{"id":603,"date":"2023-01-14T10:35:27","date_gmt":"2023-07-02T08:30:23","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/java-13%e3%81%ae%e6%a9%9f%e8%83%bd\/"},"modified":"2025-08-01T00:59:52","modified_gmt":"2025-07-31T15:59:52","slug":"java-13%e3%81%ae%e6%a9%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java-13%e3%81%ae%e6%a9%9f%e8%83%bd\/","title":{"rendered":"Java 13\u306e\u6a5f\u80fd"},"content":{"rendered":"<p>Java 13\u306f\u30012019\u5e749\u670817\u65e5\u306b\u672c\u756a\u74b0\u5883\u3067\u306e\u4f7f\u7528\u304c\u958b\u59cb\u3055\u308c\u307e\u3057\u305f\u30026\u304b\u6708\u306e\u30ea\u30ea\u30fc\u30b9\u30b5\u30a4\u30af\u30eb\u306e\u305f\u3081\u3001Java 13\u306b\u306f\u958b\u767a\u8005\u7279\u5316\u306e\u6a5f\u80fd\u306f\u3042\u307e\u308a\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<h2>Java 13\u306e\u7279\u5fb4<\/h2>\n<p>\u65e5\u672c\u8a9e\u3067\u4ee5\u4e0b\u306e\u6587\u7ae0\u306e\u8a00\u3044\u63db\u3048\u3092\u3072\u3068\u3064\u63d0\u4f9b\u3057\u307e\u3059\uff1a<br \/>\nJava 13\u306e\u91cd\u8981\u306a\u6a5f\u80fd\u306e\u4e00\u90e8\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li>Text Blocks &#8211; JEP 355<\/li>\n<li>New Methods in String Class for Text Blocks<\/li>\n<li>Switch Expressions Enhancements &#8211; JEP 354<\/li>\n<li>Reimplement the Legacy Socket API &#8211; JEP 353<\/li>\n<li>Dynamic CDS Archive &#8211; JEP 350<\/li>\n<li>ZGC: Uncommit Unused Memory &#8211; JEP 351<\/li>\n<li>FileSystems.newFileSystem() Method<\/li>\n<li>Support for Unicode 12.1<\/li>\n<li>DOM and SAX Factories with Namespace Support<\/li>\n<\/ul>\n<h2>\u30d7\u30ec\u30d3\u30e5\u30fc\u6a5f\u80fd\u306e\u6709\u52b9\u5316\u65b9\u6cd5\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/h2>\n<p>\u30b9\u30a4\u30c3\u30c1\u5f0f\u3068\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u306f\u30d7\u30ec\u30d3\u30e5\u30fc\u6a5f\u80fd\u3067\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ec\u30d3\u30e5\u30fc\u6a5f\u80fd\u8a2d\u5b9a\u3092\u6709\u52b9\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u304b\u3089Java\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001&#8211;enable-preview\u30b9\u30a4\u30c3\u30c1\u3092\u4f7f\u7528\u3057\u3066\u6709\u52b9\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30d7\u30ec\u30d3\u30e5\u30fc\u6a5f\u80fd\u3092\u6709\u52b9\u306b\u3057\u305f\u307e\u307eJShell\u3092\u8d77\u52d5\u3059\u308b\u305f\u3081\u306b\u3082\u3001\u3053\u306e\u30b9\u30a4\u30c3\u30c1\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>$ jshell --enable-preview\r\n\r\n$ java --enable-preview --source 13 Test.java\r\n<\/code><\/pre>\n<p>\u3082\u3057Eclipse IDE\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306eJava\u30b3\u30f3\u30d1\u30a4\u30e9\u8a2d\u5b9a\u304b\u3089\u30d7\u30ec\u30d3\u30e5\u30fc\u6a5f\u80fd\u3092\u6709\u52b9\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564965fdaa94e2bdf7bfa4f\/8-0.png\" alt=\"Eclipse Enable Preview Features\" \/><\/div>\n<h2>1. \u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af &#8211; JEP 355<\/h2>\n<p>\u3053\u308c\u306f\u30d7\u30ec\u30d3\u30e5\u30fc\u6a5f\u80fd\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u8907\u6570\u884c\u306e\u6587\u5b57\u5217\u3092\u7c21\u5358\u306b\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u8907\u6570\u884c\u306e\u6587\u5b57\u5217\u306f\u3001\u4e09\u91cd\u306e\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3067\u56f2\u307e\u308c\u305f\u4e2d\u306b\u66f8\u304b\u308c\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u7528\u3057\u3066\u4f5c\u6210\u3055\u308c\u305f\u6587\u5b57\u5217\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306f\u3001\u8ffd\u52a0\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u3001\u8907\u6570\u884c\u306e\u6587\u5b57\u5217\u3092\u7c21\u5358\u306b\u4f5c\u6210\u3059\u308b\u305f\u3081\u306e\u3088\u308a\u7c21\u5358\u306a\u65b9\u6cd5\u3067\u3059\u3002\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u7528\u3057\u3066\u5358\u4e00\u884c\u306e\u6587\u5b57\u5217\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u59cb\u3081\u306e\u4e09\u91cd\u306e\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u5f8c\u306b\u306f\u3001\u884c\u7d42\u4e86\u5b50\u304c\u7d9a\u304b\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.java13.examples;\r\n\r\npublic class TextBlockString {\r\n\r\n\t\/**\r\n\t * JEP 355: Preview Feature\r\n\t *\/\r\n\t@SuppressWarnings(\"preview\")\r\n\tpublic static void main(String[] args) {\r\n\t\tString textBlock = \"\"\"\r\n\t\t\t\tHi\r\n\t\t\t\tHello\r\n\t\t\t\tYes\"\"\";\r\n\r\n\t\tString str = \"Hi\\nHello\\nYes\";\r\n\r\n\t\tSystem.out.println(\"Text Block String:\\n\" + textBlock);\r\n\t\tSystem.out.println(\"Normal String Literal:\\n\" + str);\r\n\r\n\t\tSystem.out.println(\"Text Block and String Literal equals() Comparison: \" + (textBlock.equals(str)));\r\n\t\tSystem.out.println(\"Text Block and String Literal == Comparison: \" + (textBlock == str));\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u51fa\u529b\uff1a<\/p>\n<pre class=\"post-pre\"><code>Text Block String:\r\nHi\r\nHello\r\nYes\r\nNormal String Literal:\r\nHi\r\nHello\r\nYes\r\nText Block and String Literal equals() Comparison: true\r\nText Block and String Literal == Comparison: true\r\n<\/code><\/pre>\n<p>\u79c1\u305f\u3061\u306eJava\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u7c21\u5358\u306bHTML\u3084JSON\u6587\u5b57\u5217\u3092\u4f5c\u6210\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>String textBlockHTML = \"\"\"\r\n\t\t&lt;html&gt;\r\n\t\t&lt;head&gt;\r\n\t\t\t&lt;link href='\/css\/style.css' rel='stylesheet' \/&gt;\r\n\t\t&lt;\/head&gt;\r\n\t\t&lt;body&gt;\r\n                        &lt;h1&gt;Hello World&lt;\/h1&gt;\r\n                &lt;\/body&gt;\r\n                &lt;\/html&gt;\"\"\";\r\n\r\nString textBlockJSON = \"\"\"\r\n\t\t{\r\n\t\t\t\"name\":\"Pankaj\",\r\n\t\t\t\"website\":\"JournalDev\"\r\n\t\t}\"\"\";\r\n<\/code><\/pre>\n<h2>2. \u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u306b\u5bfe\u3059\u308bString\u30af\u30e9\u30b9\u306e\u65b0\u3057\u3044\u30e1\u30bd\u30c3\u30c9<\/h2>\n<p>\u6587\u5b57\u5217\u30af\u30e9\u30b9\u306b\u306f\u3001\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u6a5f\u80fd\u306b\u95a2\u9023\u3059\u308b\u65b0\u3057\u3044\u30e1\u30bd\u30c3\u30c9\u304c3\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>formatted(Object&#8230; args): String format()\u30e1\u30bd\u30c3\u30c9\u306b\u4f3c\u3066\u3044\u307e\u3059\u3002\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u306b\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>stripIndent(): \u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u5185\u306e\u5404\u884c\u306e\u5148\u982d\u3068\u672b\u5c3e\u306e\u4e0d\u8981\u306a\u7a7a\u767d\u6587\u5b57\u3092\u524a\u9664\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u306b\u3088\u3063\u3066\u4f7f\u7528\u3055\u308c\u3001\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u76f8\u5bfe\u7684\u306a\u30a4\u30f3\u30c7\u30f3\u30c8\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>translateEscapes(): \u30a8\u30b9\u30b1\u30fc\u30d7\u30b7\u30fc\u30b1\u30f3\u30b9\u3092\u6587\u5b57\u5217\u30ea\u30c6\u30e9\u30eb\u3067\u3042\u308b\u304b\u306e\u3088\u3046\u306b\u5909\u63db\u3057\u305f\u6587\u5b57\u5217\u3092\u8fd4\u3057\u307e\u3059\u3002<\/ol>\n<pre class=\"post-pre\"><code>package com.scdev.java13.examples;\r\n\r\npublic class StringNewMethods {\r\n\r\n\t\/***\r\n\t * New methods are to be used with Text Block Strings\r\n\t * @param args\r\n\t *\/\r\n\t@SuppressWarnings(\"preview\")\r\n\tpublic static void main(String[] args) {\r\n\t\t\r\n\t\tString output = \"\"\"\r\n\t\t\t    Name: %s\r\n\t\t\t    Phone: %d\r\n\t\t\t    Salary: $%.2f\r\n\t\t\t    \"\"\".formatted(\"Pankaj\", 123456789, 2000.5555);\r\n\t\t\r\n\t\tSystem.out.println(output);\r\n\t\t\r\n\t\t\r\n\t\tString htmlTextBlock = \"&lt;html&gt;   \\n\"+\r\n\t\t\t\t                    \"\\t&lt;body&gt;\\t\\t \\n\"+\r\n\t\t\t\t                        \"\\t\\t&lt;p&gt;Hello&lt;\/p&gt;  \\t \\n\"+\r\n\t\t\t\t                    \"\\t&lt;\/body&gt; \\n\"+\r\n\t\t\t\t                \"&lt;\/html&gt;\";\r\n\t\tSystem.out.println(htmlTextBlock.replace(\" \", \"*\"));\r\n\t\tSystem.out.println(htmlTextBlock.stripIndent().replace(\" \", \"*\"));\r\n\t\t\r\n\t\tString str1 = \"Hi\\t\\nHello' \\\" \/u0022 Pankaj\\r\";\r\n\t\tSystem.out.println(str1);\r\n\t\tSystem.out.println(str1.translateEscapes());\r\n\t\t\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u7d50\u679c\uff1a<\/p>\n<pre class=\"post-pre\"><code>Name: Pankaj\r\nPhone: 123456789\r\nSalary: $2000.56\r\n\r\n&lt;html&gt;***\r\n\t&lt;body&gt;\t\t*\r\n\t\t&lt;p&gt;Hello&lt;\/p&gt;**\t*\r\n\t&lt;\/body&gt;*\r\n&lt;\/html&gt;\r\n&lt;html&gt;\r\n\t&lt;body&gt;\r\n\t\t&lt;p&gt;Hello&lt;\/p&gt;\r\n\t&lt;\/body&gt;\r\n&lt;\/html&gt;\r\nHi\t\r\nHello' \" \/u0022 Pankaj\r\nHi\t\r\nHello' \" \/u0022 Pankaj\r\n<\/code><\/pre>\n<h2>3. \u30b9\u30a4\u30c3\u30c1\u5f0f\u306e\u5f37\u5316 &#8211; JEP 354<\/h2>\n<p>Java 12\u306e\u30ea\u30ea\u30fc\u30b9\u3067\u306f\u3001\u30d7\u30ec\u30d3\u30e5\u30fc\u30d5\u30a3\u30fc\u30c1\u30e3\u30fc\u3068\u3057\u3066\u30b9\u30a4\u30c3\u30c1\u5f0f\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002Java 13\u3067\u306f\u307b\u3068\u3093\u3069\u540c\u3058\u3067\u3059\u304c\u3001\u300cbreak\u300d\u304c\u300cyield\u300d\u306b\u7f6e\u304d\u63db\u3048\u3089\u308c\u3001\u30b1\u30fc\u30b9\u6587\u304b\u3089\u5024\u3092\u8fd4\u3059\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.java13.examples;\r\n\r\n\/**\r\n * JEP 354: Switch Expressions\r\n * https:\/\/openjdk.java.net\/jeps\/354\r\n * @author scdev\r\n *\r\n *\/\r\npublic class SwitchEnhancements {\r\n\r\n\t@SuppressWarnings(\"preview\")\r\n\tpublic static void main(String[] args) {\r\n\t\tint choice = 2;\r\n\r\n\t\tswitch (choice) {\r\n\t\tcase 1:\r\n\t\t\tSystem.out.println(choice);\r\n\t\t\tbreak;\r\n\t\tcase 2:\r\n\t\t\tSystem.out.println(choice);\r\n\t\t\tbreak;\r\n\t\tcase 3:\r\n\t\t\tSystem.out.println(choice);\r\n\t\t\tbreak;\r\n\t\tdefault:\r\n\t\t\tSystem.out.println(\"integer is greater than 3\");\r\n\t\t}\r\n\r\n\t\t\/\/ from java 13 onwards - multi-label case statements\r\n\t\tswitch (choice) {\r\n\t\tcase 1, 2, 3:\r\n\t\t\tSystem.out.println(choice);\r\n\t\t\tbreak;\r\n\t\tdefault:\r\n\t\t\tSystem.out.println(\"integer is greater than 3\");\r\n\t\t}\r\n\r\n\t\t\/\/ switch expressions, use yield to return, in Java 12 it was break\r\n\t\tint x = switch (choice) {\r\n\t\tcase 1, 2, 3:\r\n\t\t\tyield choice;\r\n\t\tdefault:\r\n\t\t\tyield -1;\r\n\t\t};\r\n\t\tSystem.out.println(\"x = \" + x);\r\n\r\n\t}\r\n\r\n\tenum Day {\r\n\t\tSUN, MON, TUE\r\n\t};\r\n\r\n\t@SuppressWarnings(\"preview\")\r\n\tpublic String getDay(Day d) {\r\n\t\tString day = switch (d) {\r\n\t\tcase SUN -&gt; \"Sunday\";\r\n\t\tcase MON -&gt; \"Monday\";\r\n\t\tcase TUE -&gt; \"Tuesday\";\r\n\t\t};\r\n\t\treturn day;\r\n\t}\r\n}\r\n<\/code><\/pre>\n<h2>4. \u4f1d\u7d71\u7684\u306a\u30bd\u30b1\u30c3\u30c8API\u3092\u518d\u5b9f\u88c5\u3059\u308b- JEP 353<\/h2>\n<p>java.net.Socket\u304a\u3088\u3073java.net.ServerSocket\u306e\u4e0b\u90e8\u5b9f\u88c5\u306f\u66f8\u304d\u63db\u3048\u3089\u308c\u307e\u3057\u305f\u3002\u65b0\u3057\u3044\u5b9f\u88c5\u3067\u3042\u308bNioSocketImpl\u306f\u3001PlainSocketImpl\u306e\u4ee3\u66ff\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u5b9f\u88c5\u3067\u306f\u3001\u540c\u671f\u5316\u3055\u308c\u305f\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u306a\u304f\u3001java.util.concurrent\u306e\u30ed\u30c3\u30af\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u3082\u3057\u30ec\u30ac\u30b7\u30fc\u306a\u5b9f\u88c5\u3092\u4f7f\u7528\u3057\u305f\u3044\u5834\u5408\u306f\u3001java\u30aa\u30d7\u30b7\u30e7\u30f3-Djdk.net.usePlainSocketImpl\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>5. \u30c0\u30a4\u30ca\u30df\u30c3\u30afCDS\u30a2\u30fc\u30ab\u30a4\u30d6 &#8211; JEP 350<\/h2>\n<p>\u3053\u306eJEP\u306f\u3001Java 10\u3067\u5c0e\u5165\u3055\u308c\u305f\u30af\u30e9\u30b9\u30c7\u30fc\u30bf\u5171\u6709\u6a5f\u80fd\u3092\u62e1\u5f35\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001CDS\u30a2\u30fc\u30ab\u30a4\u30d6\u306e\u4f5c\u6210\u3068\u4f7f\u7528\u304c\u3088\u308a\u5bb9\u6613\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<pre class=\"post-pre\"><code>$ java -XX:ArchiveClassesAtExit=my_app_cds.jsa -cp my_app.jar\r\n\r\n$ java -XX:SharedArchiveFile=my_app_cds.jsa -cp my_app.jar\r\n<\/code><\/pre>\n<h2>6. ZGC: \u4f7f\u7528\u3055\u308c\u3066\u3044\u306a\u3044\u30e1\u30e2\u30ea\u306e\u30b3\u30df\u30c3\u30c8\u89e3\u9664 &#8211; JEP 351<\/h2>\n<p>\u3053\u306eJEP\u306f\u3001ZGC\u3092\u6539\u826f\u3057\u3066\u672a\u4f7f\u7528\u306e\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea\u3092\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306b\u8fd4\u3059\u3088\u3046\u306b\u3057\u307e\u3057\u305f\u3002Z\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30bf\u306f\u3001Java 11\u3067\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u524d\u306b\u308f\u305a\u304b\u306a\u4e00\u6642\u505c\u6b62\u6642\u9593\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u672a\u4f7f\u7528\u306e\u30e1\u30e2\u30ea\u306f\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306b\u8fd4\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u3053\u308c\u306f\u3001IoT\u3084\u30de\u30a4\u30af\u30ed\u30c1\u30c3\u30d7\u306a\u3069\u306e\u30e1\u30e2\u30ea\u306e\u30d5\u30c3\u30c8\u30d7\u30ea\u30f3\u30c8\u304c\u5c0f\u3055\u3044\u30c7\u30d0\u30a4\u30b9\u306b\u3068\u3063\u3066\u554f\u984c\u3067\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u3053\u308c\u306b\u3088\u3063\u3066\u672a\u4f7f\u7528\u306e\u30e1\u30e2\u30ea\u3092\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306b\u8fd4\u3059\u3088\u3046\u306b\u6539\u826f\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<h2>7. FileSystems.newFileSystem() \u30e1\u30bd\u30c3\u30c9<\/h2>\n<p>\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306e\u63d0\u4f9b\u8005\u3092\u3088\u308a\u7c21\u5358\u306b\u5229\u7528\u3059\u308b\u305f\u3081\u306b\u3001FileSystems\u30af\u30e9\u30b9\u306b\u306f3\u3064\u306e\u65b0\u3057\u3044\u30e1\u30bd\u30c3\u30c9\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u5185\u5bb9\u3092\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3068\u3057\u3066\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>Path\u3092\u4f7f\u7528\u3057\u3066\u65b0\u3057\u3044\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u4f5c\u6210\u3059\u308b<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>Path\u3068Map&lt;String, ?&gt;\u3092\u4f7f\u7528\u3057\u3066\u65b0\u3057\u3044\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u4f5c\u6210\u3059\u308b<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>Path\u3068Map&lt;String, ?&gt;\u3001ClassLoader\u3092\u4f7f\u7528\u3057\u3066\u65b0\u3057\u3044\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u4f5c\u6210\u3059\u308b<\/ol>\n<h2>8. \u540d\u524d\u7a7a\u9593\u306e\u30b5\u30dd\u30fc\u30c8\u3092\u5099\u3048\u305fDOM\u3068SAX\u30d5\u30a1\u30af\u30c8\u30ea<\/h2>\n<p>DOM\u3068SAX\u306e\u30d5\u30a1\u30af\u30c8\u30ea\u3092\u30cd\u30fc\u30e0\u30b9\u30da\u30fc\u30b9\u306e\u30b5\u30dd\u30fc\u30c8\u3092\u6301\u3064\u3088\u3046\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3059\u308b\u305f\u3081\u306e\u65b0\u3057\u3044\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u65b0\u3057\u3044\u30c7\u30d5\u30a9\u30eb\u30c8NS\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3059\u308b()<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u65b0\u3057\u3044NS\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3059\u308b()<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u6307\u5b9a\u3057\u305f\u30d5\u30a1\u30af\u30c8\u30ea\u30af\u30e9\u30b9\u540d\u3068\u30af\u30e9\u30b9\u30ed\u30fc\u30c0\u30fc\u3092\u4f7f\u7528\u3057\u3066\u65b0\u3057\u3044NS\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3059\u308b()<\/ol>\n<pre class=\"post-pre\"><code>\/\/java 13 onwards\r\nDocumentBuilder db = DocumentBuilderFactory.newDefaultNSInstance().newDocumentBuilder(); \r\n\r\n\/\/ before java 13\r\nDocumentBuilderFactory dbf = DocumentBuilderFactory.newDefaultInstance(); \r\ndbf.setNamespaceAware(true); \r\nDocumentBuilder db = dbf.newDocumentBuilder();\r\n<\/code><\/pre>\n<h2>\u7d50\u8ad6<\/h2>\n<p>6\u304b\u6708\u3054\u3068\u306eJava\u306e\u30ea\u30ea\u30fc\u30b9\u306f\u3046\u307e\u304f\u6a5f\u80fd\u3057\u3066\u3044\u308b\u3088\u3046\u3067\u3059\u3002\u958b\u767a\u8005\u5411\u3051\u306e\u7279\u5fb4\u306f\u3042\u307e\u308a\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u5168\u4f53\u7684\u306b\u7d20\u6674\u3089\u3057\u3044\u30ea\u30ea\u30fc\u30b9\u3067\u3059\u3002\u5f85\u3061\u306b\u5f85\u3063\u305f\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u306e\u6587\u5b57\u5217\u30b5\u30dd\u30fc\u30c8\u304c\u5b9f\u88c5\u3055\u308c\u305f\u306e\u3092\u898b\u308b\u306e\u306f\u826f\u3044\u3053\u3068\u3067\u3059\u3002<\/p>\n<h2>\u53c2\u8003\u6587\u732e<\/h2>\n<ul class=\"post-ul\">\n<li>JDK 13 Release Notes<\/li>\n<li>OpenJDK 13 Download Page<\/li>\n<li>Text Blocks Examples<\/li>\n<li>Eclipse.org Java 13 Examples<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Java 13\u306f\u30012019\u5e749\u670817\u65e5\u306b\u672c\u756a\u74b0\u5883\u3067\u306e\u4f7f\u7528\u304c\u958b\u59cb\u3055\u308c\u307e\u3057\u305f\u30026\u304b\u6708\u306e\u30ea\u30ea\u30fc\u30b9\u30b5\u30a4\u30af\u30eb\u306e\u305f\u3081\u3001Java 13\u306b\u306f\u958b\u767a\u8005\u7279\u5316\u306e\u6a5f\u80fd\u306f\u3042\u307e\u308a\u3042\u308a\u307e\u305b\u3093\u3002 Java 13\u306e\u7279\u5fb4 \u65e5\u672c\u8a9e\u3067\u4ee5\u4e0b\u306e\u6587\u7ae0\u306e\u8a00\u3044\u63db\u3048\u3092\u3072\u3068\u3064 [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-603","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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