{"id":103,"date":"2017-02-08T18:08:00","date_gmt":"2017-02-08T10:08:00","guid":{"rendered":"https:\/\/cn1.club\/?p=103"},"modified":"2025-03-13T20:14:24","modified_gmt":"2025-03-13T12:14:24","slug":"day2-%e7%ac%94%e8%ae%b0-%e5%ae%9a%e4%b9%89%e4%b8%8d%e5%90%8c%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e7%9a%84%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"https:\/\/cn1.club\/?p=103","title":{"rendered":"Day2 \u7b14\u8bb0 \u5b9a\u4e49\u4e0d\u540c\u6570\u636e\u7c7b\u578b\u7684\u53d8\u91cf"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >class  Demo1_DetaType  {\t\t\t\t\t\t\t\t\t\/\/DataType\u6570\u636e\u7c7b\u578b\n\tpublic static void main(String&#091;] args) {\n\t\t\/\/\u6574\u6570\u7c7b\u578b\n\t\tbyte b =10;\t\t\t\t\t\t\t\t\/\/\u5360\u4e00\u4e2a\u5b57\u8282,-128 \u5230 127\n\t\tshort s =20;\t\t\t\t\t\t\t\/\/\u5360\u4e24\u4e2a\u5b57\u8282\n\t\tint i =30;\t\t\t\t\t\t\t\t\/\/\u5360\u56db\u4e2a\u5b57\u8282\t\t\u6574\u6570\u9ed8\u8ba4\u7684\u6570\u636e\u7c7b\u578b\u5c31\u662fint\u7c7b\u578b\n\t\tlong x =8888888888L;\t\t\t\t\t\/\/\u5982\u679clong\u7c7b\u578b\u540e\u9762\u52a0L\u8fdb\u884c\u6807\u8bc6\u6700\u597d\u52a0\u5927L,\u56e0\u4e3a\u5c0fl\u592a\u50cf\u4e00\u4e86\n\t\tSystem.out.println(b);\n\t\tSystem.out.println(s);\n\t\tSystem.out.println(i);\n\t\tSystem.out.println(x);\n\t\tSystem.out.println(&quot;Hello World!&quot;);\n\n\t\t\/\/System.out.println(12345 + 5432l);    \u6b64\u9898\u53ef\u80fd\u9762\u8bd5\u8003\u4f1a\u7528\u5230.12345+54321=66666 \u4f46\u662f \u8bf7\u6ce8\u610f\u9898\u4e2d\u6709\u4e2a\u5730\u65b9\u662f\u5c0f\u5199L \u4e0d\u662f1\n\n\t\t\/\/\u6d6e\u70b9\u7c7b\u578b\n\t\tfloat f =12.3f;\t\t\t\t\/\/\u5360\u56db\u4e2a\u5b57\u8282\n\t\tdouble d =33.4;\t\t\t\t\/\/\u5360\u516b\u4e2a\u5b57\u8282\t\t\u5c0f\u6570\u9ed8\u8ba4\u7684\u6570\u636e\u7c7b\u578b\u662fdouble\n\t\tSystem.out.println(f);\n\t\tSystem.out.println(d);\n\n\t\t\/\/\u5b57\u7b26\u7c7b\u578b\n\t\tchar c =&#039;a&#039;;\t\t\t\t\/\/\u5360\u4e24\u4e2a\u5b57\u8282\n\t\tSystem.out.println(c);\n\n\t\t\/\/\u5e03\u5c14\u7c7b\u578b\n\t\tboolean b1 =true;\n\t\tboolean b2 =false;\n\t\tSystem.out.println(b1);\n\t\tSystem.out.println(b2);\n\n\t}\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":196,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[5],"tags":[],"class_list":["post-103","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-xuexi"],"_links":{"self":[{"href":"https:\/\/cn1.club\/index.php?rest_route=\/wp\/v2\/posts\/103","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn1.club\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn1.club\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn1.club\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cn1.club\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=103"}],"version-history":[{"count":0,"href":"https:\/\/cn1.club\/index.php?rest_route=\/wp\/v2\/posts\/103\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cn1.club\/index.php?rest_route=\/wp\/v2\/media\/196"}],"wp:attachment":[{"href":"https:\/\/cn1.club\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=103"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn1.club\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=103"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn1.club\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=103"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}