{"id":129118,"date":"2022-04-17T11:25:50","date_gmt":"2022-04-17T03:25:50","guid":{"rendered":"http:\/\/www.idc.net\/help\/129118\/"},"modified":"2022-04-17T11:25:50","modified_gmt":"2022-04-17T03:25:50","slug":"c%e8%af%ad%e8%a8%80%e4%b8%adlinux%e5%93%88%e5%b8%8c%e6%98%a0%e5%b0%84%e7%9a%84%e5%ae%9e%e7%8e%b0%e6%96%b9%e6%b3%95-c-linux-hash-map","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/129118\/","title":{"rendered":"C\u8bed\u8a00\u4e2dLinux\u54c8\u5e0c\u6620\u5c04\u7684\u5b9e\u73b0\u65b9\u6cd5 (c linux hash map)"},"content":{"rendered":"<p>\u54c8\u5e0c\u6620\u5c04\u662f\u4e00\u79cd\u6570\u636e\u5b58\u50a8\u548c\u67e5\u627e\u7684\u65b9\u5f0f\uff0c\u901a\u8fc7\u5c06\u6570\u636e\u6620\u5c04\u5230\u6570\u7ec4\u4e2d\u7684\u4f4d\u7f6e\u6765\u5feb\u901f\u67e5\u627e\u548c\u64cd\u4f5c\u6570\u636e\uff0c\u54c8\u5e0c\u6620\u5c04\u5728\u8ba1\u7b97\u673a\u9886\u57df\u4e2d\u5e7f\u6cdb\u5e94\u7528\uff0c\u4f8b\u5982\u6570\u636e\u5e93\u3001\u6587\u4ef6\u7cfb\u7edf\u3001\u7f13\u5b58\u7b49\u3002Linux\u5185\u6838\u4e2d\u5b9e\u73b0\u7684\u54c8\u5e0c\u6620\u5c04\u662f\u4e00\u79cd\u9ad8\u6548\u7684\u6570\u636e\u7ed3\u6784\uff0c\u672c\u6587\u5c06\u4ecb\u7ecdLinux\u54c8\u5e0c\u6620\u5c04\u7684\u5b9e\u73b0\u65b9\u6cd5\u3002<\/p>\n<p>\u4e00\u3001\u54c8\u5e0c\u8868\u7684\u57fa\u672c\u539f\u7406<\/p>\n<p>\u54c8\u5e0c\u8868\u662f\u4e00\u79cd\u57fa\u4e8e\u54c8\u5e0c\u51fd\u6570\u5b9e\u73b0\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u901a\u8fc7\u5c06\u4e00\u4e2a\u6570\u636e\u6620\u5c04\u5230\u6570\u7ec4\u4e2d\u7684\u4f4d\u7f6e\u6765\u8fdb\u884c\u5feb\u901f\u7684\u67e5\u627e\u548c\u64cd\u4f5c\u6570\u636e\u3002\u54c8\u5e0c\u51fd\u6570\u5c06\u4e0d\u540c\u8f93\u5165\u6620\u5c04\u5230\u4e0d\u540c\u7684\u8f93\u51fa\uff0c\u56e0\u6b64\uff0c\u4e0d\u540c\u7684\u6570\u636e\u7ecf\u8fc7\u54c8\u5e0c\u51fd\u6570\u6620\u5c04\u5f97\u5230\u7684\u4f4d\u7f6e\u4e0d\u540c\uff0c\u5f53\u6211\u4eec\u67e5\u627e\u6570\u636e\u65f6\uff0c\u5c31\u53ef\u4ee5\u6839\u636e\u54c8\u5e0c\u51fd\u6570\u8ba1\u7b97\u51fa\u8be5\u6570\u636e\u6240\u5728\u7684\u4f4d\u7f6e\uff0c\u5e76\u76f4\u63a5\u8bfb\u53d6\u8be5\u4f4d\u7f6e\u7684\u6570\u636e\uff0c\u56e0\u6b64\uff0c\u54c8\u5e0c\u8868\u7684\u67e5\u627e\u6548\u7387\u975e\u5e38\u9ad8\u3002<\/p>\n<p>\u5b9e\u73b0\u54c8\u5e0c\u8868\u9700\u8981\u89e3\u51b3\u4e24\u4e2a\u95ee\u9898\uff1a\u54c8\u5e0c\u51fd\u6570\u7684\u8bbe\u8ba1\u548c\u54c8\u5e0c\u51b2\u7a81\u7684\u89e3\u51b3\u3002\u54c8\u5e0c\u51fd\u6570\u7684\u8bbe\u8ba1\u51b3\u5b9a\u4e86\u6570\u636e\u5982\u4f55\u6620\u5c04\u5230\u6570\u7ec4\u4e2d\u7684\u4f4d\u7f6e\uff0c\u540c\u65f6\u4e5f\u51b3\u5b9a\u4e86\u54c8\u5e0c\u8868\u7684\u6027\u80fd\u3002\u54c8\u5e0c\u51b2\u7a81\u662f\u6307\u4e0d\u540c\u7684\u6570\u636e\u7ecf\u8fc7\u54c8\u5e0c\u51fd\u6570\u5f97\u5230\u7684\u6570\u7ec4\u4e0b\u6807\u76f8\u540c\uff0c\u6b64\u65f6\u9700\u8981\u7528\u4e00\u79cd\u65b9\u6cd5\u6765\u89e3\u51b3\u8fd9\u79cd\u51b2\u7a81\uff0c\u5e38\u89c1\u7684\u65b9\u6cd5\u5305\u62ec\u94fe\u5f0f\u6cd5\u3001\u5f00\u653e\u5730\u5740\u6cd5\u7b49\u3002<\/p>\n<p>\u4e8c\u3001Linux\u54c8\u5e0c\u6620\u5c04\u7684\u5b9e\u73b0\u65b9\u6cd5<\/p>\n<p>Linux\u5185\u6838\u4e2d\u5b9e\u73b0\u7684\u54c8\u5e0c\u6620\u5c04\u662f\u4e00\u79cd\u9ad8\u6548\u7684\u54c8\u5e0c\u8868\uff0c\u5b83\u91c7\u7528\u4e86\u57fa\u4e8e\u94fe\u8868\u7684\u89e3\u51b3\u54c8\u5e0c\u51b2\u7a81\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u5728\u77ed\u65f6\u95f4\u5185\u9ad8\u6548\u5730\u5b8c\u6210\u6570\u636e\u67e5\u627e\u3001\u6dfb\u52a0\u3001\u5220\u9664\u7b49\u64cd\u4f5c\uff0c\u662fLinux\u5185\u6838\u4e2d\u4e00\u79cd\u5e38\u7528\u7684\u6570\u636e\u7ed3\u6784\u3002<\/p>\n<p>1. \u54c8\u5e0c\u952e\u548c\u54c8\u5e0c\u8868\u7684\u5b9a\u4e49<\/p>\n<p>\u5728Linux\u54c8\u5e0c\u6620\u5c04\u4e2d\uff0c\u6bcf\u4e00\u4e2a\u88ab\u5b58\u50a8\u7684\u6570\u636e\u9879\u90fd\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684\u952e\u503c\uff0c\u88ab\u79f0\u4f5c\u54c8\u5e0c\u952e\u3002\u54c8\u5e0c\u952e\u662f\u4e00\u4e2a\u65e0\u7b26\u53f7\u6574\u6570\uff0c\u901a\u8fc7\u54c8\u5e0c\u51fd\u6570\u6620\u5c04\u5230\u54c8\u5e0c\u8868\u4e2d\u7684\u4e00\u4e2a\u4f4d\u7f6e\u3002\u54c8\u5e0c\u8868\u53ef\u4ee5\u770b\u4f5c\u662f\u4e00\u4e2a\u7531\u6876(bucket)\u6784\u6210\u7684\u6570\u7ec4\uff0c\u6bcf\u4e2a\u6876\u90fd\u662f\u4e00\u6761\u6307\u5411\u54c8\u5e0c\u952e\u76f8\u540c\u7684\u6570\u636e\u9879\u7684\u94fe\u8868\u3002<\/p>\n<p>\u54c8\u5e0c\u8868\u7684\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n<p>\u201c`c<\/p>\n<p>struct hlist_head {<\/p>\n<p> struct hlist_node *first;<\/p>\n<p>};<\/p>\n<p>struct hlist_node {<\/p>\n<p> struct hlist_node *next, **pprev;<\/p>\n<p>};<\/p>\n<p>struct hlist_nulls_head {<\/p>\n<p> struct hlist_nulls_node *first;<\/p>\n<p>};<\/p>\n<p>struct hlist_nulls_node {<\/p>\n<p> struct hlist_nulls_node *next, **pprev;<\/p>\n<p>};<\/p>\n<p>struct hlist_head *htable;<\/p>\n<p>\u201c`<\/p>\n<p>\u5176\u4e2d\uff0c`struct hlist_head`\u7ed3\u6784\u4f53\u8868\u793a\u54c8\u5e0c\u8868\u4e2d\u7684\u4e00\u4e2a\u6876\uff0c`first`\u6210\u5458\u8868\u793a\u8be5\u6876\u7684\u5934\u8282\u70b9\uff1b`struct hlist_node`\u7ed3\u6784\u4f53\u8868\u793a\u54c8\u5e0c\u8868\u4e2d\u7684\u4e00\u4e2a\u8282\u70b9\uff0c`next`\u6210\u5458\u8868\u793a\u8be5\u8282\u70b9\u7684\u4e0b\u4e00\u4e2a\u8282\u70b9\uff0c`pprev`\u6210\u5458\u8868\u793a\u8be5\u8282\u70b9\u7684\u524d\u4e00\u4e2a\u8282\u70b9\u7684`next`\u6210\u5458\uff1b`struct hlist_nulls_head`\u7ed3\u6784\u4f53\u548c`struct hlist_nulls_node`\u7ed3\u6784\u4f53\u662f\u5e26\u6709\u54d1\u8282\u70b9(dummy node)\u7684\u54c8\u5e0c\u5217\u8868\uff0c\u54d1\u8282\u70b9\u4e0d\u5b58\u50a8\u4efb\u4f55\u6570\u636e\uff0c\u4ec5\u4f5c\u4e3a\u5934\u8282\u70b9\u5b58\u5728\u3002<\/p>\n<p>2. \u54c8\u5e0c\u51fd\u6570\u7684\u8bbe\u8ba1<\/p>\n<p>\u54c8\u5e0c\u51fd\u6570\u662f\u5c06\u54c8\u5e0c\u952e\u6620\u5c04\u5230\u54c8\u5e0c\u8868\u4e2d\u7684\u6876\u7684\u4f4d\u7f6e\u7684\u6838\u5fc3\u7b97\u6cd5\uff0c\u6211\u4eec\u9700\u8981\u9009\u62e9\u4e00\u79cd\u9ad8\u6548\u7684\u54c8\u5e0c\u51fd\u6570\uff0c\u4f7f\u5f97\u4e0d\u540c\u7684\u54c8\u5e0c\u952e\u53ef\u4ee5\u5747\u5300\u5730\u5206\u5e03\u5230\u54c8\u5e0c\u8868\u4e2d\u7684\u5404\u4e2a\u6876\u4e2d\uff0c\u4ece\u800c\u907f\u514d\u54c8\u5e0c\u51b2\u7a81\u7684\u53d1\u751f\u3002<\/p>\n<p>\u5728Linux\u54c8\u5e0c\u6620\u5c04\u4e2d\uff0c\u54c8\u5e0c\u51fd\u6570\u7684\u5b9e\u73b0\u4f7f\u7528\u4e86\u4e00\u79cd\u53eb\u505aMurmurHash\u7684\u54c8\u5e0c\u7b97\u6cd5\u3002MurmurHash\u662f\u4e00\u79cd\u9ad8\u6548\u7684\u975e\u52a0\u5bc6\u54c8\u5e0c\u7b97\u6cd5\uff0c\u54c8\u5e0c\u51fd\u6570\u7684\u8bbe\u8ba1\u5982\u4e0b\uff1a<\/p>\n<p>\u201c`c<\/p>\n<p>static inline unsigned int hash_32(unsigned int val, unsigned int bits)<\/p>\n<p>{<\/p>\n<p> \/* On some cpus multiply is faster, on others gcc will do shifts *\/<\/p>\n<p> unsigned int hash = val * GOLDEN_RATIO_PRIME_32;<\/p>\n<p> \/* High bits are more random, so use them. *\/<\/p>\n<p> return hash &gt;&gt; (32 \u2013 bits);<\/p>\n<p>}<\/p>\n<p>static inline unsigned int __hashfunc(unsigned int key, unsigned int bits)<\/p>\n<p>{<\/p>\n<p> return hash_32(key, bits);<\/p>\n<p>}<\/p>\n<p>\u201c`<\/p>\n<p>\u54c8\u5e0c\u51fd\u6570\u4f7f\u7528\u4e86\u4e00\u4e2a\u79f0\u4e3a\u9ec4\u91d1\u6bd4\u4f8b`GOLDEN_RATIO_PRIME_32`\u7684\u503c\u8fdb\u884c\u4e58\u6cd5\u8fd0\u7b97\uff0c\u5e76\u5c06\u7ed3\u679c\u53f3\u79fb\u4e00\u4e9b\u4f4d\u6570\uff0c\u5f97\u51fa\u54c8\u5e0c\u8868\u4e2d\u7684\u6876\u4f4d\u7f6e\uff0c`bits`\u53c2\u6570\u6307\u5b9a\u4e86\u54c8\u5e0c\u8868\u7684\u5927\u5c0f\uff0c\u4e00\u822c\u5c31\u662f\u54c8\u5e0c\u8868\u4e2d\u6876\u7684\u6570\u91cf\u3002<\/p>\n<p>3. \u54c8\u5e0c\u8868\u7684\u64cd\u4f5c<\/p>\n<p>Linux\u54c8\u5e0c\u6620\u5c04\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u51fd\u6570\u6765\u64cd\u4f5c\u54c8\u5e0c\u8868\uff0c\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u51fd\u6570\uff1a<\/p>\n<p>\uff081\uff09`hlist_head *hlist_nulls_init(hlist_head *head);`<\/p>\n<p>\u8be5\u51fd\u6570\u521d\u59cb\u5316\u4e00\u4e2a\u5e26\u6709\u54d1\u8282\u70b9\u7684\u54c8\u5e0c\u5217\u8868\uff0c\u8fd4\u56de\u8be5\u5217\u8868\u7684\u5934\u8282\u70b9\u6307\u9488\u3002<\/p>\n<p>\uff082\uff09`void hlist_nulls_add_head(hlist_node *node, hlist_nulls_head *head);`<\/p>\n<p>\u8be5\u51fd\u6570\u5411\u4e00\u4e2a\u5e26\u6709\u54d1\u8282\u70b9\u7684\u54c8\u5e0c\u5217\u8868\u6dfb\u52a0\u4e00\u4e2a\u8282\u70b9\uff0c\u6dfb\u52a0\u7684\u8282\u70b9\u6210\u4e3a\u8be5\u54c8\u5e0c\u5217\u8868\u7684\u5934\u8282\u70b9\u3002<\/p>\n<p>\uff083\uff09`void hlist_nulls_del(hlist_node *node);`<\/p>\n<p>\u8be5\u51fd\u6570\u5220\u9664\u4e00\u4e2a\u5e26\u6709\u54d1\u8282\u70b9\u7684\u54c8\u5e0c\u5217\u8868\u4e2d\u7684\u4e00\u4e2a\u8282\u70b9\u3002<\/p>\n<p>\uff084\uff09`void hash_init(struct htable *ht);`<\/p>\n<p>\u8be5\u51fd\u6570\u521d\u59cb\u5316\u4e00\u4e2a\u54c8\u5e0c\u8868\u3002<\/p>\n<p>\uff085\uff09`void hash_add(struct htable *ht, struct hnode *node, unsigned long key);`<\/p>\n<p>\u8be5\u51fd\u6570\u5411\u4e00\u4e2a\u54c8\u5e0c\u8868\u6dfb\u52a0\u4e00\u4e2a\u8282\u70b9\uff0c\u5176\u4e2d`node`\u53c2\u6570\u4e3a\u8282\u70b9\u6307\u9488\uff0c`key`\u53c2\u6570\u4e3a\u8be5\u8282\u70b9\u7684\u54c8\u5e0c\u952e\u3002<\/p>\n<p>\uff086\uff09`void hash_del(struct htable *ht, struct hnode *node);`<\/p>\n<p>\u8be5\u51fd\u6570\u4ece\u4e00\u4e2a\u54c8\u5e0c\u8868\u4e2d\u5220\u9664\u4e00\u4e2a\u8282\u70b9\u3002<\/p>\n<p>\uff087\uff09`struct hnode *hash_find(struct htable *ht, unsigned long key);`<\/p>\n<p>\u8be5\u51fd\u6570\u5728\u4e00\u4e2a\u54c8\u5e0c\u8868\u4e2d\u67e5\u627e\u4e00\u4e2a\u6307\u5b9a\u54c8\u5e0c\u952e\u7684\u8282\u70b9\u3002<\/p>\n<p>4. \u4f7f\u7528\u65b9\u6cd5<\/p>\n<p>\u4f7f\u7528Linux\u54c8\u5e0c\u6620\u5c04\u5b9e\u73b0\u6570\u636e\u5b58\u50a8\u5f88\u7b80\u5355\uff0c\u53ea\u9700\u8981\u9075\u5faa\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\u5373\u53ef\uff1a<\/p>\n<p>\uff081\uff09\u5b9a\u4e49\u4e00\u4e2a\u6570\u636e\u7ed3\u6784<\/p>\n<p>\u201c`c<\/p>\n<p>struct my_data {<\/p>\n<p> unsigned int key;<\/p>\n<p> int value;<\/p>\n<p> struct hnode node;<\/p>\n<p>};<\/p>\n<p>\u201c`<\/p>\n<p>\uff082\uff09\u521d\u59cb\u5316\u4e00\u4e2a\u54c8\u5e0c\u8868<\/p>\n<p>\u201c`c<\/p>\n<p>struct htable my_table;<\/p>\n<p>hash_init(&amp;my_table);<\/p>\n<p>\u201c`<\/p>\n<p>\uff083\uff09\u5411\u54c8\u5e0c\u8868\u4e2d\u6dfb\u52a0\u6570\u636e<\/p>\n<p>\u201c`c<\/p>\n<p>struct my_data *data;<\/p>\n<p>data = (struct my_data *)malloc(sizeof(struct my_data));<\/p>\n<p>data-&gt;key = 100;<\/p>\n<p>data-&gt;value = 200;<\/p>\n<p>hash_add(&amp;my_table, &amp;data-&gt;node, data-&gt;key);<\/p>\n<p>\u201c`<\/p>\n<p>\uff084\uff09\u4ece\u54c8\u5e0c\u8868\u4e2d\u67e5\u627e\u6570\u636e<\/p>\n<p>\u201c`c<\/p>\n<p>struct my_data *data;<\/p>\n<p>struct hnode *node;<\/p>\n<p>node = hash_find(&amp;my_table, 100);<\/p>\n<p>if (node) {<\/p>\n<p> data = contner_of(node, struct my_data, node);<\/p>\n<p> printf(\u201cvalue = %d\\n\u201d, data-&gt;value);<\/p>\n<p>}<\/p>\n<p>\u201c`<\/p>\n<p>\uff085\uff09\u4ece\u54c8\u5e0c\u8868\u4e2d\u5220\u9664\u6570\u636e<\/p>\n<p>\u201c`c<\/p>\n<p>struct hnode *node;<\/p>\n<p>node = hash_find(&amp;my_table, 100);<\/p>\n<p>if (node) {<\/p>\n<p> hash_del(&amp;my_table, node);<\/p>\n<p> free(contner_of(node, struct my_data, node));<\/p>\n<p>}<\/p>\n<p>\u201c`<\/p>\n<p>\u54c8\u5e0c\u6620\u5c04\u662f\u4e00\u79cd\u9ad8\u6548\u7684\u6570\u636e\u5b58\u50a8\u548c\u67e5\u627e\u65b9\u5f0f\uff0c\u5728\u8ba1\u7b97\u673a\u5e94\u7528\u9886\u57df\u5e7f\u6cdb\u5e94\u7528\uff0cLinux\u54c8\u5e0c\u6620\u5c04\u662f\u4e00\u79cd\u57fa\u4e8e\u94fe\u8868\u89e3\u51b3\u54c8\u5e0c\u51b2\u7a81\u7684\u9ad8\u6548\u54c8\u5e0c\u8868\u5b9e\u73b0\uff0c\u5177\u6709\u7b80\u5355\u3001\u5feb\u901f\u3001\u7075\u6d3b\u7b49\u4f18\u70b9\uff0c\u53ef\u4ee5\u7528\u4e8e\u5404\u79cd\u5927\u89c4\u6a21\u6570\u636e\u5b58\u50a8\u548c\u67e5\u627e\u7684\u573a\u666f\u4e2d\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6211\u4eec\u9700\u8981\u9009\u62e9\u5408\u9002\u7684\u54c8\u5e0c\u51fd\u6570\u6765\u8fbe\u5230\u9ad8\u6548\u7684\u54c8\u5e0c\u6620\u5c04\u6548\u679c\u3002<\/p>\n<p><strong>\u76f8\u5173\u95ee\u9898\u62d3\u5c55\u9605\u8bfb\uff1a<\/strong><\/p>\n<ul>\n<li>java\u4e0eC#\u7684\u533a\u522b\u5728\u54ea\u91cc\uff1f<\/li>\n<li>\u5927\u6570\u636e\u600e\u4e48\u6837\u9700\u8981\u5b66\u4e60\u4ec0\u4e48\u77e5\u8bc6\uff1f<\/li>\n<\/ul>\n<h3>java\u4e0eC#\u7684\u533a\u522b\u5728\u54ea\u91cc\uff1f<\/h3>\n<p>java\u4e0ec#\u7684\u533a\u522b\u5982\u4e0b\uff1a<\/p>\n<p>1.c#\u4e2d\u7684\u547d\u540d\u7a7a\u95f4\u662fnamespace\u7c7b\u4f3c\u4e8eJava\u4e2d\u7684package\uff08\u5305\uff09\uff0c\u5728Java\u4e2d\u5bfc\u5165\u5305\u7528import\u800cc#\u4e2d\u7528using\u3002<\/p>\n<p>2.c#\u548cJava\u90fd\u662f\u4ecemain\u51fd\u6570\u5165\u53e3\u7684\uff0c\u4f46\u662fc#\u4e2d\u7684main\u51fd\u6570\u7684\u9996\u5b57\u6bcd\u5fc5\u987b\u5927\u5199\uff0c\u5b83\u6709\u56db\u79cd\u5199\u6cd5\u5982\u4e0b\uff1a<\/p>\n<p>static void Main(string args){}<\/p>\n<p>static int Main(string args){}<\/p>\n<p>static void Main(){}<\/p>\n<p>static void Main(){}<\/p>\n<p>\u800cJava\u4e2d\u53ea\u6709\u4e00\u79cd\u5f62\u5f0f\uff1astatic void main(String args){}<\/p>\n<p> 3\uff0e\u6570\u636e\u7c7b\u578b\uff1aJava\u8ddfc#\u57fa\u672c\u90fd\u5dee\u4e0d\u591a\uff0c\u4f46\u662fJava\u7684String\u7c7b\u578b\u7684\u9996\u5b57\u6bcd\u5fc5\u987b\u5927\u5199\uff0c\u800cc#\u4e2d\u53ef\u4ee5\u5c0f\u5199\u4e5f\u53ef\u4ee5\u5927\u5199\uff0c\u8fd8\u6709\u5e03\u5c14\u578b\uff0cJava\u4e2d\u662fboolean\uff0cc#\u4e2d\u662fbool\u3002<\/p>\n<p>4\uff0e\u53d8\u91cf\u7684\u547d\u540d\uff1aJava\u4e2d\u53ef\u4ee5\u7528$\u7b26\u53f7\uff0c\u800cc#\u4e2d\u4e0d\u53ef\u4ee5\u4f7f\u7528\u3002<\/p>\n<p>5\uff0e\u6ce8\u91ca\uff1aJava\u6bd4c#\u5c11\u4e00\u79cd\u201c\/\/\/\u201d\u7684\u6587\u6863\u6ce8\u91ca\u3002<\/p>\n<p>6\uff0e\u8f93\u51fa\uff1ac#\u6709\u4e09\u79cd\u65b9\u5f0f\u8f93\u51fa\uff1aCosole.WriteLine(); Cosole.WriteLine(\u8981\u8f93\u51fa\u7684\u503c); Cosole.WriteLine(\u201c\u683c\u5f0f\u5b57\u7b26\u4e32\u201d\uff0c\u53d8\u91cf\u5217\u8868); \u524d\u4e24\u79cd\u7684\u7528\u6cd5\u4e0eJava\u4e2d\u7684System.out.println()\u65b9\u6cd5\u7684\u7528\u6cd5\u76f8\u540c\uff0c\u7b2c\u4e09\u79cd\u65b9\u5f0f\u662f\u6839\u636e\u5360\u4f4d\u7b26\u8f93\u51fa\u7684\uff0c\u6bd4Java\u66f4\u65b9\u4fbf\u4e86\u3002<\/p>\n<p> 7\uff0e\u63a7\u5236\u6d41\u8bed\u53e5\uff1ac#\u8ddfJava\u7c7b\u4f3c,\u8fd8\u6709c#\u4e2d\u7684switch\u5982\u679ccase\u540e\u9762\u6709\u5185\u5bb9\u5fc5\u987b\u8981\u6709break;Java\u53ef\u4ee5\u6ca1\u6709break\uff1b<\/p>\n<p> 8\uff0e\u6570\u7ec4\uff1a\u4e24\u79cd\u8bed\u8a00\u7684\u58f0\u660e\u90fd\u662f\u7528new\u5173\u952e\u5b57\u7684\u3002\u90fd\u53ef\u4ee5\u5728\u521b\u5efa\u6570\u7ec4\u7684\u540c\u65f6\u521d\u59cb\u5316\u5982\uff1aint a={1,2,3,5,5};\u4f46\u662fc#\u6bd4Java\u591a\u4e24\u79cd\u521d\u59cb\u5316\u5982\uff1aint a=new int{1,2,3}; int a=new int{1,2,3};<\/p>\n<\/p>\n<p> 9\uff0e\u65b9\u6cd5\u4e2d\u4f20\u9012\u7684\u53c2\u6570\uff1a\u4e24\u79cd\u8bed\u8a00\u90fd\u4f7f\u7528\u503c\u4f20\u9012\u4e0e\u5f15\u7528\u4f20\u9012\u3002<\/p>\n<p>C#\u7684\u5f15\u7528\u4f20\u9012\u7684\u5173\u952e\u5b57\u662fref\u4e0eout\uff0cref\u4fa7\u91cd\u4e8e\u4fee\u6539\uff0cout\u4fa7\u91cd\u4e8e\u8f93\u51fa\u3002\u800cJava\u4e2d\u90fd\u4ee5\u4f20\u503c\u65b9\u5f0f;<\/p>\n<p> 10\uff0e\u8bbf\u95ee\u4fee\u9970\u7b26\uff1aC#\u4e2d\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\u4e0eJava\u4e2d\u7684\u57fa\u672c\u5bf9\u5e94\uff0c\u4f46\u591a\u51fa\u4e86\u4e00\u4e2ainternal\u3002\u7b80\u800c\u8a00\u4e4b\uff0cC#\u67095\u79cd\u7c7b\u578b\u7684\u53ef\u8bbf\u95ee\u6027\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<p>public\uff1a\u6210\u5458\u53ef\u4ee5\u4ece\u4efb\u4f55\u4ee3\u7801\u8bbf\u95ee\u3002 <\/p>\n<p>protected\uff1a\u6210\u5458\u53ea\u80fd\u4ece\u6d3e\u751f\u7c7b\u8bbf\u95ee\u3002 <\/p>\n<p>internal\uff1a\u6210\u5458\u53ea\u80fd\u4ece\u540c\u4e00\u7a0b\u5e8f\u96c6\u7684\u5185\u90e8\u8bbf\u95ee\u3002 <\/p>\n<p>protected\uff1a\u6210\u5458\u53ea\u80fd\u4ece\u540c\u4e00\u7a0b\u5e8f\u96c6\u5185\u7684\u6d3e\u751f\u7c7b\u8bbf\u95ee\u3002 <\/p>\n<p>private\uff1a\u6210\u5458\u53ea\u80fd\u5728\u5f53\u524d\u7c7b\u7684\u5185\u90e8\u8bbf\u95ee\u3002<\/p>\n<p> 11\uff0e\u7531\u4e8eC#\u4e2d\u4e0d\u5b58\u5728final\u5173\u952e\u8bcd\uff0c\u5982\u679c\u60f3\u8981\u67d0\u4e2a\u7c7b\u4e0d\u518d\u88ab\u6d3e\u751f\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528sealed\u5173\u952e\u8bcd\u5bc6\u5c01\u3002<\/p>\n<p> 12\uff0e\uff1a\u4e24\u79cd\u8bed\u8a00\u90fd\u6709ArrayList\uff0c\u8fd8\u6709\u901a\u8fc7\u952e\u8bbf\u95ee\u503c\u7684Java\u4e2d\u662fHashMap\u800cc#\u4e2d\u662fHashTable\u3002c#\u6bd4Java\u591a\u6cdb\u578bList\u4e0eDictionary\u66f4\u5bb9\u6613\u4e86\uff0c\u65e0\u9700\u62c6\u7bb1\u88c5\u7bb1\u4e86\uff0c\u66f4\u5b89\u5168\u4e86\u3002<\/p>\n<p> 13\uff0e\u7ee7\u627f\uff1aJava\u4e2d\u7528\u5173\u952e\u5b57extends\uff0cc#\u53ea\u7528\u201c\uff1a\u201d\u5c31\u884c\u4e86\u3002\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u674e\u94f6\u65b9\u6cd5Java\u7528super\u5173\u952e\u5b57\uff0c\u800cc#\u7528base\u5173\u952e\u5b57\u3002<\/p>\n<p> 14\uff0e\u591a\u6001\uff1a\u62bd\u8c61\u7c7b\u548c\u62bd\u660c\u9500\u8c61\u65b9\u6cd5\u4e24\u79cd\u8bed\u8a00\u90fd\u7528abstract\u5173\u952e\u5b57\u3002Java\u4e2d\u53e6\u5916\u4e00\u4e2a\u7c7b\u5982\u679c\u7ee7\u627f\u4e86\u5b83\uff0c\u5b9e\u73b0\u76f4\u63a5\u91cd\u5199\u6b64\u65b9\u6cd5\u5c31\u53ef\u4ee5\u4e86\uff1b\u800cc#\u5fc5\u987b\u52a0\u4e0a\u5173\u952e\u5b57override\u5b9e\u73b0\u3002C#\u8fd8\u6bd4Java\u591a\u4e00\u79cd\u865a\u65b9\u6cd5\u6765\u5b9e\u73b0\u591a\u6001\u3002<\/p>\n<p> 15\uff0e\u63a5\u53e3\uff1a\u90fd\u7528\u5173\u952e\u5b57interface\u5b9a\u4e49\uff0cJava\u5b9e\u73b0\u7528\u5173\u952e\u5b57implements\uff1bc#\u7528\u201c\uff1a\u201d\u5b9e\u73b0\u3002\u5728C#\u4e2d\uff0c\u63a5\u53e3\u5185\u7684\u6240\u6709\u65b9\u6cd5\u9ed8\u8ba4\u90fd\u662f\u516c\u7528\u65b9\u6cd5\u3002\u5728Java\u4e2d\uff0c\u65b9\u6cd5\u58f0\u660e\u53ef\u4ee5\u5e26\u6709public\u4fee\u9970\u7b26\uff08\u5373\u4f7f\u8fd9\u5e76\u975e\u5fc5\u8981\uff09\uff0c\u4f46\u5728C#\u4e2d\uff0c\u663e\u5f0f\u4e3a\u63a5\u53e3\u7684\u65b9\u6cd5\u6307\u5b9apublic\u4fee\u9970\u7b26\u662f\u975e\u6cd5\u7684\u3002<\/p>\n<p> 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JAVA 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