{"id":69439,"date":"2026-01-31T17:41:02","date_gmt":"2026-01-31T09:41:02","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/69439.html"},"modified":"2026-01-31T17:41:02","modified_gmt":"2026-01-31T09:41:02","slug":"javase-%e8%af%ad%e8%a8%80%e5%9f%ba%e7%a1%80","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/69439.html","title":{"rendered":"JavaSE-\u8bed\u8a00\u57fa\u7840"},"content":{"rendered":"

JavaSE – \u8bed\u8a00\u57fa\u7840 （2026 \u5e74\u89c6\u89d2 \u00b7 \u96f6\u57fa\u7840\u5230\u80fd\u5199\u5c0f\u9879\u76ee \u00b7 \u6838\u5fc3\u77e5\u8bc6\u70b9\u5168\u68b3\u7406 + \u4ee3\u7801\u793a\u4f8b + \u5e38\u89c1\u6613\u9519\u70b9）<\/p>\n

JavaSE（Standard Edition）\u662f Java \u7684\u6807\u51c6\u7248，\u4e5f\u662f\u6240\u6709 Java \u5f00\u53d1\u8005\u7684\u8d77\u70b9\u3002 \u8bed\u8a00\u57fa\u7840\u90e8\u5206\u4e3b\u8981\u6307：\u80fd\u72ec\u7acb\u5199\u51fa\u6b63\u786e\u3001\u53ef\u8bfb\u7684 Java \u7a0b\u5e8f \u7684\u90a3\u4e00\u5957\u8bed\u6cd5\u89c4\u5219\u548c\u6838\u5fc3\u673a\u5236\u3002<\/p>\n

\u4e0b\u9762\u6309\u5b9e\u9645\u5b66\u4e60\u987a\u5e8f + \u9762\u8bd5\/\u9879\u76ee\u9ad8\u9891\u5ea6\u6574\u7406，\u5efa\u8bae\u6309\u8fd9\u4e2a\u987a\u5e8f\u638c\u63e1\u3002<\/p>\n

\u4e00\u3001Java \u5165\u95e8 & \u5f00\u53d1\u73af\u5883（\u5148\u8dd1\u901a Hello World）<\/h4>\n
  • JDK \/ JRE \/ JVM \u533a\u522b（\u9762\u8bd5\u5fc5\u95ee）<\/li>\n\n\u540d\u8bcd\u5168\u79f0\u4f5c\u7528\u5305\u542b\u4ec0\u4e48\u8bb0\u4f4f\u4e00\u53e5\u8bdd<\/tr>\n\n\n\n\n
    JDK<\/td>\nJava Development Kit<\/td>\n\u5f00\u53d1\u5de5\u5177\u5305（\u5199\u4ee3\u7801 + \u8fd0\u884c）<\/td>\nJRE + \u7f16\u8bd1\u5668 javac + \u5de5\u5177<\/td>\n\u5f00\u53d1\u8005\u4e0b\u8f7d\u8fd9\u4e2a<\/td>\n<\/tr>\n
    JRE<\/td>\nJava Runtime Environment<\/td>\n\u8fd0\u884c\u73af\u5883（\u53ea\u8dd1\u7a0b\u5e8f）<\/td>\nJVM + \u6838\u5fc3\u7c7b\u5e93 rt.jar<\/td>\n\u7ed9\u6700\u7ec8\u7528\u6237\u8dd1 jar \u7684\u73af\u5883<\/td>\n<\/tr>\n
    JVM<\/td>\nJava Virtual Machine<\/td>\nJava \u865a\u62df\u673a（\u771f\u6b63\u6267\u884c\u5b57\u8282\u7801）<\/td>\n\u7c7b\u52a0\u8f7d\u5668 + \u5b57\u8282\u7801\u6267\u884c\u5f15\u64ce\u7b49<\/td>\n.java \u2192 .class \u2192 JVM \u89e3\u91ca\u6267\u884c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    2026 \u5e74\u4e3b\u6d41：JDK 17 \/ 21（LTS） \u6216 JDK 23\/24（\u6700\u65b0\u7279\u6027\u9884\u89c8）<\/p>\n

  • \u7b2c\u4e00\u4e2a\u7a0b\u5e8f（\u5fc5\u987b\u81ea\u5df1\u6572）<\/li>\n

    public<\/span> class<\/span> HelloWorld<\/span> {<\/span>
    \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"Hello, JavaSE 2026!"<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \u7f16\u8bd1\u8fd0\u884c\u547d\u4ee4（\u547d\u4ee4\u884c\u7ec3\u4e60\u7528）：<\/p>\n

    javac HelloWorld.java
    \njava HelloWorld<\/p>\n

    \u4e8c\u3001Java \u57fa\u672c\u8bed\u6cd5\u89c4\u5219（\u5199\u4ee3\u7801\u7684\u201c\u4ea4\u901a\u89c4\u5219\u201d）<\/h4>\n\n\u89c4\u5219\u8bf4\u660e\u793a\u4f8b \/ \u6ce8\u610f\u4e8b\u9879<\/tr>\n\n\n\n\n\n\n\n\n
    \u5927\u5c0f\u5199\u654f\u611f<\/td>\nclass \u2260 Class<\/td>\n\u5173\u952e\u5b57\u3001\u6807\u8bc6\u7b26\u3001\u7c7b\u540d\u90fd\u533a\u5206\u5927\u5c0f\u5199<\/td>\n<\/tr>\n
    \u6bcf\u6761\u8bed\u53e5\u4ee5 ; \u7ed3\u5c3e<\/td>\n\u5fc5\u987b！<\/td>\nSystem.out.println(\u201chi\u201d);<\/td>\n<\/tr>\n
    {} \u4ee3\u7801\u5757<\/td>\n\u7c7b\u3001\u65b9\u6cd5\u3001if\u3001\u5faa\u73af\u90fd\u8981\u7528 {} \u5305\u4f4f<\/td>\n\u5f3a\u70c8\u5efa\u8bae\u5199，\u5373\u4f7f\u53ea\u6709\u4e00\u884c<\/td>\n<\/tr>\n
    \u5355\u884c\u6ce8\u91ca<\/td>\n\/\/<\/td>\n\/\/ \u8fd9\u662f\u4e00\u884c\u6ce8\u91ca<\/td>\n<\/tr>\n
    \u591a\u884c\u6ce8\u91ca<\/td>\n\/* \u2026 *\/<\/td>\n\/* \u591a\u884c *\/<\/td>\n<\/tr>\n
    \u6587\u6863\u6ce8\u91ca<\/td>\n\/** \u2026 *\/<\/td>\n\u7528\u4e8e javadoc \u751f\u6210 API \u6587\u6863<\/td>\n<\/tr>\n
    \u6e90\u6587\u4ef6\u7f16\u7801<\/td>\n\u63a8\u8350 UTF-8<\/td>\nIDEA \u9ed8\u8ba4 UTF-8，\u907f\u514d\u4e2d\u6587\u4e71\u7801<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u4e09\u3001\u6807\u8bc6\u7b26 & \u547d\u540d\u89c4\u8303（\u5199\u4ee3\u7801\u50cf\u5199\u4e2d\u6587\u4f5c\u6587）<\/h4>\n\n\u7c7b\u578b\u89c4\u5219\u63a8\u8350\u547d\u540d\u98ce\u683c（2026 \u4e3b\u6d41）\u793a\u4f8b<\/tr>\n\n\n\n\n\n\n\n\n
    \u6807\u8bc6\u7b26<\/td>\n\u5b57\u6bcd\u3001\u6570\u5b57\u3001\u4e0b\u5212\u7ebf\u3001$ \u5f00\u5934；\u4e0d\u80fd\u6570\u5b57\u5f00\u5934；\u4e0d\u80fd\u662f\u5173\u952e\u5b57<\/td>\n\u2014<\/td>\nage, _count, $price<\/td>\n<\/tr>\n
    \u7c7b\u540d<\/td>\n\u5927\u9a7c\u5cf0<\/td>\n\u9996\u5b57\u6bcd\u5927\u5199 + \u9a7c\u5cf0<\/td>\nUserService, OrderEntity<\/td>\n<\/tr>\n
    \u63a5\u53e3\u540d<\/td>\n\u5927\u9a7c\u5cf0<\/td>\n\u901a\u5e38\u4ee5 I \u6216 Able \u7ed3\u5c3e（\u53ef\u9009）<\/td>\nRunnable, Comparable<\/td>\n<\/tr>\n
    \u65b9\u6cd5\u540d<\/td>\n\u5c0f\u9a7c\u5cf0<\/td>\n\u52a8\u8bcd\u6216\u52a8\u8bcd+\u540d\u8bcd<\/td>\ngetName, calculateTotal<\/td>\n<\/tr>\n
    \u53d8\u91cf\u540d<\/td>\n\u5c0f\u9a7c\u5cf0<\/td>\n\u540d\u8bcd\u6216\u5f62\u5bb9\u8bcd+\u540d\u8bcd<\/td>\nuserAge, totalPrice<\/td>\n<\/tr>\n
    \u5e38\u91cf\u540d<\/td>\n\u5168\u5927\u5199 + \u4e0b\u5212\u7ebf<\/td>\n\u2014<\/td>\nMAX_VALUE, PI<\/td>\n<\/tr>\n
    \u5305\u540d<\/td>\n\u5168\u5c0f\u5199，\u591a\u7ea7\u7528 . \u5206\u9694<\/td>\n\u516c\u53f8\u57df\u540d\u5355\u8bcd\u5012\u5199<\/td>\ncom.company.project<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u56db\u3001\u6570\u636e\u7c7b\u578b（8 \u5927\u57fa\u672c\u7c7b\u578b + \u5f15\u7528\u7c7b\u578b）<\/h4>\n

    8 \u79cd\u57fa\u672c\u6570\u636e\u7c7b\u578b（\u503c\u7c7b\u578b，\u6808\u4e0a\u5206\u914d）<\/p>\n\n\u7c7b\u578b\u5b57\u8282\u9ed8\u8ba4\u503c\u53d6\u503c\u8303\u56f4\u5305\u88c5\u7c7b\u5e38\u89c1\u573a\u666f<\/tr>\n\n\n\n\n\n\n\n\n\n
    byte<\/td>\n1<\/td>\n0<\/td>\n-128 ~ 127<\/td>\nByte<\/td>\n\u6587\u4ef6\u6d41\u3001\u5c0f\u6574\u6570<\/td>\n<\/tr>\n
    short<\/td>\n2<\/td>\n0<\/td>\n-32768 ~ 32767<\/td>\nShort<\/td>\n\u5f88\u5c11\u7528<\/td>\n<\/tr>\n
    int<\/td>\n4<\/td>\n0<\/td>\n-2^31 ~ 2^31-1 \u2248 -21\u4ebf ~ 21\u4ebf<\/td>\nInteger<\/td>\n\u6700\u5e38\u7528\u6574\u6570<\/td>\n<\/tr>\n
    long<\/td>\n8<\/td>\n0L<\/td>\n-2^63 ~ 2^63-1<\/td>\nLong<\/td>\nID\u3001\u5927\u91d1\u989d\u3001\u65f6\u95f4\u6233<\/td>\n<\/tr>\n
    float<\/td>\n4<\/td>\n0.0f<\/td>\n\u2248 \u00b13.4E38<\/td>\nFloat<\/td>\n\u5f88\u5c11\u7528（\u7cbe\u5ea6\u95ee\u9898）<\/td>\n<\/tr>\n
    double<\/td>\n8<\/td>\n0.0<\/td>\n\u2248 \u00b11.8E308<\/td>\nDouble<\/td>\n\u79d1\u5b66\u8ba1\u7b97\u3001\u5c0f\u6570\u6700\u5e38\u7528<\/td>\n<\/tr>\n
    char<\/td>\n2<\/td>\n\u2018\u2019<\/td>\n0 ~ 65535（Unicode）<\/td>\nCharacter<\/td>\n\u5355\u4e2a\u5b57\u7b26<\/td>\n<\/tr>\n
    boolean<\/td>\n~1bit<\/td>\nfalse<\/td>\ntrue \/ false<\/td>\nBoolean<\/td>\n\u6761\u4ef6\u5224\u65ad<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u5f15\u7528\u7c7b\u578b（\u5730\u5740\u7c7b\u578b，\u5806\u4e0a\u5206\u914d）<\/p>\n

      \n
    • \u7c7b\u3001\u63a5\u53e3\u3001\u6570\u7ec4\u3001\u679a\u4e3e\u3001\u6ce8\u89e3<\/li>\n
    • \u9ed8\u8ba4\u503c：null<\/li>\n<\/ul>\n

      \u5b57\u9762\u91cf\u5199\u6cd5\u793a\u4f8b（2026 \u5e38\u89c1\u5199\u6cd5）<\/p>\n

      int<\/span> a =<\/span> 100<\/span>;<\/span>
      \nlong<\/span> b =<\/span> 100_000_000_000L<\/span>;<\/span> \/\/ \u4e0b\u5212\u7ebf\u5206\u9694，\u53ef\u8bfb\u6027\u597d（Java 7+）<\/span>
      \ndouble<\/span> c =<\/span> 3.14<\/span>;<\/span>
      \nfloat<\/span> d =<\/span> 3.14f<\/span>;<\/span>
      \nchar<\/span> e =<\/span> '\u4e2d'<\/span>;<\/span> \/\/ \u5355\u5f15\u53f7<\/span>
      \nString<\/span> s =<\/span> "Hello 2026"<\/span>;<\/span> \/\/ \u53cc\u5f15\u53f7（\u5f15\u7528\u7c7b\u578b）<\/span>
      \nboolean<\/span> flag =<\/span> true<\/span>;<\/span><\/p>\n

      \u4e94\u3001\u7c7b\u578b\u8f6c\u6362（\u81ea\u52a8 + \u5f3a\u5236）<\/h4>\n

      \u81ea\u52a8\u7c7b\u578b\u8f6c\u6362（\u4ece\u5c0f \u2192 \u5927，\u5b89\u5168）<\/p>\n

      byte \u2192 short \u2192 int \u2192 long \u2192 float \u2192 double char \u2192 int<\/p>\n

      \u5f3a\u5236\u7c7b\u578b\u8f6c\u6362（\u53ef\u80fd\u4e22\u5931\u7cbe\u5ea6）<\/p>\n

      int<\/span> i =<\/span> 100<\/span>;<\/span>
      \nbyte<\/span> b =<\/span> (<\/span>byte<\/span>)<\/span> i;<\/span> \/\/ \u5f3a\u5236<\/span><\/p>\n

      double<\/span> d =<\/span> 3.99<\/span>;<\/span>
      \nint<\/span> n =<\/span> (<\/span>int<\/span>)<\/span> d;<\/span> \/\/ 3（\u76f4\u63a5\u622a\u65ad，\u4e0d\u662f\u56db\u820d\u4e94\u5165）<\/span><\/p>\n

      long<\/span> l =<\/span> 9999999999L<\/span>;<\/span>
      \nint<\/span> m =<\/span> (<\/span>int<\/span>)<\/span> l;<\/span> \/\/ \u6ea2\u51fa！\u5f97\u5230\u8d1f\u6570\u6216\u4e71\u503c<\/span><\/p>\n

      \u5e38\u89c1\u9677\u9631：<\/p>\n

      byte<\/span> x =<\/span> 1<\/span>;<\/span>
      \nbyte<\/span> y =<\/span> 2<\/span>;<\/span>
      \n\/\/ byte z = x + y; \/\/ \u9519！int + int = int<\/span>
      \nbyte<\/span> z =<\/span> (<\/span>byte<\/span>)<\/span>(<\/span>x +<\/span> y)<\/span>;<\/span> \/\/ \u6b63\u786e<\/span><\/p>\n

      \u516d\u3001\u8fd0\u7b97\u7b26（\u4f18\u5148\u7ea7 + \u5e38\u89c1\u5751）<\/h4>\n\n\u7c7b\u522b\u8fd0\u7b97\u7b26\u4f18\u5148\u7ea7\u5751\u70b9 \/ \u6ce8\u610f<\/tr>\n\n\n\n\n\n\n\n
      \u7b97\u672f<\/td>\n+ – * \/ % ++ \u2013<\/td>\n\u9ad8<\/td>\n\/ \u6574\u6570\u9664\u6cd5\u76f4\u63a5\u622a\u65ad；% \u53ef\u7528\u4e8e\u8d1f\u6570<\/td>\n<\/tr>\n
      \u5173\u7cfb<\/td>\n> < >= <= == !=<\/td>\n\u4e2d<\/td>\n== \u6bd4\u8f83\u57fa\u672c\u7c7b\u578b\u503c，\u5f15\u7528\u7c7b\u578b\u6bd4\u8f83\u5730\u5740<\/td>\n<\/tr>\n
      \u903b\u8f91<\/td>\n&& || ! \u77ed\u8def\u4e0e\/\u6216<\/td>\n\u4e2d<\/td>\n&& \u5de6false\u53f3\u4e0d\u6267\u884c；|| \u5de6true\u53f3\u4e0d\u6267\u884c<\/td>\n<\/tr>\n
      \u4f4d\u8fd0\u7b97<\/td>\n& | ^ ~ << >> >>><\/td>\n\u4f4e<\/td>\n\u9762\u8bd5\u5e38\u8003：& vs &&，<< \u4e582，>>> \u65e0\u7b26\u53f7\u53f3\u79fb<\/td>\n<\/tr>\n
      \u8d4b\u503c<\/td>\n= += -= *= \/= %= <<= >>=<\/td>\n\u6700\u4f4e<\/td>\na += 5 \u7b49\u4ef7 a = (int)(a + 5)<\/td>\n<\/tr>\n
      \u4e09\u5143<\/td>\n\u6761\u4ef6 ? \u8868\u8fbe\u5f0f1 : \u8868\u8fbe\u5f0f2<\/td>\n\u2014<\/td>\n\u53ef\u5d4c\u5957，\u4f46\u522b\u5199\u592a\u590d\u6742<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u7ecf\u5178\u9762\u8bd5\u9898：<\/p>\n

      int<\/span> i =<\/span> 1<\/span>;<\/span>
      \ni =<\/span> i++<\/span>;<\/span> \/\/ i \u8fd8\u662f 1（\u5148\u7528\u540e\u52a0）<\/span>
      \ni =<\/span> ++<\/span>i;<\/span> \/\/ i \u53d8\u6210 2（\u5148\u52a0\u540e\u7528）<\/span><\/p>\n

      \u4e03\u3001\u6d41\u7a0b\u63a7\u5236（\u7a0b\u5e8f\u7684\u201c\u5927\u8111\u201d）<\/h4>\n
    • if-else \/ if-else if-else<\/li>\n
    • switch（Java 17+ \u652f\u6301 switch \u8868\u8fbe\u5f0f + \u6a21\u5f0f\u5339\u914d）<\/li>\n

      \/\/ \u4f20\u7edf switch<\/span>
      \nswitch<\/span> (<\/span>day)<\/span> {<\/span>
      \n case<\/span> 1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span> -><\/span> System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u5de5\u4f5c\u65e5"<\/span>)<\/span>;<\/span>
      \n case<\/span> 6<\/span>,<\/span> 7<\/span> -><\/span> System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u5468\u672b"<\/span>)<\/span>;<\/span>
      \n default<\/span> -><\/span> System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u975e\u6cd5"<\/span>)<\/span>;<\/span>
      \n}<\/span><\/p>\n

      \/\/ Java 14+ switch \u8868\u8fbe\u5f0f（\u63a8\u8350）<\/span>
      \nString<\/span> type =<\/span> switch<\/span> (<\/span>score \/<\/span> 10<\/span>)<\/span> {<\/span>
      \n case<\/span> 10<\/span>,<\/span> 9<\/span> -><\/span> "\u4f18\u79c0"<\/span>;<\/span>
      \n case<\/span> 8<\/span> -><\/span> "\u826f\u597d"<\/span>;<\/span>
      \n case<\/span> 7<\/span> -><\/span> "\u4e2d\u7b49"<\/span>;<\/span>
      \n default<\/span> -><\/span> "\u4e0d\u53ca\u683c"<\/span>;<\/span>
      \n}<\/span>;<\/span><\/p>\n

    • \u5faa\u73af：for \/ while \/ do-while \/ for-each<\/li>\n

      \/\/ for-each（\u6700\u5e38\u7528\u904d\u5386\u6570\u7ec4\/\u96c6\u5408）<\/span>
      \nfor<\/span> (<\/span>int<\/span> num :<\/span> arr)<\/span> {<\/span>
      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>num)<\/span>;<\/span>
      \n}<\/span><\/p>\n

    • break \/ continue \/ \u5e26\u6807\u7b7e\u7684\u8df3\u51fa<\/li>\n

      outer:<\/span> for<\/span> (<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> 5<\/span>;<\/span> i++<\/span>)<\/span> {<\/span>
      \n for<\/span> (<\/span>int<\/span> j =<\/span> 0<\/span>;<\/span> j <<\/span> 5<\/span>;<\/span> j++<\/span>)<\/span> {<\/span>
      \n if<\/span> (<\/span>j ==<\/span> 3<\/span>)<\/span> break<\/span> outer;<\/span> \/\/ \u8df3\u51fa\u53cc\u5c42\u5faa\u73af<\/span>
      \n }<\/span>
      \n}<\/span><\/p>\n

      \u516b\u3001\u6570\u7ec4（\u57fa\u7840\u6570\u636e\u7ed3\u6784）<\/h4>\n

      \/\/ \u58f0\u660e + \u521b\u5efa + \u521d\u59cb\u5316<\/span>
      \nint<\/span>[<\/span>]<\/span> arr1 =<\/span> new<\/span> int<\/span>[<\/span>5<\/span>]<\/span>;<\/span> \/\/ \u9ed8\u8ba4 0<\/span>
      \nint<\/span>[<\/span>]<\/span> arr2 =<\/span> {<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>}<\/span>;<\/span> \/\/ \u9759\u6001\u521d\u59cb\u5316<\/span>
      \nString<\/span>[<\/span>]<\/span> names =<\/span> new<\/span> String<\/span>[<\/span>]<\/span>{<\/span>"Tom"<\/span>,<\/span> "Jerry"<\/span>}<\/span>;<\/span><\/p>\n

      \/\/ \u4e8c\u7ef4\u6570\u7ec4（\u4e0d\u89c4\u5219\u4e5f\u884c）<\/span>
      \nint<\/span>[<\/span>]<\/span>[<\/span>]<\/span> matrix =<\/span> {<\/span>
      \n {<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>}<\/span>,<\/span>
      \n {<\/span>4<\/span>,<\/span> 5<\/span>}<\/span>,<\/span>
      \n {<\/span>6<\/span>,<\/span> 7<\/span>,<\/span> 8<\/span>,<\/span> 9<\/span>}<\/span>
      \n}<\/span>;<\/span><\/p>\n

      \u5e38\u89c1\u64cd\u4f5c：length\u3001\u904d\u5386\u3001\u62f7\u8d1d（System.arraycopy \u6216 Arrays.copyOf）<\/p>\n

      \u4e5d\u3001Scanner \u8f93\u5165（\u63a7\u5236\u53f0\u4ea4\u4e92\u5fc5\u5907）<\/h4>\n

      import<\/span> java.<\/span>util.<\/span><\/span>Scanner<\/span>;<\/span><\/p>\n

      Scanner<\/span> sc =<\/span> new<\/span> Scanner<\/span>(<\/span>System<\/span>.<\/span>in)<\/span>;<\/span>
      \nSystem<\/span>.<\/span>out.<\/span>print<\/span>(<\/span>"\u8bf7\u8f93\u5165\u5e74\u9f84："<\/span>)<\/span>;<\/span>
      \nint<\/span> age =<\/span> sc.<\/span>nextInt<\/span>(<\/span>)<\/span>;<\/span>
      \nString<\/span> name =<\/span> sc.<\/span>next<\/span>(<\/span>)<\/span>;<\/span> \/\/ \u8bfb\u5230\u7a7a\u683c\u505c\u6b62<\/span>
      \nString<\/span> line =<\/span> sc.<\/span>nextLine<\/span>(<\/span>)<\/span>;<\/span> \/\/ \u8bfb\u6574\u884c（\u5e38\u8ddf nextInt \u540e\u7528）<\/span><\/p>\n

      \u5751：nextInt() \u540e nextLine() \u4f1a\u8bfb\u5230\u56de\u8f66 \u2192 \u89e3\u51b3\u65b9\u6848：\u52a0\u4e00\u4e2a nextLine() \u5403\u6389\u56de\u8f66\u3002<\/p>\n

      \u603b\u7ed3：JavaSE \u8bed\u8a00\u57fa\u7840\u638c\u63e1\u5ea6\u81ea\u6d4b\u8868<\/h4>\n
        \n
      • \u80fd\u72ec\u7acb\u5199\u51fa HelloWorld \u5e76\u547d\u4ee4\u884c\u7f16\u8bd1\u8fd0\u884c<\/li>\n
      • \u80fd\u533a\u5206 8 \u5927\u57fa\u672c\u7c7b\u578b + \u5305\u88c5\u7c7b + \u9ed8\u8ba4\u503c<\/li>\n
      • \u719f\u7ec3\u4f7f\u7528\u53d8\u91cf\u3001\u5e38\u91cf\u3001\u547d\u540d\u89c4\u8303<\/li>\n
      • \u4f1a\u81ea\u52a8\/\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362 & \u5e38\u89c1\u6ea2\u51fa\u5751<\/li>\n
      • \u638c\u63e1\u6240\u6709\u8fd0\u7b97\u7b26\u4f18\u5148\u7ea7 & \u7ecf\u5178 i++ \/ ++i \u9898<\/li>\n
      • \u80fd\u5199\u51fa if \/ switch \/ \u4e09\u79cd\u5faa\u73af & break\/continue<\/li>\n
      • \u4f1a\u58f0\u660e\u3001\u4f7f\u7528\u4e00\u7ef4\/\u4e8c\u7ef4\u6570\u7ec4 & for-each<\/li>\n
      • \u4f1a\u7528 Scanner \u5b89\u5168\u8bfb\u5165\u5404\u79cd\u7c7b\u578b<\/li>\n<\/ul>\n

        \u638c\u63e1\u4ee5\u4e0a\u5185\u5bb9 \u2248 JavaSE \u8bed\u8a00\u57fa\u7840 70\u201380%（\u5269\u4e0b\u7684 20\u201330% \u662f\u9762\u5411\u5bf9\u8c61 + String + \u5f02\u5e38 + \u96c6\u5408\u57fa\u7840）\u3002<\/p>\n

        \u4f60\u73b0\u5728\u5904\u4e8e\u54ea\u4e2a\u9636\u6bb5？<\/p>\n

          \n
        • \u5b8c\u5168\u96f6\u57fa\u7840，\u60f3\u4ece\u73af\u5883\u642d\u5efa\u5f00\u59cb？<\/li>\n
        • \u5df2\u7ecf\u80fd\u5199\u7b80\u5355\u7a0b\u5e8f，\u60f3\u7cfb\u7edf\u8fc7\u4e00\u904d\u8bed\u6cd5\u5751？<\/li>\n
        • \u51c6\u5907\u9762\u8bd5，\u60f3\u91cd\u70b9\u5237\u5e38\u8003\u57fa\u7840\u9898？<\/li>\n<\/ul>\n

          \u544a\u8bc9\u6211\u4f60\u7684\u60c5\u51b5，\u6211\u53ef\u4ee5\u7ee7\u7eed\u7ed9\u4f60\u66f4\u9488\u5bf9\u6027\u7684\u4e0b\u4e00\u90e8\u5206（\u6bd4\u5982\u9762\u5411\u5bf9\u8c61\u3001String \u8be6\u89e3\u3001\u6570\u7ec4\u8fdb\u9636\u3001\u5e38\u89c1\u7b14\u8bd5\u9898\u7b49）～ 😄<\/p>\n","protected":false},"excerpt":{"rendered":"

          JavaSE – \u8bed\u8a00\u57fa\u7840 （2026 \u5e74\u89c6\u89d2 \u00b7 \u96f6\u57fa\u7840\u5230\u80fd\u5199\u5c0f\u9879\u76ee \u00b7 \u6838\u5fc3\u77e5\u8bc6\u70b9\u5168\u68b3\u7406 \u4ee3\u7801\u793a\u4f8b \u5e38\u89c1\u6613\u9519\u70b9）
          \nJavaSE（Standard Edition）\u662f Java \u7684\u6807\u51c6\u7248，\u4e5f\u662f\u6240\u6709 Java \u5f00\u53d1\u8005\u7684\u8d77\u70b9\u3002 \u8bed\u8a00\u57fa\u7840\u90e8\u5206\u4e3b\u8981\u6307：\u80fd\u72ec\u7acb\u5199\u51fa\u6b63\u786e\u3001\u53ef\u8bfb\u7684 Java \u7a0b\u5e8f \u7684\u90a3\u4e00\u5957\u8bed\u6cd5\u89c4\u5219\u548c\u6838\u5fc3\u673a\u5236\u3002
          \n\u4e0b\u9762\u6309\u5b9e\u9645\u5b66\u4e60\u987a\u5e8f \u9762\u8bd5\/\u9879\u76ee\u9ad8\u9891\u5ea6\u6574\u7406，\u5efa\u8bae\u6309\u8fd9\u4e2a\u987a\u5e8f<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[99],"topic":[],"class_list":["post-69439","post","type-post","status-publish","format-standard","hentry","category-server","tag-java"],"yoast_head":"\nJavaSE-\u8bed\u8a00\u57fa\u7840 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/69439.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JavaSE-\u8bed\u8a00\u57fa\u7840 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"JavaSE - \u8bed\u8a00\u57fa\u7840 （2026 \u5e74\u89c6\u89d2 \u00b7 \u96f6\u57fa\u7840\u5230\u80fd\u5199\u5c0f\u9879\u76ee \u00b7 \u6838\u5fc3\u77e5\u8bc6\u70b9\u5168\u68b3\u7406 \u4ee3\u7801\u793a\u4f8b \u5e38\u89c1\u6613\u9519\u70b9） JavaSE（Standard Edition）\u662f Java \u7684\u6807\u51c6\u7248，\u4e5f\u662f\u6240\u6709 Java \u5f00\u53d1\u8005\u7684\u8d77\u70b9\u3002 \u8bed\u8a00\u57fa\u7840\u90e8\u5206\u4e3b\u8981\u6307：\u80fd\u72ec\u7acb\u5199\u51fa\u6b63\u786e\u3001\u53ef\u8bfb\u7684 Java \u7a0b\u5e8f \u7684\u90a3\u4e00\u5957\u8bed\u6cd5\u89c4\u5219\u548c\u6838\u5fc3\u673a\u5236\u3002 \u4e0b\u9762\u6309\u5b9e\u9645\u5b66\u4e60\u987a\u5e8f \u9762\u8bd5\/\u9879\u76ee\u9ad8\u9891\u5ea6\u6574\u7406，\u5efa\u8bae\u6309\u8fd9\u4e2a\u987a\u5e8f\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/69439.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-31T09:41:02+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/69439.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/69439.html\",\"name\":\"JavaSE-\u8bed\u8a00\u57fa\u7840 - 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