{"id":219,"date":"2026-07-14T21:50:00","date_gmt":"2026-07-14T13:50:00","guid":{"rendered":"http:\/\/ssjava.xyz\/index.php\/2026\/07\/14\/05-%e6%a1%88%e4%be%8b%e4%b8%8e%e5%ae%9e%e6%88%98%ef%bc%88%e8%bf%90%e7%ae%97%e7%ac%a6%c2%b7%e5%88%86%e6%94%af%c2%b7%e5%be%aa%e7%8e%af%e7%bb%bc%e5%90%88%ef%bc%89\/"},"modified":"2026-07-15T09:24:06","modified_gmt":"2026-07-15T01:24:06","slug":"05-%e6%a1%88%e4%be%8b%e4%b8%8e%e5%ae%9e%e6%88%98%ef%bc%88%e8%bf%90%e7%ae%97%e7%ac%a6%c2%b7%e5%88%86%e6%94%af%c2%b7%e5%be%aa%e7%8e%af%e7%bb%bc%e5%90%88%ef%bc%89","status":"publish","type":"post","link":"https:\/\/ssjava.xyz\/index.php\/2026\/07\/14\/05-%e6%a1%88%e4%be%8b%e4%b8%8e%e5%ae%9e%e6%88%98%ef%bc%88%e8%bf%90%e7%ae%97%e7%ac%a6%c2%b7%e5%88%86%e6%94%af%c2%b7%e5%be%aa%e7%8e%af%e7%bb%bc%e5%90%88%ef%bc%89\/","title":{"rendered":"05. \u6848\u4f8b\u4e0e\u5b9e\u6218\uff08\u8fd0\u7b97\u7b26\u00b7\u5206\u652f\u00b7\u5faa\u73af\u7efc\u5408\uff09"},"content":{"rendered":"\n

\u6848\u4f8b\u4e00\uff1a\u731c\u6570\u5b57\u6e38\u620f\uff08\u7efc\u5408\u8fd0\u7528\uff09<\/h2>\n\n\n\n

\u5148\u6765\u4e00\u4e2a\u7ecf\u5178\u7684\u7ec3\u624b\u9879\u76ee\u2014\u2014\u731c\u6570\u5b57\u3002\u8ba9\u4f60\u731c 1~100 \u4e4b\u95f4\u7684\u968f\u673a\u6570\uff0c\u6bcf\u6b21\u544a\u8bc9\u4f60\u662f\u5927\u4e86\u8fd8\u662f\u5c0f\u4e86\uff0c\u731c\u4e2d\u4e3a\u6b62\u5e76\u7edf\u8ba1\u6b21\u6570\uff1a<\/p>\n\n\n\n

import java.util.Random;\nimport java.util.Scanner;\n\npublic class GuessNumber {\n    public static void main(String[] args) {\n        \/\/ 1. \u751f\u6210 1~100 \u7684\u968f\u673a\u6570\n        Random random = new Random();\n        int target = random.nextInt(100) + 1;  \/\/ nextInt(100) \u8fd4\u56de 0~99\uff0c+1 \u53d8\u6210 1~100\n        \n        \/\/ 2. \u51c6\u5907\u952e\u76d8\u8f93\u5165\u548c\u8ba1\u6570\n        Scanner sc = new Scanner(System.in);\n        int guess;\n        int count = 0;\n        \n        System.out.println(\"====== \u731c\u6570\u5b57 ======\");\n        System.out.println(\"\u6211\u5fc3\u91cc\u60f3\u4e86\u4e00\u4e2a 1~100 \u4e4b\u95f4\u7684\u6570\uff0c\u4f60\u6765\u731c\u731c\u770b\");\n        \n        \/\/ 3. \u5faa\u73af\u731c\uff0c\u76f4\u5230\u731c\u5bf9\n        do {\n            System.out.print(\"\u8bf7\u8f93\u5165\u4f60\u7684\u731c\u6d4b\uff1a\");\n            guess = sc.nextInt();\n            count++;\n            \n            if (guess < target) {\n                System.out.println(\"\u5c0f\u4e86\uff0c\u518d\u5927\u70b9\uff01\");\n            } else if (guess > target) {\n                System.out.println(\"\u5927\u4e86\uff0c\u518d\u5c0f\u70b9\uff01\");\n            } else {\n                System.out.println(\"\u606d\u559c\u4f60\uff0c\u731c\u5bf9\u4e86\uff01\");\n                System.out.println(\"\u4f60\u4e00\u5171\u731c\u4e86 \" + count + \" \u6b21\");\n            }\n        } while (guess != target);\n        \n        sc.close();\n    }\n}<\/code><\/pre>\n\n\n\n
\u8fd9\u4e2a\u4f8b\u5b50\u8986\u76d6\u4e86\u54ea\u4e9b\u77e5\u8bc6\u70b9\uff1f<\/strong><\/p>\n\n\n\n
\u522b\u770b\u8fd9\u4e2a\u7a0b\u5e8f\u7b80\u5355\uff0c\u731c\u6570\u5b57\u7684\u9aa8\u67b6\u53ef\u4ee5\u6269\u5c55\u5230\u731c\u5355\u8bcd\u3001\u731c\u5546\u54c1\u4ef7\u683c\u3001\u62bd\u5956\u7cfb\u7edf\u2026\u2026\u628a target<\/code> \u6362\u6210\u5355\u8bcd\u6570\u7ec4\u6216\u4ef7\u683c\u533a\u95f4\u5c31\u884c\u3002\u8fd9\u5c31\u662f”\u6848\u4f8b\u9a71\u52a8”\u7684\u9b45\u529b\u2014\u2014\u7ec3\u4e00\u4e2a\u9876\u5341\u4e2a\u3002<\/p>\n\n\n\n
\u6848\u4f8b\u4e8c\uff1a\u7b80\u6613\u8ba1\u7b97\u5668\uff08\u8fd0\u7b97\u7b26\u7efc\u5408\uff09<\/h2>\n\n\n\n
\u7528 switch \u505a\u4e00\u4e2a\u652f\u6301\u52a0\u51cf\u4e58\u9664\u7684\u7b80\u6613\u8ba1\u7b97\u5668\uff1a<\/p>\n\n\n\n
import java.util.Scanner;\n\npublic class SimpleCalculator {\n    public static void main(String[] args) {\n        Scanner sc = new Scanner(System.in);\n        \n        System.out.print(\"\u8bf7\u8f93\u5165\u7b2c\u4e00\u4e2a\u6570\u5b57\uff1a\");\n        double num1 = sc.nextDouble();\n        \n        System.out.print(\"\u8bf7\u8f93\u5165\u8fd0\u7b97\u7b26\uff08+ - * \/\uff09\uff1a\");\n        String operator = sc.next();\n        \n        System.out.print(\"\u8bf7\u8f93\u5165\u7b2c\u4e8c\u4e2a\u6570\u5b57\uff1a\");\n        double num2 = sc.nextDouble();\n        \n        double result;\n        boolean valid = true;\n        \n        switch (operator) {\n            case \"+\":\n                result = num1 + num2;\n                break;\n            case \"-\":\n                result = num1 - num2;\n                break;\n            case \"*\":\n                result = num1 * num2;\n                break;\n            case \"\/\":\n                if (num2 == 0) {\n                    System.out.println(\"\u9664\u6570\u4e0d\u80fd\u4e3a 0\uff01\");\n                    valid = false;\n                    result = 0;\n                } else {\n                    result = num1 \/ num2;\n                }\n                break;\n            default:\n                System.out.println(\"\u4e0d\u652f\u6301\u7684\u8fd0\u7b97\u7b26\uff1a\" + operator);\n                valid = false;\n                result = 0;\n        }\n        \n        if (valid) {\n            System.out.println(num1 + \" \" + operator + \" \" + num2 + \" = \" + result);\n        }\n        \n        sc.close();\n    }\n}<\/code><\/pre>\n\n\n\n
\u8fd9\u4e2a\u4f8b\u5b50\u7684\u77e5\u8bc6\u70b9<\/strong>\uff1a<\/p>\n\n\n\n
\u52a0\u4e2a\u5c0f\u6539\u9020<\/strong>\uff1a\u628a\u5faa\u73af\u5957\u5728\u5916\u9762\uff0c\u8ba9\u7528\u6237\u80fd\u4e00\u76f4\u8ba1\u7b97\uff0c\u76f4\u5230\u8f93\u5165 q \u9000\u51fa\u3002\u8bd5\u8bd5\u81ea\u5df1\u52a8\u624b\u6539\u4e00\u6539\u3002<\/p>\n\n\n\n
\u6848\u4f8b\u4e09\uff1a\u6253\u5370\u4e5d\u4e5d\u4e58\u6cd5\u8868\uff08\u5faa\u73af\u5d4c\u5957\uff09<\/h2>\n\n\n\n
\u8fd9\u662f\u51e0\u4e4e\u6240\u6709\u7f16\u7a0b\u8bed\u8a00\u5165\u95e8\u7684”\u57fa\u672c\u529f”\u2014\u2014\u7528\u4e24\u5c42 for \u5faa\u73af\u6253\u5370\u4e58\u6cd5\u8868\uff1a<\/p>\n\n\n\n
public class MultiplicationTable {\n    public static void main(String[] args) {\n        for (int i = 1; i <= 9; i++) {          \/\/ \u5916\u5c42\u5faa\u73af\uff1a\u884c\n            for (int j = 1; j <= i; j++) {      \/\/ \u5185\u5c42\u5faa\u73af\uff1a\u5217\n                System.out.print(j + \"\u00d7\" + i + \"=\" + (i * j) + \"t\");\n            }\n            System.out.println();  \/\/ \u6362\u884c\n        }\n    }\n}<\/code><\/pre>\n\n\n\n
\u8f93\u51fa\u6548\u679c\uff1a<\/p>\n\n\n\n
1\u00d71=1\t\n1\u00d72=2\t2\u00d72=4\t\n1\u00d73=3\t2\u00d73=6\t3\u00d73=9\t\n1\u00d74=4\t2\u00d74=8\t3\u00d74=12\t4\u00d74=16\t\n1\u00d75=5\t2\u00d75=10\t3\u00d75=15\t4\u00d75=20\t5\u00d75=25\t\n1\u00d76=6\t2\u00d76=12\t3\u00d76=18\t4\u00d76=24\t5\u00d76=30\t6\u00d76=36\t\n1\u00d77=7\t2\u00d77=14\t3\u00d77=21\t4\u00d77=28\t5\u00d77=35\t6\u00d77=42\t7\u00d77=49\t\n1\u00d78=8\t2\u00d78=16\t3\u00d78=24\t4\u00d78=32\t5\u00d78=40\t6\u00d78=48\t7\u00d78=56\t8\u00d78=64\t\n1\u00d79=9\t2\u00d79=18\t3\u00d79=27\t4\u00d79=36\t5\u00d79=45\t6\u00d79=54\t7\u00d79=63\t8\u00d79=72\t9\u00d79=81<\/code><\/pre>\n\n\n\n
\u5173\u952e\u7406\u89e3<\/strong>\uff1a<\/p>\n\n\n\n
\u81ea\u5df1\u8bd5\u8bd5<\/strong>\uff1a\u5982\u679c\u628a\u5185\u5c42\u6761\u4ef6\u6539\u6210 j <= 9<\/code> \u4f1a\u600e\u6837\uff1f\u6539\u6210 j <= 9 - i + 1<\/code> \u5462\uff1f<\/p>\n\n\n\n
\u6848\u4f8b\u56db\uff1a\u5224\u65ad\u8d28\u6570\uff08\u5206\u652f + \u5faa\u73af\u914d\u5408\uff09<\/h2>\n\n\n\n
\u5224\u65ad\u4e00\u4e2a\u6570\u662f\u4e0d\u662f\u8d28\u6570\uff08\u53ea\u80fd\u88ab 1 \u548c\u81ea\u8eab\u6574\u9664\uff09\uff1a<\/p>\n\n\n\n
import java.util.Scanner;\n\npublic class PrimeChecker {\n    public static void main(String[] args) {\n        Scanner sc = new Scanner(System.in);\n        \n        System.out.print(\"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6b63\u6574\u6570\uff1a\");\n        int num = sc.nextInt();\n        \n        if (num <= 1) {\n            System.out.println(num + \" \u4e0d\u662f\u8d28\u6570\");\n        } else {\n            boolean isPrime = true;\n            \n            \/\/ \u4ece 2 \u68c0\u67e5\u5230 num \u7684\u5e73\u65b9\u6839\u5c31\u884c\uff08\u4f18\u5316\u70b9\uff09\n            for (int i = 2; i * i <= num; i++) {\n                if (num % i == 0) {\n                    isPrime = false;\n                    break;  \/\/ \u627e\u5230\u56e0\u6570\u5c31\u9000\u51fa\u5faa\u73af\n                }\n            }\n            \n            if (isPrime) {\n                System.out.println(num + \" \u662f\u8d28\u6570\");\n            } else {\n                System.out.println(num + \" \u4e0d\u662f\u8d28\u6570\");\n            }\n        }\n        \n        sc.close();\n    }\n}<\/code><\/pre>\n\n\n\n
\u503c\u5f97\u6ce8\u610f\u7684\u4f18\u5316<\/strong>\uff1a<\/p>\n\n\n\n
\u7528\u4e0a\u4e00\u7bc7\u5b66\u7684 break + \u53d6\u6a21\u8fd0\u7b97\u7b26 %<\/strong> \u5b9e\u73b0\u4e86\u4e00\u4e2a\u5f88\u5b9e\u7528\u7684\u5224\u65ad\u5de5\u5177\u3002\u5b66\u8bed\u6cd5\u7684\u65f6\u5019\u89c9\u5f97”\u5c31\u8fd9\uff1f”\uff0c\u771f\u7528\u8d77\u6765\u624d\u77e5\u9053\u90fd\u662f\u5b9d\u8d1d\u3002<\/p>\n\n\n\n
\u6848\u4f8b\u4e94\uff1a\u6253\u5370\u83f1\u5f62\u56fe\u6848\uff08\u591a\u91cd\u5faa\u73af\u827a\u672f\uff09<\/h2>\n\n\n\n
\u8fd9\u4e2a\u6848\u4f8b\u770b\u8d77\u6765\u82b1\u54e8\uff0c\u4f46\u5b9e\u9645\u5c31\u662f\u5728\u300c\u7a7a\u683c\u548c\u661f\u53f7\u300d\u4e4b\u95f4\u505a\u597d\u6570\u91cf\u63a7\u5236\uff1a<\/p>\n\n\n\n
import java.util.Scanner;\n\npublic class DiamondPattern {\n    public static void main(String[] args) {\n        Scanner sc = new Scanner(System.in);\n        \n        System.out.print(\"\u8bf7\u8f93\u5165\u83f1\u5f62\u7684\u884c\u6570\uff08\u5947\u6570\uff09\uff1a\");\n        int rows = sc.nextInt();\n        \n        \/\/ \u4e0a\u534a\u90e8\u5206\uff08\u542b\u4e2d\u95f4\u884c\uff09\n        int half = rows \/ 2 + 1;\n        for (int i = 1; i <= half; i++) {\n            \/\/ \u6253\u5370\u524d\u9762\u7684\u7a7a\u683c\n            for (int j = 1; j <= half - i; j++) {\n                System.out.print(\"  \");\n            }\n            \/\/ \u6253\u5370\u661f\u53f7\n            for (int k = 1; k <= 2 * i - 1; k++) {\n                System.out.print(\"* \");\n            }\n            System.out.println();\n        }\n        \n        \/\/ \u4e0b\u534a\u90e8\u5206\n        for (int i = half - 1; i >= 1; i--) {\n            \/\/ \u6253\u5370\u524d\u9762\u7684\u7a7a\u683c\n            for (int j = 1; j <= half - i; j++) {\n                System.out.print(\"  \");\n            }\n            \/\/ \u6253\u5370\u661f\u53f7\n            for (int k = 1; k <= 2 * i - 1; k++) {\n                System.out.print(\"* \");\n            }\n            System.out.println();\n        }\n        \n        sc.close();\n    }\n}<\/code><\/pre>\n\n\n\n
\u8f93\u5165 7 \u7684\u8f93\u51fa\u6548\u679c\uff1a<\/p>\n\n\n\n
      * \n    * * * \n  * * * * * \n* * * * * * * \n  * * * * * \n    * * * \n      * <\/code><\/pre>\n\n\n\n
\u6838\u5fc3\u903b\u8f91<\/strong>\uff1a\u4e0a\u534a\u90e8\u5206\u6bcf\u884c\u6709 2*i-1<\/code> \u4e2a\u661f\u53f7\uff08i \u4ece 1 \u5f00\u59cb\uff09\uff0c\u7a7a\u683c\u6570 = half – i\u3002\u4e0b\u534a\u90e8\u5206\u53cd\u8fc7\u6765\u3002\u638c\u63e1\u4e86\u8fd9\u4e2a\u89c4\u5f8b\uff0c\u6253\u5370\u4efb\u4f55\u5bf9\u79f0\u56fe\u5f62\u90fd\u4e0d\u5728\u8bdd\u4e0b\u3002<\/p>\n\n\n\n
\u5c0f\u7ed3\u4e0e\u53cd\u601d<\/h2>\n\n\n\n
\u8fd9 5 \u4e2a\u6848\u4f8b\uff0c\u7528\u5230\u7684\u77e5\u8bc6\u70b9\u5168\u90e8\u6765\u81ea\u524d\u56db\u7bc7\uff1a<\/p>\n\n\n\n
\u6848\u4f8b<\/th>\u7528\u5230\u7684\u77e5\u8bc6\u70b9<\/th><\/tr><\/thead>
\u731c\u6570\u5b57<\/td>Random\u3001Scanner\u3001if-else\u3001do-while\u3001\u6bd4\u8f83\u8fd0\u7b97\u7b26<\/td><\/tr>
\u7b80\u6613\u8ba1\u7b97\u5668<\/td>switch\u3001\u7b97\u672f\u8fd0\u7b97\u7b26\u3001nextDouble\u3001\u5e03\u5c14\u72b6\u6001\u6807\u8bb0<\/td><\/tr>
\u4e58\u6cd5\u8868<\/td>for \u5d4c\u5957\u3001t \u5236\u8868\u7b26\u3001\u5faa\u73af\u8fb9\u754c\u63a7\u5236<\/td><\/tr>
\u5224\u65ad\u8d28\u6570<\/td>break\u3001\u53d6\u6a21 %\u3001\u5e73\u65b9\u6839\u4f18\u5316\u3001for + if \u914d\u5408<\/td><\/tr>
\u83f1\u5f62\u56fe\u6848<\/td>\u591a\u91cd for \u5faa\u73af\u3001\u7a7a\u683c\u4e0e\u661f\u53f7\u8ba1\u6570<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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