{"id":343,"date":"2023-07-24T08:16:04","date_gmt":"2023-09-10T08:57:37","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%87%e5%ad%97%e5%88%97%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0\/"},"modified":"2025-07-31T22:49:52","modified_gmt":"2025-07-31T13:49:52","slug":"java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%87%e5%ad%97%e5%88%97%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%87%e5%ad%97%e5%88%97%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0\/","title":{"rendered":"Java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0"},"content":{"rendered":"<p>\u65e5\u672c\u8a9e\u3067\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u8a00\u3044\u63db\u3048\u3089\u308c\u307e\u3059\uff1a\u300cString\u30af\u30e9\u30b9\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u6700\u3082\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b\u30af\u30e9\u30b9\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001Java\u306e\u9762\u63a5\u3067\u306fString\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f7f\u7528\u3057\u3066\u3001\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u30b9\u30ad\u30eb\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u300d<\/p>\n<h2>Java\u3067\u306e\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0<\/h2>\n<p>\u79c1\u306f\u3053\u3053\u3067\u3001Java\u306e\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u554f\u984c\u3092\u81ea\u5206\u3067\u89e3\u3044\u3066\u304b\u3089\u7b54\u3048\u3092\u78ba\u8a8d\u3057\u3001\u3088\u308a\u826f\u3044\u65b9\u6cd5\u3067\u5b66\u7fd2\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u79c1\u306fJava\u3067\u5c0e\u5165\u3055\u308c\u305f\u6700\u65b0\u306e\u6a5f\u80fd\u3001\u4f8b\u3048\u3070Stream\u3001\u30e9\u30e0\u30c0\u5f0f\u3001\u95a2\u6570\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306a\u3069\u3092\u4f7f\u7528\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3>\u6587\u5b57\u5217\u5185\u306e\u7570\u306a\u308b\u6587\u5b57\u3068\u305d\u306e\u6570\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n<pre class=\"post-pre\"><code>package com.scdev.java.string;\r\n\r\nimport java.util.HashMap;\r\nimport java.util.List;\r\nimport java.util.Map;\r\nimport java.util.stream.Collectors;\r\n\r\npublic class DistinctCharsCount {\r\n\r\n\tpublic static void main(String[] args) {\r\n\r\n\t\tprintDistinctCharsWithCount(\"abc\");\r\n\t\tprintDistinctCharsWithCount(\"abcab3\");\r\n\t\tprintDistinctCharsWithCount(\"hi there, i am scdev\");\r\n\t}\r\n\r\n\tprivate static void printDistinctCharsWithCount(String input) {\r\n\t\tMap&lt;Character, Integer&gt; charsWithCountMap = new HashMap&lt;&gt;();\r\n\r\n\t\t\/\/ using Map merge method from Java 8\r\n\t\tfor (char c : input.toCharArray())\r\n\t\t\tcharsWithCountMap.merge(c, 1, Integer::sum);\r\n\t\tSystem.out.println(charsWithCountMap);\r\n\r\n\t\t\/\/ another way using latest Java enhancements and no for loop, a bit complex though\r\n\t\tList&lt;Character&gt; list = input.chars().mapToObj(c -&gt; (char) c).collect(Collectors.toList());\r\n\r\n\t\tlist.stream().forEach(c -&gt; charsWithCountMap.merge(c, 1, Integer::sum));\r\n\r\n\t\tSystem.out.println(charsWithCountMap);\r\n\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<h3>Java\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u6210\u3057\u3066\u3001\u6587\u5b57\u5217\u3092\u9006\u306b\u3059\u308b\u3002<\/h3>\n<p>\u6587\u5b57\u5217\u3092\u53cd\u8ee2\u3055\u305b\u308b\u65b9\u6cd5\u306f\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002\u4e00\u822c\u7684\u306a\u3082\u306e\u306e\u4e00\u90e8\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>StringBuilder\/StringBuffer reverse() method<\/li>\n<li>Using char\/byte array and traverse in reverse direction and populate the result string<\/li>\n<\/ul>\n<p>\u305f\u3060\u3057\u3001\u5165\u529b\u306e\u6587\u5b57\u5217\u306e\u5185\u5bb9\u304c\u78ba\u5b9f\u3067\u306a\u3044\u5834\u5408\u306f\u3001\u5e38\u306bStringBuilder\u306e\u7d44\u307f\u8fbc\u307f\u306ereverse()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u306a\u305c\u306a\u3089\u3001char\u304a\u3088\u3073byte\u914d\u5217\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u610f\u56f3\u3057\u306a\u3044\u7d50\u679c\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u304b\u3089\u3067\u3059\u3002\u3053\u306e\u70b9\u306b\u3064\u3044\u3066\u306f\u3001\u300cJava\u3067\u6587\u5b57\u5217\u3092\u9006\u306b\u3059\u308b\u300d\u306e\u8a18\u4e8b\u3067\u8a73\u7d30\u306a\u8aac\u660e\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.java.string;\r\n\r\npublic class ReverseAString {\r\n\r\n\tpublic static void main(String[] args) {\r\n\r\n\t\treverseInputString(\"abc\");\r\n\t\treverseInputString(\"\u00e7\u00a9\u2206\u02d9\u00a8\u02da\u00f8\"); \/\/special chars\r\n\t}\r\n\r\n\tprivate static void reverseInputString(String input) {\r\n\t\tStringBuilder sb = new StringBuilder(input);\r\n\t\tString result = sb.reverse().toString();\r\n\t\tSystem.out.println(result);\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<h3>\u6587\u5b57\u5217\u304c\u56de\u6587\u3067\u3042\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5<\/h3>\n<p>\u56de\u6587\u6587\u5b57\u5217\u3068\u306f\u3001\u305d\u306e\u9006\u3082\u540c\u3058\u6587\u5b57\u5217\u3067\u3042\u308b\u3082\u306e\u3067\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u5165\u529b\u3055\u308c\u305f\u6587\u5b57\u5217\u3092\u53cd\u8ee2\u3055\u305b\u3066\u3001\u305d\u308c\u3089\u304c\u7b49\u3057\u3044\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u306f\u3001String\u306echarAt(int index)\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u56de\u6587\u6587\u5b57\u5217\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.java.string;\r\n\r\npublic class PalindromeString {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\t\r\n\t\tcheckPalindromeString(\"abc\");\r\n\t\tcheckPalindromeString(\"abcba\");\r\n\t\tcheckPalindromeString(\"\u00e7\u2202\u00a9\u2202\u00e7\");\r\n\t}\r\n\r\n\tprivate static void checkPalindromeString(String input) {\r\n\t\tboolean result = true;\r\n\t\tint length = input.length();\r\n\t\tfor(int i=0; i &lt; length\/2; i++) {\r\n\t\t\tif(input.charAt(i) != input.charAt(length-i-1)) {\r\n\t\t\t\tresult = false;\r\n\t\t\t\tbreak;\r\n\t\t\t}\r\n\t\t}\r\n\t\tSystem.out.println(input + \" is palindrome = \"+result);\r\n\t\t\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<h3>\u4e0e\u3048\u3089\u308c\u305f\u6587\u5b57\u5217\u304b\u3089\u7279\u5b9a\u306e\u6587\u5b57\u306e\u51fa\u73fe\u3092\u3059\u3079\u3066\u524a\u9664\u3059\u308b\u65b9\u6cd5\u306f\uff1f<\/h3>\n<p>String\u30af\u30e9\u30b9\u306b\u306f\u524a\u9664\u6a5f\u80fd\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u3053\u306e\u5834\u5408\u306freplaceAll()\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u305d\u308c\u3092\u884c\u3046\u65b9\u6cd5\u3092\u793a\u3057\u305f\u7c21\u5358\u306a\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.java.string;\r\n\r\npublic class RemoveCharFromString {\r\n\r\n\tpublic static void main(String[] args) {\r\n\r\n\t\tremoveCharFromString(\"abcbcdjfkd\", 'c');\r\n\t\tremoveCharFromString(\"Pankaj\", 'a');\r\n\t\tremoveCharFromString(\"\u00e7\u2202\u00a9\u2202\u00e7\", '\u00a9');\r\n\r\n\t}\r\n\r\n\tprivate static void removeCharFromString(String input, char c) {\r\n\t\tString result = input.replaceAll(String.valueOf(c), \"\");\r\n\t\tSystem.out.println(result);\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<h3>\u6587\u5b57\u5217\u304c\u30d7\u30ed\u30b0\u30e9\u30e0\u4e0a\u3067\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u3067\u3042\u308b\u3053\u3068\u3092\u3069\u306e\u3088\u3046\u306b\u8a3c\u660e\u3059\u308b\u304b\uff1f<\/h3>\n<p>\u79c1\u305f\u3061\u306f\u3001Java\u3067\u306fString\u304c\u4e0d\u5909\uff08immutable\uff09\u3067\u3042\u308b\u3053\u3068\u3092\u77e5\u3063\u3066\u3044\u307e\u3059\u304c\u3001\u65b0\u3057\u3044\u958b\u767a\u8005\u306f\u307e\u3060\u3053\u308c\u306b\u6df7\u4e71\u3057\u307e\u3059\u3002\u3053\u306e\u6df7\u4e71\u306e\u7406\u7531\u3092\u7406\u89e3\u3057\u3088\u3046\u3068\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code>String s1 = \"Java\";\r\n\r\ns1 = \"Python\"; \r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u30b9\u30cb\u30da\u30c3\u30c8\u3067\u306f\u3001s1\u306e\u5024\u304c\u5909\u66f4\u3055\u308c\u3001\u305d\u308c\u306fString\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3059\u3002\u3067\u306f\u3001\u3069\u306e\u3088\u3046\u306b\u3057\u3066String\u304c\u4e0d\u5909\u3067\u3042\u308b\u3068\u8a00\u3048\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u6700\u3082\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u306f\u3001Java\u3067\u6587\u5b57\u5217\u304c\u4f5c\u6210\u3055\u308c\u308b\u65b9\u6cd5\u3067\u3059\u3002\u6587\u5b57\u5217\u30ea\u30c6\u30e9\u30eb\u3092\u4f7f\u7528\u3057\u3066\u6587\u5b57\u5217\u3092\u4f5c\u6210\u3059\u308b\u5834\u5408\u3001\u5143\u306e\u6587\u5b57\u5217\u306e\u5024\u306f\u5909\u66f4\u3055\u308c\u307e\u305b\u3093\u3002\u4ee3\u308f\u308a\u306b\u3001\u6587\u5b57\u5217\u30d7\u30fc\u30eb\u5185\u306b\u65b0\u3057\u3044\u6587\u5b57\u5217\u304c\u4f5c\u6210\u3055\u308c\u3001\u5909\u6570\u306e\u53c2\u7167\u304c\u5909\u66f4\u3055\u308c\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u5143\u306e\u6587\u5b57\u5217\u306e\u5024\u306f\u5909\u66f4\u3055\u308c\u305a\u3001\u305d\u308c\u304c\u6587\u5b57\u5217\u306e\u4e0d\u5909\u6027\u306e\u7406\u7531\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u3001\u79c1\u305f\u3061\u306e\u4e3b\u5f35\u3092\u8a3c\u660e\u3057\u3066\u3044\u307e\u3059\u3002\u6982\u5ff5\u3092\u6b63\u3057\u304f\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u30b3\u30e1\u30f3\u30c8\u3092\u8aad\u3093\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.java.string;\r\n\r\npublic class StringImmutabilityTest {\r\n\r\n\tpublic static void main(String[] args) {\r\n\r\n\t\tString s1 = \"Java\"; \/\/ \"Java\" String created in pool and reference assigned to s1\r\n\t\t\r\n\t\tString s2 = s1; \/\/s2 is also having the same reference to \"Java\" in the pool\r\n\t\t\r\n\t\tSystem.out.println(s1 == s2); \/\/ proof that s1 and s2 have same reference\r\n\t\t\r\n\t\ts1 = \"Python\"; \r\n\t\t\/\/s1 value got changed above, so how String is immutable?\r\n\t\t\r\n\t\t\/\/well, in above case a new String \"Python\" got created in the pool\r\n\t\t\/\/s1 is now referring to the new String in the pool \r\n\t\t\/\/BUT, the original String \"Java\" is still unchanged and remains in the pool\r\n\t\t\/\/s2 is still referring to the original String \"Java\" in the pool\r\n\t\t\r\n\t\t\/\/ proof that s1 and s2 have different reference\r\n\t\tSystem.out.println(s1 == s2); \r\n\t\t\r\n\t\tSystem.out.println(s2); \r\n\t\t\/\/ prints \"Java\" supporting the fact that original String value is unchanged, hence String is immutable\r\n\t\t\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<h3>\u6587\u5b57\u5217\u5185\u306e\u5358\u8a9e\u306e\u6570\u3092\u6570\u3048\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/h3>\n<p>\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5358\u7d14\u306a\u89e3\u6c7a\u7b56\u306f\u3001input.split(&#8221; &#8220;).length \u3067\u3059\u304c\u3001\u6587\u5b57\u5217\u304c\u9069\u5207\u306b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3055\u308c\u3066\u304a\u3089\u305a\u3001\u5148\u982d\u3084\u672b\u5c3e\u306b\u30b9\u30da\u30fc\u30b9\u304c\u542b\u307e\u308c\u3001\u91cd\u8907\u3057\u305f\u8907\u6570\u306e\u30b9\u30da\u30fc\u30b9\u3084\u30bf\u30d6\u304c\u3042\u308b\u5834\u5408\u306f\u6a5f\u80fd\u3057\u307e\u305b\u3093\u3002\u5e78\u3044\u306a\u3053\u3068\u306b\u3001String split() \u95a2\u6570\u306f\u6b63\u898f\u8868\u73fe\u3092\u5f15\u6570\u3068\u3057\u3066\u53d7\u3051\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u305f\u3081\u3001\u6587\u5b57\u5217\u5185\u306e\u5358\u8a9e\u306e\u6570\u3092\u6570\u3048\u308b\u305f\u3081\u306b\u305d\u308c\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.java.string;\r\n\r\npublic class CountNumberOfWordsInString {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\t\r\n\t\tcountNumberOfWords(\"My name is Pankaj\");\r\n\t\tcountNumberOfWords(\"I Love Java Programming\");\r\n\t\tcountNumberOfWords(\" This\tis  not   properly formatted\t\tline \");\r\n\r\n\t}\r\n\r\n\tprivate static void countNumberOfWords(String line) {\r\n\t\t\/\/System.out.println(line.split(\" \").length); \/\/won't work with tabs and multiple spaces\r\n\t\t\r\n\t\tString trimmedLine = line.trim();\r\n\t\tint count = trimmedLine.isEmpty() ? 0 : trimmedLine.split(\"\\\\s+\").length;\r\n\t\t\r\n\t\tSystem.out.println(count);\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<h3>\u540c\u3058\u6587\u5b57\u3067\u4f5c\u6210\u3055\u308c\u305f2\u3064\u306e\u6587\u5b57\u5217\u3092\u78ba\u8a8d\u3059\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u3044\u3066\u304f\u3060\u3055\u3044\u3002<\/h3>\n<p>\u6700\u521d\u306b\u3001\u5165\u529b\u3055\u308c\u305f\u6587\u5b57\u5217\u304b\u3089\u6587\u5b57\u306e\u30bb\u30c3\u30c8\u3092\u4f5c\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u30bb\u30c3\u30c8\u306eequals()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u305d\u308c\u3089\u304c\u540c\u3058\u6587\u5b57\u3092\u542b\u3093\u3067\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u4e8c\u3064\u306e\u6587\u5b57\u5217\u304c\u540c\u3058\u6587\u5b57\u3067\u4f5c\u6210\u3055\u308c\u305f\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306e\u7c21\u5358\u306a\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.java.string;\r\n\r\nimport java.util.Set;\r\nimport java.util.stream.Collectors;\r\n\r\npublic class CheckSameCharsInString {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tsameCharsStrings(\"abc\", \"cba\");\r\n\t\tsameCharsStrings(\"aabbcc\", \"abc\");\r\n\t\tsameCharsStrings(\"abcd\", \"abc\");\r\n\t\tsameCharsStrings(\"11\", \"1122\");\r\n\t\tsameCharsStrings(\"1122\", \"11\");\t\r\n\t}\r\n\r\n\tprivate static void sameCharsStrings(String s1, String s2) {\r\n\r\n\t\tSet&lt;Character&gt; set1 = s1.chars().mapToObj(c -&gt; (char) c).collect(Collectors.toSet());\r\n\t\tSet&lt;Character&gt; set2 = s2.chars().mapToObj(c -&gt; (char) c).collect(Collectors.toSet());\r\n\t\tSystem.out.println(set1.equals(set2));\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<h3>2\u3064\u306e\u6587\u5b57\u5217\u306e\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u3092\u8aad\u307f\u53d6\u308a\u3001\u6700\u521d\u306e\u6587\u5b57\u5217\u306b2\u756a\u76ee\u306e\u6587\u5b57\u5217\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u304b\uff1f<\/h3>\n<p>\u3053\u308c\u306f\u7c21\u5358\u306a\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u3001\u6307\u5b9a\u3057\u305f\u6587\u5b57\u5217\u304c\u3053\u306e\u6587\u5b57\u5217\u306e\u4e00\u90e8\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u3001String\u306econtains()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u5165\u529b\u3092\u8aad\u307f\u53d6\u308b\u305f\u3081\u306bScanner\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.java.string;\r\n\r\nimport java.util.Scanner;\r\n\r\npublic class StringContainsSubstring {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tScanner scanner = new Scanner(System.in);\r\n\t\tSystem.out.println(\"Enter First String:\");\r\n\t\tString s1 = scanner.nextLine();\r\n\t\t\r\n\t\tSystem.out.println(\"Enter Second String:\");\r\n\t\tString s2 = scanner.nextLine();\r\n\t\t\r\n\t\tscanner.close();\r\n\t\t\r\n\t\tboolean result = stringContainsSubstring(s1, s2);\r\n\t\tSystem.out.println(s1+\" contains \"+s2+\" = \"+result);\r\n\t}\r\n\r\n\tprivate static boolean stringContainsSubstring(String string, String substring) {\r\n\t\tboolean result = false;\r\n\t\tresult = string.contains(substring);\r\n\t\treturn result;\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30b5\u30f3\u30d7\u30eb\u51fa\u529b\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>Enter First String:\r\nPankaj\r\nEnter Second String:\r\nan\r\nPankaj contains an = true\r\n<\/code><\/pre>\n<h3>\u4e09\u3064\u76ee\u306e\u5909\u6570\u3092\u4f7f\u7528\u305b\u305a\u306b\u30012\u3064\u306e\u6587\u5b57\u5217\u3092\u4ea4\u63db\u3059\u308b\u65b9\u6cd5\u306f\u3042\u308a\u307e\u3059\u304b\uff1f<\/h3>\n<p>\u79c1\u305f\u3061\u306fString\u306esubstring()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u3053\u308c\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u3092\u793a\u3059\u305f\u3081\u306e\u7c21\u5358\u306a\u30b3\u30fc\u30c9\u30b9\u30cb\u30da\u30c3\u30c8\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>String s1 = \"abc\";\r\nString s2 = \"def\";\r\n\r\ns1 = s1.concat(s2);\r\ns2 = s1.substring(0,s1.length()-s2.length());\r\ns1 = s1.substring(s2.length());\r\n<\/code><\/pre>\n<p>\u3082\u3057\u79c1\u305f\u3061\u304c\u305d\u308c\u3092\u884c\u3046\u305f\u3081\u306e\u95a2\u6570\u3092\u66f8\u304b\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u5834\u5408\u306f\u3069\u3046\u3067\u3057\u3087\u3046\u304b\uff1f\u6587\u5b57\u5217\u306f\u4e0d\u5909\u306a\u306e\u3067\u3001\u30e1\u30bd\u30c3\u30c9\u5185\u306e\u6587\u5b57\u5217\u53c2\u7167\u306e\u5024\u306e\u5909\u66f4\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u304c\u7d42\u4e86\u3059\u308b\u3068\u3059\u3050\u306b\u6d88\u3048\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u307e\u305f\u3001Java\u3067\u306f\u30e1\u30bd\u30c3\u30c9\u304b\u3089\u8907\u6570\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u5165\u529b\u6587\u5b57\u5217\u3092\u4fdd\u6301\u3059\u308b\u305f\u3081\u306bContainer\u3092\u4f5c\u6210\u3057\u3001\u4e0a\u8a18\u306e\u30ed\u30b8\u30c3\u30af\u3092\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u306f\u3001\u3053\u308c\u304c\u3069\u306e\u3088\u3046\u306b\u884c\u308f\u308c\u308b\u304b\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u8907\u96d1\u306b\u898b\u3048\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u30ed\u30b8\u30c3\u30af\u306f\u4e0a\u8a18\u3068\u540c\u3058\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.java.string;\r\n\r\nimport java.util.Scanner;\r\n\r\npublic class SwapTwoStrings {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\t\r\n\t\tContainer container = new Container();\r\n\t\tScanner scanner = new Scanner(System.in);\r\n\t\tSystem.out.println(\"Enter First String:\");\r\n\t\tcontainer.setFirstString(scanner.nextLine());\r\n\t\t\r\n\t\tSystem.out.println(\"Enter Second String:\");\r\n\t\tcontainer.setSecondString(scanner.nextLine());\r\n\t\tscanner.close();\r\n\t\tSystem.out.println(container);\r\n\t\tcontainer = swapStrings(container);\r\n\t\tSystem.out.println(container);\r\n\t}\r\n\r\n\tprivate static Container swapStrings(Container container) {\r\n\t\tcontainer.setFirstString(container.getFirstString().concat(container.getSecondString())); \/\/s1 = s1+s2\r\n\t\tcontainer.setSecondString(container.getFirstString().substring(0, container.getFirstString().length()-container.getSecondString().length())); \/\/ s2=s1\r\n\t\tcontainer.setFirstString(container.getFirstString().substring(container.getSecondString().length()));\r\n\t\treturn container;\r\n\t}\r\n\r\n}\r\n\r\nclass Container{\r\n\tprivate String firstString;\r\n\tprivate String secondString;\r\n\t\r\n\tpublic String getFirstString() {\r\n\t\treturn firstString;\r\n\t}\r\n\tpublic void setFirstString(String firstString) {\r\n\t\tthis.firstString = firstString;\r\n\t}\r\n\tpublic String getSecondString() {\r\n\t\treturn secondString;\r\n\t}\r\n\tpublic void setSecondString(String secondString) {\r\n\t\tthis.secondString = secondString;\r\n\t}\r\n\t\r\n\t@Override\r\n\tpublic String toString() {\r\n\t\treturn \"First String = \"+firstString+\", Second String = \"+secondString;\r\n\t}\r\n}\r\n<\/code><\/pre>\n<p>\u30b5\u30f3\u30d7\u30eb\u306e\u51fa\u529b\uff1a<\/p>\n<pre class=\"post-pre\"><code>Enter First String:\r\nJava\r\nEnter Second String:\r\nPython\r\nFirst String = Java, Second String = Python\r\nFirst String = Python, Second String = Java\r\n<\/code><\/pre>\n<h3>\u5165\u529b\u3055\u308c\u305f\u6587\u5b57\u5217\u304b\u3089\u6700\u521d\u306e\u975e\u7e70\u308a\u8fd4\u3057\u6587\u5b57\u3092\u898b\u3064\u3051\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/h3>\n<pre class=\"post-pre\"><code>package com.scdev.java.string;\r\n\r\nimport java.util.ArrayList;\r\nimport java.util.List;\r\n\r\npublic class FindNonRepeatingChar {\r\n\r\n\tpublic static void main(String[] args) {\r\n\r\n\t\tSystem.out.println(printFirstNonRepeatingChar(\"abcaabcdedxy\"));\r\n\t\tSystem.out.println(printFirstNonRepeatingChar(\"abca\"));\r\n\t\tSystem.out.println(printFirstNonRepeatingChar(\"aaa\"));\r\n\r\n\t}\r\n\r\n\tprivate static Character printFirstNonRepeatingChar(String string) {\r\n\t\tchar[] chars = string.toCharArray();\r\n\r\n\t\tList&lt;Character&gt; discardedChars = new ArrayList&lt;&gt;();\r\n\r\n\t\tfor (int i = 0; i &lt; chars.length; i++) {\r\n\t\t\tchar c = chars[i];\r\n\r\n\t\t\tif (discardedChars.contains(c))\r\n\t\t\t\tcontinue;\r\n\r\n\t\t\tfor (int j = i + 1; j &lt; chars.length; j++) {\r\n\t\t\t\tif (c == chars[j]) { \/\/ match found\r\n\t\t\t\t\tdiscardedChars.add(c);\r\n\t\t\t\t\tbreak;\r\n\t\t\t\t} else if (j == chars.length - 1) { \/\/ no match found till end\r\n\t\t\t\t\treturn c;\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t}\r\n\t\treturn null;\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<h3>\u6587\u5b57\u5217\u304c\u6570\u5b57\u3060\u3051\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u308b\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u65b9\u6cd5\u306f2\u3064\u3042\u308a\u307e\u3059\u304b\uff1f<\/h3>\n<p>\u6587\u5b57\u5217\u304c\u6570\u5024\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u3001\u6b63\u898f\u8868\u73fe\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5225\u306e\u65b9\u6cd5\u306f\u3001\u305d\u308c\u3092Long\u578b\u306b\u30d1\u30fc\u30b9\u3057\u3001\u3082\u3057\u975e\u6570\u5024\u306e\u6587\u5b57\u5217\u306a\u3089\u3070NumberFormatException\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.java.string;\r\n\r\npublic class CheckIfStringContainsDigitsOnly {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tdigitsOnlyString(\"111\");\r\n\t\tdigitsOnlyString(\"111a 1\");\r\n\t\tdigitsOnlyString(\"111 222\");\r\n\t\tdigitsOnlyString(\"111L\");\r\n\r\n\t}\r\n\r\n\tprivate static void digitsOnlyString(String string) {\r\n\t\tif(string.matches(\"\\\\d+\")) System.out.println(\"Digit Only String ::\"+string);\r\n\t\t\r\n\t\ttry {\r\n\t\t\tlong l = Long.parseLong(string);\r\n\t\t\tSystem.out.println(\"Digit Only String ::\"+string);\r\n\t\t}catch(Exception e){\r\n\t\t\tSystem.out.println(\"Non Digit Only String ::\"+string);\r\n\t\t}\r\n\t\t\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<h3>\u6587\u5b57\u5217\u306e\u30c7\u30a3\u30fc\u30d7\u30b3\u30d4\u30fc\u306e\u65b9\u6cd5\u306f\uff1f<\/h3>\n<p>\u6587\u5b57\u5217\u306f\u4e0d\u5909\u306a\u306e\u3067\u3001\u30c7\u30a3\u30fc\u30d7\u30b3\u30d4\u30fc\u307e\u305f\u306f\u30b7\u30e3\u30ed\u30fc\u30b3\u30d4\u30fc\u3092\u5fc3\u914d\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u5358\u7d14\u306b\u4ee3\u5165\u6f14\u7b97\u5b50\uff08=\uff09\u3092\u4f7f\u7528\u3057\u3066\u3001\u4e00\u3064\u306e\u6587\u5b57\u5217\u3092\u5225\u306e\u6587\u5b57\u5217\u306b\u30b3\u30d4\u30fc\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u8a73\u7d30\u306f\u300cJava String copy\u300d\u3092\u8aad\u3093\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u79c1\u306eGitHub\u306e\u30ea\u30dd\u30b8\u30c8\u30ea\u304b\u3089\u3001\u4f8b\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u65e5\u672c\u8a9e\u3067\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u8a00\u3044\u63db\u3048\u3089\u308c\u307e\u3059\uff1a\u300cString\u30af\u30e9\u30b9\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u6700\u3082\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b\u30af\u30e9\u30b9\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001Java\u306e\u9762\u63a5\u3067\u306fString\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f7f\u7528\u3057\u3066\u3001\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u30b9\u30ad\u30eb\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u300d  [&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-343","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) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0\" \/>\n<meta property=\"og:description\" content=\"Java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-09-10T08:57:37+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-07-31T13:49:52+00:00\" \/>\n<meta name=\"author\" content=\"\u685c, \u6625\u6a39\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u685c, \u6625\u6a39\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"25\u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%87%e5%ad%97%e5%88%97%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0\/\",\"url\":\"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%87%e5%ad%97%e5%88%97%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0\/\",\"name\":\"Java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0 - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/#website\"},\"datePublished\":\"2023-09-10T08:57:37+00:00\",\"dateModified\":\"2025-07-31T13:49:52+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/#\/schema\/person\/ff22288af1a5455571aff7586b0fb341\"},\"description\":\"Java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%87%e5%ad%97%e5%88%97%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0\/#breadcrumb\"},\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%87%e5%ad%97%e5%88%97%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%87%e5%ad%97%e5%88%97%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.silicloud.com\/ja\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/ja\/blog\/\",\"name\":\"Blog - Silicon Cloud\",\"description\":\"\",\"inLanguage\":\"ja\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/#\/schema\/person\/ff22288af1a5455571aff7586b0fb341\",\"name\":\"\u685c, \u6625\u6a39\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/cee48863f3d4fd7fef222498f3e71b82312aee42b7257a2dbde56394ca4e19de?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/cee48863f3d4fd7fef222498f3e71b82312aee42b7257a2dbde56394ca4e19de?s=96&d=mm&r=g\",\"caption\":\"\u685c, \u6625\u6a39\"},\"url\":\"https:\/\/www.silicloud.com\/ja\/blog\/author\/sakuraharuki\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%87%e5%ad%97%e5%88%97%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0\/#local-main-organization-logo\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Blog - Silicon Cloud\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0 - Blog - Silicon Cloud","description":"Java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/ja\/blog\/java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0\/","og_locale":"ja_JP","og_type":"article","og_title":"Java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0","og_description":"Java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002","og_url":"https:\/\/www.silicloud.com\/ja\/blog\/java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2023-09-10T08:57:37+00:00","article_modified_time":"2025-07-31T13:49:52+00:00","author":"\u685c, \u6625\u6a39","twitter_card":"summary_large_image","twitter_misc":{"\u57f7\u7b46\u8005":"\u685c, \u6625\u6a39","\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593":"25\u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%87%e5%ad%97%e5%88%97%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0\/","url":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%87%e5%ad%97%e5%88%97%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0\/","name":"Java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0 - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/ja\/blog\/#website"},"datePublished":"2023-09-10T08:57:37+00:00","dateModified":"2025-07-31T13:49:52+00:00","author":{"@id":"https:\/\/www.silicloud.com\/ja\/blog\/#\/schema\/person\/ff22288af1a5455571aff7586b0fb341"},"description":"Java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%87%e5%ad%97%e5%88%97%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0\/#breadcrumb"},"inLanguage":"ja","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%87%e5%ad%97%e5%88%97%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%87%e5%ad%97%e5%88%97%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.silicloud.com\/ja\/blog\/"},{"@type":"ListItem","position":2,"name":"Java\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d7\u30ed\u30b0\u30e9\u30e0"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/ja\/blog\/#website","url":"https:\/\/www.silicloud.com\/ja\/blog\/","name":"Blog - Silicon Cloud","description":"","inLanguage":"ja"},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/ja\/blog\/#\/schema\/person\/ff22288af1a5455571aff7586b0fb341","name":"\u685c, \u6625\u6a39","image":{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/www.silicloud.com\/ja\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/cee48863f3d4fd7fef222498f3e71b82312aee42b7257a2dbde56394ca4e19de?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/cee48863f3d4fd7fef222498f3e71b82312aee42b7257a2dbde56394ca4e19de?s=96&d=mm&r=g","caption":"\u685c, \u6625\u6a39"},"url":"https:\/\/www.silicloud.com\/ja\/blog\/author\/sakuraharuki\/"},{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%87%e5%ad%97%e5%88%97%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0\/#local-main-organization-logo","url":"","contentUrl":"","caption":"Blog - Silicon Cloud"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/ja\/blog\/wp-json\/wp\/v2\/posts\/343","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/ja\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/ja\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/ja\/blog\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/ja\/blog\/wp-json\/wp\/v2\/comments?post=343"}],"version-history":[{"count":1,"href":"https:\/\/www.silicloud.com\/ja\/blog\/wp-json\/wp\/v2\/posts\/343\/revisions"}],"predecessor-version":[{"id":39387,"href":"https:\/\/www.silicloud.com\/ja\/blog\/wp-json\/wp\/v2\/posts\/343\/revisions\/39387"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/ja\/blog\/wp-json\/wp\/v2\/media?parent=343"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/ja\/blog\/wp-json\/wp\/v2\/categories?post=343"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/ja\/blog\/wp-json\/wp\/v2\/tags?post=343"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}