\n<li> <strong>\u4f7f\u7528\u5f02\u5e38\u5904\u7406\uff1a<\/strong>\u4f7f\u7528 try-catch \u5757\u6355\u83b7\u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u5f02\u5e38\uff0c\u5e76\u91c7\u53d6\u9002\u5f53\u7684\u63aa\u65bd\uff0c\u4f8b\u5982\u6253\u5370\u9519\u8bef\u6d88\u606f\u6216\u5904\u7406\u5f02\u5e38\u3002<\/li>\n<li> <strong>Bounds-Checking \u6570\u7ec4\uff1a<\/strong>\u4f7f\u7528\u652f\u6301\u8fb9\u754c\u68c0\u67e5\u7684\u5e93\u6216\u8bed\u8a00\u7279\u6027\uff08\u5982 Google Guava \u7684 IntArrays.indexOf\uff09\uff0c\u8fd9\u4e9b\u7279\u6027\u4f1a\u5728\u8bbf\u95ee\u8d85\u51fa\u8303\u56f4\u7684\u4e0b\u6807\u65f6\u629b\u51fa\u5f02\u5e38\u3002<\/li>\n<li> <strong>\u5c0f\u5fc3\u65e0\u6548\u53d8\u91cf\uff1a<\/strong>\u786e\u4fdd\u7528\u4f5c\u4e0b\u6807\u7684\u53d8\u91cf\u59cb\u7ec8\u5305\u542b\u6709\u6548\u7684\u6570\u5b57\uff0c\u5e76\u4e14\u5728\u4f7f\u7528\u524d\u5df2\u6b63\u786e\u521d\u59cb\u5316\u3002<\/li>\n<li> <strong>\u4f7f\u7528 Arrays.copyOf\uff1a<\/strong>\u5982\u679c\u9700\u8981\u521b\u5efa\u6bd4\u539f\u59cb\u6570\u7ec4\u5927\u7684\u526f\u672c\uff0c\u8bf7\u4f7f\u7528 Arrays.copyOf \u65b9\u6cd5\uff0c\u5b83\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u5e76\u8c03\u6574\u957f\u5ea6\uff0c\u907f\u514d\u4e0b\u6807\u8d8a\u754c\u95ee\u9898\u3002<\/li>\n<\/ol>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre>int[] array = new int[5];\n\ntry {\n    int element = array[5]; \/\/ ArrayIndexOutOfBoundsException\n} catch (IndexOutOfBoundsException e) {\n    System.out.println(\"Array index out of bounds\");\n}\n\nint[] copy = Arrays.copyOf(array, 10); \/\/ Creates a new array with a larger length<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u901a\u8fc7\u5e94\u7528\u8fd9\u4e9b\u89e3\u51b3\u65b9\u6848\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u51b3 Java \u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u5f02\u5e38\u5e76\u786e\u4fdd\u7a0b\u5e8f\u7684\u5065\u58ee\u6027\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u5f02\u5e38\u4f46\u7f16\u8bd1\u6b63\u5e38\u600e\u4e48\u529e\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 \u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u5f02\u5e38\u662f\u6307\u8bbf\u95ee\u6570\u7ec4\u4e2d\u4e0d\u5408\u6cd5\u4e0b\u6807\u65f6\u629b\u51fa\u7684\u5f02\u5e38\u3002\u8981\u89e3\u51b3\u6b64\u95ee\u9898\uff0c\u53ef\u4ee5\u91c7\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a\u8303\u56f4\u68c0\u67e5\uff1a\u4f7f\u7528\u6761\u4ef6\u8bed\u53e5\u786e\u4fdd\u4e0b\u6807\u5728\u6570\u7ec4\u8303\u56f4\u5185\u3002\u5f02\u5e38\u5904\u7406\uff1a\u4f7f\u7528 try-catch \u5757\u6355\u83b7\u5f02\u5e38\u5e76\u91c7\u53d6\u76f8\u5e94\u63aa\u65bd\u3002bounds-checking \u6570\u7ec4\uff1a\u4f7f\u7528\u652f\u6301\u8fb9\u754c\u68c0\u67e5\u7684\u5e93\u6216\u8bed\u8a00\u7279\u6027\u3002\u5c0f\u5fc3\u65e0\u6548\u53d8\u91cf\uff1a\u786e\u4fdd\u7528\u4f5c\u4e0b\u6807\u7684\u53d8\u91cf\u59cb\u7ec8\u5305\u542b\u6709\u6548\u7684\u6570\u5b57\u3002\u4f7f\u7528 arrays.copyof\uff1a\u521b\u5efa\u6bd4\u539f\u59cb\u6570\u7ec4\u5927\u7684\u526f\u672c\u65f6\u4f7f\u7528 arrays.copyof \u65b9\u6cd5\u907f\u514d\u4e0b\u6807\u8d8a\u754c\u95ee\u9898\u3002 \u89e3\u51b3 Java \u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u5f02\u5e38\u4f46\u7f16\u8bd1\u6b63\u5e38\u7684\u95ee\u9898 Java \u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u5f02\u5e38\u662f\u6307\u8bbf\u95ee\u6570\u7ec4\u4e2d\u4e0d\u5408\u6cd5\u4e0b\u6807\u65f6\u629b\u51fa\u7684\u5f02\u5e38\u3002\u867d\u7136\u7f16\u8bd1\u5668\u65e0\u6cd5\u68c0\u6d4b\u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u95ee\u9898\uff0c\u4f46\u7a0b\u5e8f\u8fd0\u884c\u65f6\u4f1a\u629b\u51fa\u5f02\u5e38\u3002 \u539f\u56e0\uff1a \u8bbf\u95ee\u8d85\u51fa\u4e86\u6570\u7ec4\u6709\u6548\u8303\u56f4\u7684\u4e0b\u6807 \u4f7f\u7528\u8d1f\u6570\u4f5c\u4e3a\u4e0b\u6807 \u4f7f\u7528\u65e0\u6548\u7684\u53d8\u91cf\u4f5c\u4e3a\u4e0b\u6807 \uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u8303\u56f4\u68c0\u67e5\uff1a\u5728\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20\u4e4b\u524d\uff0c\u4f7f\u7528\u6761\u4ef6\u8bed\u53e5\u6216\u8fb9\u754c\u68c0\u67e5\u65b9\u6cd5\u786e\u4fdd\u4e0b\u6807\u5728\u6570\u7ec4\u8303\u56f4\u5185\u3002 \u4f7f\u7528\u5f02\u5e38\u5904\u7406\uff1a\u4f7f\u7528 try-catch \u5757\u6355\u83b7\u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u5f02\u5e38\uff0c\u5e76\u91c7\u53d6\u9002\u5f53\u7684\u63aa\u65bd\uff0c\u4f8b\u5982\u6253\u5370\u9519\u8bef\u6d88\u606f\u6216\u5904\u7406\u5f02\u5e38\u3002 Bounds-Checking \u6570\u7ec4\uff1a\u4f7f\u7528\u652f\u6301\u8fb9\u754c\u68c0\u67e5\u7684\u5e93\u6216\u8bed\u8a00\u7279\u6027\uff08\u5982 Google Guava \u7684 IntArrays.indexOf\uff09\uff0c\u8fd9\u4e9b\u7279\u6027\u4f1a\u5728\u8bbf\u95ee\u8d85\u51fa\u8303\u56f4\u7684\u4e0b\u6807\u65f6\u629b\u51fa\u5f02\u5e38\u3002 \u5c0f\u5fc3\u65e0\u6548\u53d8\u91cf\uff1a\u786e\u4fdd\u7528\u4f5c\u4e0b\u6807\u7684\u53d8\u91cf\u59cb\u7ec8\u5305\u542b\u6709\u6548\u7684\u6570\u5b57\uff0c\u5e76\u4e14\u5728\u4f7f\u7528\u524d\u5df2\u6b63\u786e\u521d\u59cb\u5316\u3002 \u4f7f\u7528 Arrays.copyOf\uff1a\u5982\u679c\u9700\u8981\u521b\u5efa\u6bd4\u539f\u59cb\u6570\u7ec4\u5927\u7684\u526f\u672c\uff0c\u8bf7\u4f7f\u7528 Arrays.copyOf \u65b9\u6cd5\uff0c\u5b83\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u5e76\u8c03\u6574\u957f\u5ea6\uff0c\u907f\u514d\u4e0b\u6807\u8d8a\u754c\u95ee\u9898\u3002 \u793a\u4f8b\uff1a int[] array = new int[5]; try { int element = array[5]; \/\/ ArrayIndexOutOfBoundsException } catch (IndexOutOfBoundsException e) { System.out.println(&#8220;Array index [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-67034","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/67034","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=67034"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/67034\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=67034"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=67034"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=67034"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}