{"id":367,"date":"2023-10-26T11:11:42","date_gmt":"2023-10-26T03:11:42","guid":{"rendered":"https:\/\/www.talktop.cn\/?p=367"},"modified":"2025-01-01T14:45:38","modified_gmt":"2025-01-01T06:45:38","slug":"%e4%bd%8d%e8%bf%90%e7%ae%97%e4%bd%bf%e7%94%a8%e6%a1%88%e4%be%8b","status":"publish","type":"post","link":"https:\/\/www.talktop.cn\/?p=367","title":{"rendered":"\u4f4d\u8fd0\u7b97\u4f7f\u7528\u6848\u4f8b"},"content":{"rendered":"\n

Java\u4f4d\u8fd0\u7b97\u662f\u4e00\u79cd\u9ad8\u6548\u7684\u8fd0\u7b97\u65b9\u5f0f\uff0c\u65e0\u8bba\u662f\u5728\u5d4c\u5165\u5f0f\u7f16\u7a0b\u8fd8\u662f\u5728\u5e95\u5c42\u4ee3\u7801\u4e2d\u5e94\u7528\u975e\u5e38\u5e7f\u6cdb\u3002
Java\u4f4d\u8fd0\u7b97\u67097\u4e2a\uff0c\u5206\u522b\u662f~\uff08\u53d6\u53cd\uff09\u3001&\uff08\u4e0e\uff09\u3001|\uff08\u6216\uff09\u3001^\uff08\u5f02\u6216\uff09\u3001>>\uff08\u53f3\u79fb\uff09\u3001<<\uff08\u5de6\u79fb\uff09\u3001>>>\uff08\u65e0\u7b26\u53f7\u53f3\u79fb\uff09<\/p>\n\n\n\n

~\uff08\u53d6\u53cd\uff09
\u53d6\u53cd\u8fd0\u7b97\u4f4d\u8fd0\u7b97<\/p>\n\n\n\n

int sum = Integer.MAX_VALUE;\nSystem.out.println(Integer.toBinaryString(sum));\nSystem.out.println(Integer.toBinaryString(~sum));\nSystem.out.println(\"sum \u975e\u7684\u7ed3\u679c\u662f\"+~sum);\n<\/code><\/pre>\n\n\n\n
01111111 11111111 11111111 11111111
10000000 00000000 00000000 00000000
sum \u975e\u7684\u7ed3\u679c\u662f-2147483648
int\u6700\u5927\u503c\u4f4d2\u768431\u6b21\u65b9\uff0c\u7b2c\u4e00\u4f4d\u4e3a\u7b26\u53f7\u5360\u4f4d\uff0c\u53d6\u53cd\u7ed3\u679c\u4e3a-2\u768431\u6b21\u65b9
int4\u5b57\u8282\uff0c\u6bcf\u4e2a\u5b57\u8282\u5bf9\u5e948bit<\/p>\n\n\n\n
&\uff08\u4e0e\uff09\u8fd0\u7b97
\u4e0e\u8fd0\u7b97\u9488\u5bf9\u4e8c\u8fdb\u5236\u4e24\u4e2a\u4e3a1\u624d\u4e3a1<\/p>\n\n\n\n
|\uff08\u6216\uff09\u8fd0\u7b97
\u6216\u8fd0\u7b97\u9488\u5bf9\u4e8c\u8fdb\u5236\u53ea\u8981\u6709\u4e2a\u4e00\u4e2a\u4e3a1\u5219\u4e3a1<\/p>\n\n\n\n
^\uff08\u5f02\u6216\uff09
\u5f02\u6216\u8fd0\u7b97\u9488\u5bf9\u4e8c\u8fdb\u5236\u4e24\u4e2a\u4f4d\u76f8\u540c\u5219\u4e3a0\uff0c\u4e0d\u76f8\u540c\u5219\u4e3a1<\/p>\n\n\n\n
<<\u4f4d\u79fb\u8fd0\u7b97
<<\u5de6\u79fb\u8fd0\u7b97\uff0c\u9488\u5bf9\u4e8c\u8fdb\u5236\u5411\u5de6\u79fb\u4f4d\uff0c\u540e\u9762\u75280\u8865\u9f50\uff0c\u76f8\u5f53\u4e8e\u5341\u8fdb\u5236\u5de6\u8fb9\u6570\u636e\u4e582\u7684\u79fb\u52a8\u6b21\u5e42
2<<3 \u7b49\u4ef7\u4e8e2\u7684\u56db\u6b21\u65b9<\/p>\n\n\n\n
\u4f4d\u79fb\u8fd0\u7b97>>
\u53f3\u79fb>>\uff0c\u9488\u5bf9\u4e8c\u8fdb\u5236\u5411\u53f3\u79fb\u4f4d\uff0c\u540e\u9762\u75280\u8865\u9f50\uff0c\u76f8\u5f53\u4e8e\u5341\u8fdb\u5236\u5de6\u8fb9\u6570\u636e\u96642\u7684\u79fb\u52a8\u6b21\u5e42<\/p>\n\n\n\n
\u65e0\u7b26\u53f7\u4f4d\u79fb\u8fd0\u7b97>>>
\u5982\u679c\u662f\u8d1f\u6570\u65f6>>>\u548c>>\u5dee\u522b\u662f\u524d\u8005\u4f4d\u79fb\u8fd0\u7b97\u662f\u4e8c\u8fdb\u5236\u7684\u8865\u7801\u6765\u64cd\u4f5c<\/p>\n\n\n\n
\u4f4d\u8fd0\u7b97\u52a0\u5bc6\u5e94\u7528
\u5bf9\u79f0\u52a0\u5bc6<\/p>\n\n\n\n
public static String encode(String source,int key) throws Exception{\n        byte[] b = source.getBytes(\"utf-8\");\n        for(int i=0;i<b.length;i++){\n            b[i] = (byte) (b[i]^key);\n        }\n        return  new String(b);\n}<\/code><\/pre>\n\n\n\n
\u5947\u5076\u5224\u65ad<\/p>\n\n\n\n
\/\/\u5224\u65ad\u6570\u503c\u7684\u5947\u5076\u6027\nboolean isOddNumber(int n){\n    return (n & 1) == 1;\n}<\/code><\/pre>\n\n\n\n
\u4ea4\u6362\u503c<\/p>\n\n\n\n
\/\/\u57fa\u4e8e\u4f4d\u8fd0\u7b97\u7684\u65b9\u5f0f\na = a ^ b;\nb = a ^ b; \/\/\u5b9e\u9645\u4e0a\u662f(a^b)^b\uff0c\u4e5f\u5c31\u662fa\u5f02\u6216\u4e86b\u4e24\u6b21\uff0c\u7b49\u53f7\u53f3\u8fb9\u662fa\u7684\u503c\u3002\na = a ^ b;<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
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