{"id":779,"date":"2022-12-29T16:35:39","date_gmt":"2023-03-10T00:31:44","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/kotlin%e7%9a%84print%e3%80%81println%e3%80%81readline%e3%80%81scanner%e3%80%81repl%e7%9a%84%e5%8a%9f%e8%83%bd%e5%9c%a8%e4%b8%ad%e5%9b%bd%e6%9c%89%e4%bb%a5%e4%b8%8b%e9%80%89%e9%a1%b9-%e6%89%93\/"},"modified":"2025-08-03T07:31:22","modified_gmt":"2025-08-02T23:31:22","slug":"kotlin%e7%9a%84print%e3%80%81println%e3%80%81readline%e3%80%81scanner%e3%80%81repl%e7%9a%84%e5%8a%9f%e8%83%bd%e5%9c%a8%e4%b8%ad%e5%9b%bd%e6%9c%89%e4%bb%a5%e4%b8%8b%e9%80%89%e9%a1%b9-%e6%89%93","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/kotlin%e7%9a%84print%e3%80%81println%e3%80%81readline%e3%80%81scanner%e3%80%81repl%e7%9a%84%e5%8a%9f%e8%83%bd%e5%9c%a8%e4%b8%ad%e5%9b%bd%e6%9c%89%e4%bb%a5%e4%b8%8b%e9%80%89%e9%a1%b9-%e6%89%93\/","title":{"rendered":"Kotlin\u57fa\u7840\u6559\u7a0b\uff1a\u5168\u9762\u89e3\u6790print()\u3001println()\u3001readLine()\u3001Scanner\u4e0eREPL\u8f93\u5165\u8f93\u51fa\u529f\u80fd"},"content":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aKotlin\u7684print()\u3001println()\u3001readLine()\u3001Scanner\u3001REPL\u7684\u529f\u80fd\u8be6\u89e3\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51711\u90e8\u5206\uff09\u3002<\/p>\n<p>\u4eca\u5929\u6211\u4eec\u5c06\u5b66\u4e60\u5982\u4f55\u4f7f\u7528Kotlin\u7684\u6253\u5370\u51fd\u6570\u4ee5\u53ca\u5982\u4f55\u4ece\u63a7\u5236\u53f0\u83b7\u53d6\u548c\u89e3\u6790\u7528\u6237\u8f93\u5165\u3002\u6b64\u5916\uff0c\u6211\u4eec\u8fd8\u5c06\u4ecb\u7ecdKotlin REPL\u7684\u4f7f\u7528\u3002<\/p>\n<h2>Kotlin \u6253\u5370\u51fd\u6570<\/h2>\n<p>\u5728\u5c4f\u5e55\u4e0a\u8f93\u51fa\u5185\u5bb9\u4f7f\u7528\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>print()<\/li>\n<li>println()<\/li>\n<\/ul>\n<p>print\u8bed\u53e5\u5c06\u5176\u5185\u90e8\u7684\u6240\u6709\u5185\u5bb9\u6253\u5370\u5230\u5c4f\u5e55\u4e0a\u3002println\u8bed\u53e5\u5728\u8f93\u51fa\u672b\u5c3e\u8ffd\u52a0\u4e00\u4e2a\u6362\u884c\u7b26\u3002print\u8bed\u53e5\u5728\u5185\u90e8\u8c03\u7528System.out.print\u3002\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86print\u8bed\u53e5\u7684\u793a\u4f8b\u3002<\/p>\n<pre class=\"post-pre\"><code>fun main(args: Array&lt;String&gt;) {\r\nvar x = 5\r\nprint(x++)\r\nprintln(\"\u4f60\u597d\uff0c\u4e16\u754c\")\r\nprint(\"\u6050\u9f99\u8fd8\u5b58\u5728\u5417\uff1f\\n\")\r\nprint(false)\r\nprint(\"\\nx \u7684\u503c\u662f $x\u3002\")\r\nprintln(\" x \u5df2\u66f4\u65b0\uff01\uff01\")\r\nprint(\"x \u7b49\u4e8e 6 \u5417?: ${x == 6}\\n\")    \r\n}\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/656483e4a4b2f92e6c72f87d\/6-0.png\" alt=\"kotlin print println \u51fd\u6570\u793a\u4f8b\" \/><\/div>\n<h3>\u8f6c\u4e49\u5b57\u9762\u91cf\u548c\u8868\u8fbe\u5f0f<\/h3>\n<p>\u4e3a\u4e86\u9003\u907f\u7f8e\u5143\u7b26\u53f7\uff0c\u5e76\u4e14\u5c06${expression}\u4ec5\u89c6\u4e3a\u5b57\u7b26\u4e32\u800c\u975e\u8ba1\u7b97\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u5bf9\u5176\u8fdb\u884c\u8f6c\u4e49\u5904\u7406\u3002<\/p>\n<pre class=\"post-pre\"><code>fun main(args: Array&lt;String&gt;) {\r\nval y = \"\\${2 == 5}\"\r\nprintln(\"y = ${y}\")       \r\nprintln(\"\u6211\u4eec\u5728Python\u6216PHP\u4e2d\u4f7f\u7528$\u6765\u83b7\u53d6\u53d8\u91cf\u5417\uff1f\u4f8b\u5982\uff1a${'$'}x \u548c ${'$'}y\")\r\nval z = 5\r\nvar str = \"$z\"\r\nprintln(\"z \u7684\u503c\u662f $str\")\r\nstr = \"\\$z\"\r\nprintln(\"str \u7684\u503c\u662f $str\")\r\n}\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/656483e4a4b2f92e6c72f87d\/10-0.png\" alt=\"kotlin print \u8bed\u53e5\u8f6c\u4e49\u5b57\u9762\u91cf\" \/><\/div>\n<h3>\u6253\u5370\u51fd\u6570\u7684\u503c<\/h3>\n<pre class=\"post-pre\"><code>fun sumOfTwo(a: Int, b: Int) : Int{\r\n    return a + b\r\n}\r\n\r\nfun main(args: Array&lt;String&gt;) {\r\nval a = 2\r\nval b = 3\r\nprintln(\"${'$'}a \u548c ${'$'}b \u7684\u503c\u662f : ${sumOfTwo(a,b)}\") \r\nprintln(println(\"\u6253\u5370 ${'$'}a \u548c ${'$'}b \u7684\u503c\u662f : ${sumOfTwo(a,b)}\"))    \r\n}\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/656483e4a4b2f92e6c72f87d\/13-0.png\" alt=\"kotlin print \u8bed\u53e5\u6253\u5370\u51fd\u6570\u503c\" \/><\/div>\n<h2>Kotlin \u7528\u6237\u8f93\u5165<\/h2>\n<p>\u8981\u83b7\u53d6\u7528\u6237\u8f93\u5165\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>readLine()<\/li>\n<li>Scanner\u7c7b<\/li>\n<\/ul>\n<p>\u6ce8\u610f\uff1a\u7528\u6237\u8f93\u5165\u9700\u8981\u4f7f\u7528\u547d\u4ee4\u884c\u5de5\u5177\u3002\u60a8\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528REPL\u6216IntelliJ\u3002\u6211\u4eec\u5728\u8fd9\u91cc\u4f7f\u7528IntelliJ\u3002<\/p>\n<h3>\u4f7f\u7528readLine()\u51fd\u6570<\/h3>\n<p>&#8220;readLine()&#8221; \u8fd4\u56de\u7c7b\u578b\u4e3aString?\u7684\u503c\uff0c\u4ee5\u5904\u7406\u8bfb\u53d6\u6587\u4ef6\u672b\u5c3e\u7b49\u51fa\u73b0\u7684\u7a7a\u503c\u60c5\u51b5\u3002\u4e0b\u9762\u7684\u4ee3\u7801\u5c55\u793a\u4e86\u4f7f\u7528readLine()\u7684\u793a\u4f8b\u3002<\/p>\n<pre class=\"post-pre\"><code>fun main(args: Array&lt;String&gt;) {\r\n    println(\"\u8bf7\u8f93\u5165\u60a8\u7684\u59d3\u540d:\")\r\n    var name = readLine()\r\n    print(\"\u957f\u5ea6\u662f ${name?.length}\")\r\n}\r\n<\/code><\/pre>\n<p>\u7531\u4e8e\u9700\u8981\u4f7f\u7528String\u7c7b\u578b\u7684\u51fd\u6570\uff0c\u6211\u4eec\u9700\u8981\u5bf9\u53ef\u7a7a\u7c7b\u578b\u8fdb\u884c\u89e3\u5305\u3002\u53ea\u6709\u5f53\u4f60\u7edd\u5bf9\u786e\u5b9a\u503c\u4e0d\u4f1a\u4e3a\u7a7a\u65f6\uff0c\u624d\u4f7f\u7528!!\u6765\u5f3a\u5236\u5c06String?\u8f6c\u6362\u4e3aString\u3002\u5426\u5219\uff0c\u7a0b\u5e8f\u5c06\u4f1a\u5d29\u6e83\u3002\u5c06\u8f93\u5165\u8f6c\u6362\u4e3a\u6574\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\uff1a<\/p>\n<pre class=\"post-pre\"><code>fun main(args: Array&lt;String&gt;) {\r\nvar number = readLine()\r\ntry {\r\n        println(\"\u6570\u5b57\u4e58\u4ee55\u7684\u7ed3\u679c\u662f ${number?.toInt()?.times(5)}\")\r\n    } catch (ex: NumberFormatException) {\r\n        println(\"\u8f93\u5165\u7684\u6570\u5b57\u65e0\u6548\")\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u518d\u6b21\u4f7f\u7528 ?. \u8fd0\u7b97\u7b26\u5c06\u53ef\u7a7a\u7c7b\u578b\u8f6c\u6362\u4e3a\u6574\u6570\u7c7b\u578b\uff0c\u4f7f\u7528 toInt()\u3002\u7136\u540e\u6211\u4eec\u5c06\u7ed3\u679c\u4e58\u4ee55\u3002\u6301\u7eed\u8bfb\u53d6\u8f93\u5165 \u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 do while \u5faa\u73af\u6765\u6301\u7eed\u8bfb\u53d6\u8f93\u5165\uff0c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<pre class=\"post-pre\"><code>    do {\r\n        line = readLine()\r\n\r\n        if (line == \"quit\") {\r\n            println(\"\u5173\u95ed\u7a0b\u5e8f\")\r\n            break\r\n        }\r\n\r\n        println(\"\u56de\u663e $line\")\r\n\r\n    } while (true)\r\n}\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/656483e4a4b2f92e6c72f87d\/25-0.png\" alt=\"kotlin print \u8bed\u53e5\u5faa\u73af\u793a\u4f8b\" \/><\/div>\n<h3>\u4f7f\u7528split\u64cd\u4f5c\u7b26\u9605\u8bfb\u591a\u4e2a\u503c<\/h3>\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5206\u9694\u7b26\u6765\u8bfb\u53d6\u591a\u4e2a\u6570\u503c\uff0c\u5e76\u5c06\u5b83\u4eec\u4fdd\u5b58\u5728\u5982\u4e0b\u6240\u793a\u7684\u5143\u7ec4\u5f62\u5f0f\u4e2d\u3002<\/p>\n<pre class=\"post-pre\"><code>fun readIntegers(separator: Char = ',')\r\n        = readLine()!!.split(separator).map(String::toInt)\r\n\r\nfun main(args: Array&lt;String&gt;) {\r\n    println(\"\u8bf7\u8f93\u5165\u60a8\u7684\u503c:\")\r\n    try {\r\n        val (a, b, c) = readLine()!!.split(' ')\r\n        println(\"\u503c\u5206\u522b\u662f $a $b \u548c $c\")\r\n    } catch (ex: IndexOutOfBoundsException) {\r\n        println(\"\u65e0\u6548\u3002\u7f3a\u5c11\u503c\")\r\n    }\r\n\r\n    try {\r\n        val (x, y, z) = readIntegers()\r\n        println(\"x \u662f $x y \u662f $y z \u662f $z\")\r\n    } catch (ex: IndexOutOfBoundsException) {\r\n        println(\"\u65e0\u6548\u3002\u7f3a\u5c11\u503c\")\r\n    }\r\n    catch (ex: NumberFormatException) {\r\n        println(\"\u6570\u5b57\u65e0\u6548\")\r\n    }\r\n\r\n}\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/656483e4a4b2f92e6c72f87d\/29-0.png\" alt=\"kotlin print \u8bed\u53e5\u5206\u5272\u548c\u5f02\u5e38\u5904\u7406\" \/><\/div>\n<pre class=\"post-pre\"><code>val ints: List&lt;String&gt;? = readLine()?.split(\"|\".toRegex())\r\nprintln(ints)\r\n<\/code><\/pre>\n<h3>Kotlin\u7684Scanner\u7c7b<\/h3>\n<p>\u4e3a\u4e86\u63a5\u53d7\u8f93\u5165\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Scanner(System.`in`)\uff0c\u5b83\u4f1a\u4ece\u6807\u51c6\u8f93\u5165\u952e\u76d8\u63a5\u6536\u8f93\u5165\u3002\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5177\u4f53\u7528\u6cd5\uff1a<\/p>\n<pre class=\"post-pre\"><code>fun main(args: Array&lt;String&gt;) {\r\n    val reader = Scanner(System.`in`)\r\n    print(\"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6570\u5b57: \")\r\n\r\n    \/\/ nextInt() \u8bfb\u53d6\u4e0b\u4e00\u4e2a\u6574\u6570\u3002next() \u8bfb\u53d6\u5b57\u7b26\u4e32\r\n    var integer:Int = reader.nextInt()\r\n\r\n    println(\"\u60a8\u8f93\u5165\u7684\u662f: $integer\")\r\n<\/code><\/pre>\n<p>reader.nextInt() \u8bfb\u53d6\u4e0b\u4e00\u4e2a\u6574\u6570\u3002reader.next() \u8bfb\u53d6\u4e0b\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002reader.nextFloat() \u8bfb\u53d6\u4e0b\u4e00\u4e2a\u6d6e\u70b9\u6570\uff0c\u4f9d\u6b64\u7c7b\u63a8\u3002reader.nextLine() \u5c06\u626b\u63cf\u5668\u4f20\u9012\u7ed9\u4e0b\u4e00\u884c\u5e76\u6e05\u7a7a\u7f13\u51b2\u533a\u3002\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u76f4\u63a5\u5728\u6253\u5370\u8bed\u53e5\u4e2d\u8bfb\u53d6\u4e0d\u540c\u7c7b\u578b\u7684\u8f93\u5165\u3002<\/p>\n<pre class=\"post-pre\"><code>import java.util.*\r\n\r\nfun main(args: Array&lt;String&gt;) {\r\n\r\n    val reader = Scanner(System.`in`)\r\n    print(\"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6570\u5b57: \")\r\n\r\n    try {\r\n        var integer: Int = reader.nextInt()\r\n        println(\"\u60a8\u8f93\u5165\u7684\u662f: $integer\")\r\n    } catch (ex: InputMismatchException) {\r\n        println(\"\u8bf7\u8f93\u5165\u6709\u6548\u7684\u6570\u5b57\")\r\n    }\r\n    enterValues(reader)\r\n    \/\/\u5c06\u626b\u63cf\u5668\u79fb\u52a8\u5230\u4e0b\u4e00\u884c\uff0c\u5426\u5219\u7f13\u51b2\u8f93\u5165\u5c06\u4ec5\u5728\u6b64\u5904\u8bfb\u53d6\u4e0b\u4e00\u4e2a\u8f93\u5165\u3002\r\n    reader.nextLine()\r\n    enterValues(reader)\r\n}\r\n\r\nfun enterValues(reader: Scanner) {\r\n    println(\"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6d6e\u70b9\u6570\/\u5e03\u5c14\u503c :\")\r\n    try {\r\n        print(\"\u503c: ${reader.nextFloat()}, ${reader.nextBoolean()}\")\r\n    } catch (ex: InputMismatchException) {\r\n        println(\"\u7b2c\u4e00\u4e2a\u503c\u5e94\u8be5\u662f\u6d6e\u70b9\u6570\uff0c\u7b2c\u4e8c\u4e2a\u5e94\u8be5\u662f\u5e03\u5c14\u503c\u3002(\u7528\u56de\u8f66\u952e\u5206\u9694)\")\r\n    }\r\n}\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/656483e4a4b2f92e6c72f87d\/36-0.png\" alt=\"kotlin scanner \u7c7b\u793a\u4f8b\" \/><\/div>\n<h2>Kotlin REPL\u8be6\u89e3<\/h2>\n<p>REPL\u4e5f\u79f0\u4e3aRead-Eval-Print-Loop\uff08\u8bfb\u53d6-\u6c42\u503c-\u6253\u5370-\u5faa\u73af\uff09\uff0c\u7528\u4e8e\u76f4\u63a5\u5728\u4ea4\u4e92\u5f0fShell\u4e2d\u8fd0\u884c\u4ee3\u7801\u7684\u4e00\u90e8\u5206\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u542f\u52a8Kotlin\u7f16\u8bd1\u5668\u6765\u5728\u7ec8\u7aef\/\u547d\u4ee4\u884c\u4e2d\u6267\u884c\u6b64\u64cd\u4f5c\u3002<\/p>\n<h3>\u5b89\u88c5\u547d\u4ee4\u884c\u7f16\u8bd1\u5668<\/h3>\n<p>\u6211\u4eec\u53ef\u4ee5\u6309\u7167\u8fd9\u91cc\u6f14\u793a\u7684\u65b9\u6cd5\uff0c\u5728Mac\/Windows\/Ubuntu\u4e0a\u5b89\u88c5\u547d\u4ee4\u884c\u7f16\u8bd1\u5668\u3002\u901a\u5e38\uff0c\u5728Mac\u4e0a\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u7ec8\u7aef\u4f7f\u7528HomeBrew\u6765\u5b89\u88c5Kotlin\u7f16\u8bd1\u5668\u3002<\/p>\n<pre class=\"post-pre\"><code>brew update\r\nbrew install kotlin\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/656483e4a4b2f92e6c72f87d\/42-0.png\" alt=\"kotlin REPL \u793a\u4f8b\" \/><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aKotlin\u7684print()\u3001println()\u3001readLine()\u3001Scanner\u3001REPL\u7684\u529f [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[2091,1472,1748,275,1778],"class_list":{"0":"post-779","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-uncategorized","7":"tag-kotlin","10":"tag-275","11":"tag-1778"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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