{"id":1467,"date":"2022-11-05T17:12:31","date_gmt":"2022-11-05T09:12:31","guid":{"rendered":"https:\/\/qaqaq.top\/?p=1467"},"modified":"2022-11-27T12:39:44","modified_gmt":"2022-11-27T04:39:44","slug":"java9%e6%96%b0%e7%89%b9%e6%80%a7%ef%bc%9ajava91011%e6%96%b0%e7%89%b9%e6%80%a7%e5%b7%a5%e5%8e%82%e6%96%b9%e6%b3%95%e5%88%9b%e5%bb%ba%e5%8f%aa%e8%af%bbjava91011%e6%96%b0%e7%89%b9%e6%80%a7%e3%80%81ja","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=1467","title":{"rendered":"java9\u65b0\u7279\u6027\uff1aJava9&#038;10&#038;11\u65b0\u7279\u6027\u5de5\u5382\u65b9\u6cd5\u521b\u5efa\u53ea\u8bfbJava9&#038;10&#038;11\u65b0\u7279\u6027\u3001java9\u65b0\u7279\u6027\uff1aInputStream\u4e2d\u7684transferTo()\u65b9\u6cd5"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P702;\r\n\r\n\r\nimport org.junit.jupiter.api.Test;\r\n\r\nimport java.io.FileOutputStream;\r\nimport java.io.IOException;\r\nimport java.io.InputStream;\r\nimport java.io.OutputStream;\r\nimport java.util.*;\r\n\r\n\/**\r\n * @author RichieZhang\r\n * @create 2022-11-05 \u4e0b\u5348 12:50\r\n *\/\r\npublic class Java9Test1 {\r\n\r\n    \/\/java9\u65b0\u7279\u6027\u516b\uff1a\u96c6\u5408\u5de5\u5382\u65b9\u6cd5\uff1a\u521b\u5efa\u53ea\u8bfb\u96c6\u5408\r\n    \/\/java8\u4e2d\u7684\u5199\u6cd5\uff1a\r\n\r\n    @Test\r\n    public void test1() {\r\n        List&lt;String> namesList = new ArrayList&lt;>();\r\n        namesList.add(\"Joe\");\r\n        namesList.add(\"Bob\");\r\n        namesList.add(\"Bill\");\r\n        \/\/\u8fd4\u56de\u7684namelist\u662f\u4e00\u4e2a\u53ea\u8bfb\u7684\u96c6\u5408\r\n        namesList = Collections.unmodifiableList(namesList);\r\n\r\n        namesList.add(\"Tom\");\r\n        System.out.println(namesList);\r\n    }\r\n\r\n    @Test\r\n    public void test2() {\r\n        List&lt;String> list = Collections.unmodifiableList(Arrays.asList(\"a\", \"b\", \"c\"));\r\n        Set&lt;String> set = Collections.unmodifiableSet(new HashSet&lt;>(Arrays.asList(\"a\", \"b\", \"c\")));\r\n        \/\/ \u5982\u4e0b\u64cd\u4f5c\u4e0d\u9002\u7528\u4e8ejdk 8 \u53ca\u4e4b\u524d\u7248\u672c,\u9002\u7528\u4e8ejdk 9\r\n        Map&lt;String, Integer> map = Collections.unmodifiableMap(new HashMap&lt;>() {\r\n            {\r\n                put(\"a\", 1);\r\n                put(\"b\", 2);\r\n                put(\"c\", 3);\r\n            }\r\n        });\r\n        map.forEach((k, v) -> System.out.println(k + \":\" + v));\r\n    }\r\n\r\n    @Test\r\n    public void test3() {\r\n        \/\/\u6b64\u65f6\u5f97\u5230\u7684\u96c6\u5408list\u4e5f\u662f\u4e00\u4e2a\u53ea\u8bfb\u96c6\u5408\u3002\r\n        List&lt;Integer> list = Arrays.asList(1, 2, 3, 4, 5);\r\n        \/\/\u62a5\u5f02\u5e38\r\n        list.add(6);\r\n    }\r\n\r\n    \/\/java9\u65b0\u7279\u6027\u516b\uff1a\u96c6\u5408\u5de5\u5382\u65b9\u6cd5\uff1a\u521b\u5efa\u53ea\u8bfb\u96c6\u5408\r\n    @Test\r\n    public void test4() {\r\n        List&lt;Integer> list1 = List.of(1, 2, 3, 4, 5);\r\n        \/\/\u4e0d\u80fd\u6dfb\u52a0\r\n\/\/        list1.add(6);\r\n\r\n        System.out.println(list1);\r\n\r\n        Set&lt;Integer> set1 = Set.of(23, 3, 54, 65, 43, 76, 87, 34, 46);\r\n        \/\/\u4e0d\u80fd\u6dfb\u52a0\r\n\/\/        set1.add(4);\r\n        System.out.println(set1);\r\n\r\n        Map&lt;String, Integer> map1 = Map.of(\"Tom\", 23, \"Jerry\", 54, \"HanMeimei\", 12);\r\n        \/\/\u4e0d\u80fd\u6dfb\u52a0\r\n\/\/        map1.put(\"LiLei\",34);\r\n        System.out.println(map1);\r\n\r\n        Map&lt;String, Integer> map2 = Map.ofEntries(Map.entry(\"Tom\", 34), Map.entry(\"Jerry\", 21));\r\n\/\/        map2.put(\"LiLei\",34);\r\n        System.out.println(map2);\r\n    }\r\n\r\n    \/\/java9\u65b0\u7279\u6027\u4e5d\uff1aInputStream\u7684\u65b0\u65b9\u6cd5: tranferTo()\r\n    @Test\r\n    public void test5() {\r\n        ClassLoader cl = this.getClass().getClassLoader();\r\n        try (InputStream is = cl.getResourceAsStream(\"hello.txt\");\r\n             OutputStream os = new FileOutputStream(\"src\\\\hello1.txt\")) {\r\n            is.transferTo(os); \/\/ \u628a\u8f93\u5165\u6d41\u4e2d\u7684\u6240\u6709\u6570\u636e\u76f4\u63a5\u81ea\u52a8\u5730\u590d\u5236\u5230\u8f93\u51fa\u6d41\u4e2d\r\n        } catch (IOException e) {\r\n            e.printStackTrace();\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[46],"class_list":["post-1467","post","type-post","status-publish","format-standard","hentry","category-java-code","tag-java"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1467"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1467"}],"version-history":[{"count":1,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1467\/revisions"}],"predecessor-version":[{"id":1468,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1467\/revisions\/1468"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1467"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1467"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1467"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}