{"id":111,"date":"2017-08-03T19:47:07","date_gmt":"2017-08-03T11:47:07","guid":{"rendered":"https:\/\/www.ray650128.com\/wordpress\/?p=111"},"modified":"2021-08-23T00:00:46","modified_gmt":"2021-08-22T16:00:46","slug":"androidkotlin%e5%9f%ba%e6%9c%ac%e6%8e%a7%e5%88%b6%e8%aa%9e%e6%b3%95","status":"publish","type":"post","link":"https:\/\/blog.ray650128.com\/?p=111","title":{"rendered":"[Android]Kotlin\u5b78\u7fd2\u7b46\u8a18#2-\u6d41\u7a0b\u63a7\u5236"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><span style=\"color: #993300;\"><strong><span class=\"has-inline-color has-black-color\">\u7c21\u55ae\u7684\u689d\u4ef6\u5224\u65b7<\/span><\/strong><\/span><\/h2>\n\n\n\n<p>\u4e00\u822c\u689d\u4ef6\u5224\u65b7\uff0c\u901a\u5e38\u90fd\u662f\u6307if-else\u5224\u65b7\u5f0f\uff0c\u5728Kotlin\u4e2d\u4e5f\u662f\u5982\u6b64\u3002<\/p>\n\n\n\n<p>\u4f46Kotlin\u7684if-else\u9084\u80fd\u62ff\u4f86\u4f5c\u70ba\u904b\u7b97\u4f7f\u7528\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"kotlin\" class=\"language-kotlin line-numbers\">fun main() {\n    val score = 60\n    val grade = if (score >= 60) \"\u53ca\u683c\" else \"\u4e0d\u53ca\u683c\"\n    println(\"\u5206\u6578: $score\")\n    println(\"\u6210\u7e3e: $grade\")\n}<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>\u7576score\u5927\u65bc\u6216\u7b49\u65bc60\u6642\uff0cgrade\u8f38\u51fa\u53ca\u683c\uff0c \u7d50\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">\u5206\u6578: 60\n\u6210\u7e3e: \u53ca\u683c<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>\u7576score\u5c0f\u65bc60\u6642\uff0cgrade\u8f38\u51fa\u4e0d\u53ca\u683c\uff0c\u7d50\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">\u5206\u6578: 59\n\u6210\u7e3e: \u4e0d\u53ca\u683c<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"color: #993300;\"><strong><span class=\"has-inline-color has-black-color\">\u591a\u689d\u4ef6\u5224\u65b7<\/span><\/strong><\/span><\/h2>\n\n\n\n<p>\u5728Java\u7684\u4e16\u754c\u88e1\uff0c\u591a\u689d\u4ef6\u5224\u65b7\u6709switch-case\u548cif-else\u5169\u7a2e\u65b9\u5f0f\u53ef\u4ee5\u9078\u64c7\u4f7f\u7528\uff0c\u4f46\u5728Kotlin\u5247\u662f\u7528when\u53d6\u4ee3\u3002<\/p>\n\n\n\n<p>when\u548cswitch-case\u4e00\u6a23\u53ef\u4ee5\u91dd\u5c0d\u689d\u4ef6\u505a\u5c0d\u61c9\u7684\u8655\u7406\uff0c\u4f46when\u7684\u529f\u80fd\u66f4\u5f37\u5927\uff0c\u4e14\u540c\u6a23\u53ef\u4ee5\u62ff\u4f86\u904b\u7b97\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"kotlin\" class=\"language-kotlin line-numbers\">fun main() {\n    val score = 98\n    val grade = when (score) {\n        in 96..100 -> \"\u7532\u4e0a\"\n        in 91..95 -> \"\u7532\"\n        in 86..90 -> \"\u7532\u4e0b\"\n        in 81..85 -> \"\u4e59\u4e0a\"\n        in 71..80 -> \"\u4e59\"\n        in 60..70 -> \"\u4e59\u4e0b\"\n        else -> \"\u4e0d\u5217\u5165\u8a55\u5206\"\n    }\n    \n    println(\"\u5206\u6578: $score\")\n    println(\"\u6210\u7e3e: $grade\")\n}\n<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>\u7576score=98\u6642\uff0c\u8f38\u51fa\u7d50\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">\u5206\u6578: 98\n\u6210\u7e3e: \u7532\u4e0a<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>\u7576score=63\u6642\uff0c\u8f38\u51fa\u7d50\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">\u5206\u6578: 63\n\u6210\u7e3e: \u4e59\u4e0b<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"color: #993300;\"><strong><span class=\"has-inline-color has-black-color\">for<\/span><\/strong><\/span>\u8ff4\u5708<\/h2>\n\n\n\n<p>\u4ee5\u4e0b\u662fKotlin\u7684for\u8ff4\u5708\uff0c\u7528..\u4ee3\u8868\u7bc4\u570d\uff0c\u4e5f\u5c31\u662f\u5f9e0~9\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"kotlin\" class=\"language-kotlin line-numbers\">fun main() {\n    for (i in 0..9) {\n        println(i)\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u8f38\u51fa\u7d50\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">0\n1\n2\n3\n4\n5\n6\n7\n8\n9<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>\u4e0b\u9762\u7684\u4f8b\u5b50\u662f\u75310~n-1\u7684\u65b9\u5f0f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"kotlin\" class=\"language-kotlin line-numbers\">fun main() {\n    for (i in 0 until 9) {\n        println(i)\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u8f38\u51fa\u7d50\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">0\n1\n2\n3\n4\n5\n6\n7\n8<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>\u9664\u4e86\u4e0a\u8ff0\u5169\u7a2e\u65b9\u5f0f\u4e4b\u5916\uff0cKotlin\u4e5f\u652f\u63f4step\uff0c\u7528\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">fun main() {\n    for (i in 0..9 step(2)) {\n        println(i)\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u8f38\u51fa\u7d50\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">0\n2\n4\n6\n8<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>\u6700\u5f8c\uff0c\u5c55\u793a\u4e00\u4e0b\u904d\u6b77\u96c6\u5408\u7684\u65b9\u5f0f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"kotlin\" class=\"language-kotlin line-numbers\">fun main() {\n    val array = intArrayOf(0, 2, 4, 6, 8, 10)\n    for (i in array) {\n        println(i)\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u8f38\u51fa\u7d50\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">0\n2\n4\n6\n8\n10<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"color: #993300;\"><strong><span class=\"has-inline-color has-black-color\">while\u8ff4\u5708<\/span><\/strong><\/span><\/h2>\n\n\n\n<p>Kotlin\u7684while\uff0c\u57fa\u672c\u4e0a\u7528\u6cd5\u8ddfJava\u4e00\u6a23\uff0c\u56e0\u6b64\u76f4\u63a5\u770b\u7a0b\u5f0f\u78bc\u5c31\u597d\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">while<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"kotlin\" class=\"language-kotlin line-numbers\">fun main() {\n    var i = 0\n    while(i &lt; 5) {\n        println(i)\n        i++\n    }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">do-while<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"kotlin\" class=\"language-kotlin line-numbers\">fun main() {\n    var i = 0\n    do {\n        println(i)\n        i++\n    } while (i &lt; 5)\n}<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>\u4ee5\u4e0a\u5c31\u662fKotlin\u6d41\u7a0b\u63a7\u5236\u90e8\u5206\u7684\u4e00\u4e9b\u7814\u7a76\u5fc3\u5f97\uff0c\u4e4b\u5f8c\u82e5\u6709\u66f4\u6df1\u5165\u7684\u7814\u7a76\uff0c\u6703\u518d\u88dc\u5145\u4e0a\u4f86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7c21\u55ae\u7684\u689d\u4ef6\u5224\u65b7 \u4e00\u822c\u689d\u4ef6\u5224\u65b7\uff0c\u901a\u5e38\u90fd\u662f\u6307if-else\u5224\u65b7\u5f0f\uff0c\u5728Kotlin\u4e2d\u4e5f\u662f\u5982\u6b64\u3002 \u4f46Kotlin\u7684if &hellip; <\/p>\n","protected":false},"author":1,"featured_media":113,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[10,19],"class_list":["post-111","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-2","tag-android-app","tag-kotlin"],"_links":{"self":[{"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/posts\/111","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=111"}],"version-history":[{"count":6,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/posts\/111\/revisions"}],"predecessor-version":[{"id":1138,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/posts\/111\/revisions\/1138"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/"}],"wp:attachment":[{"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=111"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}