{"id":733,"date":"2022-12-28T15:52:46","date_gmt":"2022-12-12T02:29:14","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/java%e3%82%bd%e3%82%b1%e3%83%83%e3%83%88%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%9f%e3%83%b3%e3%82%b0%e3%81%ae%e3%82%bd%e3%82%b1%e3%83%83%e3%83%88%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc%e3%81%a8\/"},"modified":"2025-08-01T02:01:47","modified_gmt":"2025-07-31T17:01:47","slug":"java%e3%82%bd%e3%82%b1%e3%83%83%e3%83%88%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%9f%e3%83%b3%e3%82%b0%e3%81%ae%e3%82%bd%e3%82%b1%e3%83%83%e3%83%88%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc%e3%81%a8","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%82%bd%e3%82%b1%e3%83%83%e3%83%88%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%9f%e3%83%b3%e3%82%b0%e3%81%ae%e3%82%bd%e3%82%b1%e3%83%83%e3%83%88%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc%e3%81%a8\/","title":{"rendered":"Java\u30bd\u30b1\u30c3\u30c8\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u30bd\u30b1\u30c3\u30c8\u30b5\u30fc\u30d0\u30fc\u3068\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u4f8b"},"content":{"rendered":"<p>Java\u306e\u30bd\u30b1\u30c3\u30c8\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u4f8b\u3078\u3088\u3046\u3053\u305d\u3002\u3059\u3079\u3066\u306e\u30b5\u30fc\u30d0\u30fc\u306f\u7279\u5b9a\u306e\u30b7\u30b9\u30c6\u30e0\u4e0a\u3067\u5b9f\u884c\u3055\u308c\u3001\u7279\u5b9a\u306e\u30dd\u30fc\u30c8\u3067\u30ea\u30c3\u30b9\u30f3\u3057\u307e\u3059\u3002\u30bd\u30b1\u30c3\u30c8\u306f\u30dd\u30fc\u30c8\u756a\u53f7\u306b\u30d0\u30a4\u30f3\u30c9\u3055\u308c\u3001\u30b5\u30fc\u30d0\u30fc\u3092\u5b9f\u884c\u3059\u308b\u3068\u30bd\u30b1\u30c3\u30c8\u304c\u30ea\u30c3\u30b9\u30f3\u3057\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5f85\u6a5f\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30dd\u30fc\u30c88080\u3067\u5b9f\u884c\u3055\u308c\u308bTomcat\u30b5\u30fc\u30d0\u30fc\u306f\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5f85\u3061\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u53d7\u3051\u53d6\u308b\u3068\u5fdc\u7b54\u3057\u307e\u3059\u3002<\/p>\n<h2>Java\u306e\u30bd\u30b1\u30c3\u30c8\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/h2>\n<p>\u30bd\u30b1\u30c3\u30c8\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b2\u3064\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u9593\u306e\u53cc\u65b9\u5411\u901a\u4fe1\u30ea\u30f3\u30af\u306e1\u3064\u306e\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002\u30bd\u30b1\u30c3\u30c8\u306f\u30dd\u30fc\u30c8\u756a\u53f7\u306b\u30d0\u30a4\u30f3\u30c9\u3055\u308c\u3066\u304a\u308a\u3001TCP\u30ec\u30a4\u30e4\u30fc\u304c\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\u5148\u3068\u306a\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u8b58\u5225\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Java\u30bd\u30b1\u30c3\u30c8\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u4f8b\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001Java\u30bd\u30b1\u30c3\u30c8\u30b5\u30fc\u30d0\u30fc\u304a\u3088\u3073Java\u30bd\u30b1\u30c3\u30c8\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4f5c\u6210\u65b9\u6cd5\u3092\u5b66\u3073\u307e\u3059\u3002\u307e\u305f\u3001\u30b5\u30fc\u30d0\u30fc\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u30bd\u30b1\u30c3\u30c8\u4e0a\u3067\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u66f8\u304d\u3092\u3059\u308b\u65b9\u6cd5\u3082\u5b66\u3073\u307e\u3059\u3002java.net.Socket\u304a\u3088\u3073java.net.ServerSocket\u306f\u3001Socket\u3068Socket\u30b5\u30fc\u30d0\u30fc\u3092\u5b9f\u88c5\u3057\u305fJava\u306e\u30af\u30e9\u30b9\u3067\u3059\u3002<\/p>\n<h3>Java\u306e\u30bd\u30b1\u30c3\u30c8\u30b5\u30fc\u30d0\u30fc\u306e\u4f8b<\/h3>\n<pre class=\"post-pre\"><code>package com.scdev.socket;\r\n\r\nimport java.io.IOException;\r\nimport java.io.ObjectInputStream;\r\nimport java.io.ObjectOutputStream;\r\nimport java.lang.ClassNotFoundException;\r\nimport java.net.ServerSocket;\r\nimport java.net.Socket;\r\n\r\n\/**\r\n * This class implements java Socket server\r\n * @author scdev\r\n *\r\n *\/\r\npublic class SocketServerExample {\r\n    \r\n    \/\/static ServerSocket variable\r\n    private static ServerSocket server;\r\n    \/\/socket server port on which it will listen\r\n    private static int port = 9876;\r\n    \r\n    public static void main(String args[]) throws IOException, ClassNotFoundException{\r\n        \/\/create the socket server object\r\n        server = new ServerSocket(port);\r\n        \/\/keep listens indefinitely until receives 'exit' call or program terminates\r\n        while(true){\r\n            System.out.println(\"Waiting for the client request\");\r\n            \/\/creating socket and waiting for client connection\r\n            Socket socket = server.accept();\r\n            \/\/read from socket to ObjectInputStream object\r\n            ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());\r\n            \/\/convert ObjectInputStream object to String\r\n            String message = (String) ois.readObject();\r\n            System.out.println(\"Message Received: \" + message);\r\n            \/\/create ObjectOutputStream object\r\n            ObjectOutputStream oos = new ObjectOutputStream(socket.getOutputStream());\r\n            \/\/write object to Socket\r\n            oos.writeObject(\"Hi Client \"+message);\r\n            \/\/close resources\r\n            ois.close();\r\n            oos.close();\r\n            socket.close();\r\n            \/\/terminate the server if client sends exit request\r\n            if(message.equalsIgnoreCase(\"exit\")) break;\r\n        }\r\n        System.out.println(\"Shutting down Socket server!!\");\r\n        \/\/close the ServerSocket object\r\n        server.close();\r\n    }\r\n    \r\n}\r\n<\/code><\/pre>\n<h3>Java\u306e\u30bd\u30b1\u30c3\u30c8\u30af\u30e9\u30a4\u30a2\u30f3\u30c8<\/h3>\n<pre class=\"post-pre\"><code>package com.scdev.socket;\r\n\r\nimport java.io.IOException;\r\nimport java.io.ObjectInputStream;\r\nimport java.io.ObjectOutputStream;\r\nimport java.net.InetAddress;\r\nimport java.net.Socket;\r\nimport java.net.UnknownHostException;\r\n\r\n\/**\r\n * This class implements java socket client\r\n * @author scdev\r\n *\r\n *\/\r\npublic class SocketClientExample {\r\n\r\n    public static void main(String[] args) throws UnknownHostException, IOException, ClassNotFoundException, InterruptedException{\r\n        \/\/get the localhost IP address, if server is running on some other IP, you need to use that\r\n        InetAddress host = InetAddress.getLocalHost();\r\n        Socket socket = null;\r\n        ObjectOutputStream oos = null;\r\n        ObjectInputStream ois = null;\r\n        for(int i=0; i&lt;5;i++){\r\n            \/\/establish socket connection to server\r\n            socket = new Socket(host.getHostName(), 9876);\r\n            \/\/write to socket using ObjectOutputStream\r\n            oos = new ObjectOutputStream(socket.getOutputStream());\r\n            System.out.println(\"Sending request to Socket Server\");\r\n            if(i==4)oos.writeObject(\"exit\");\r\n            else oos.writeObject(\"\"+i);\r\n            \/\/read the server response message\r\n            ois = new ObjectInputStream(socket.getInputStream());\r\n            String message = (String) ois.readObject();\r\n            System.out.println(\"Message: \" + message);\r\n            \/\/close resources\r\n            ois.close();\r\n            oos.close();\r\n            Thread.sleep(100);\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u30b5\u30fc\u30d0\u30fc-\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u901a\u4fe1\u306e\u305f\u3081\u306b\u3001\u307e\u305aSocketServerExample\u30af\u30e9\u30b9\u3092\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30bd\u30b1\u30c3\u30c8\u30b5\u30fc\u30d0\u30fc\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u5358\u306b\u300c\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5f85\u3063\u3066\u3044\u307e\u3059\u300d\u3068\u8868\u793a\u3055\u308c\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5f85\u3061\u307e\u3059\u3002\u305d\u3057\u3066\u3001SocketClientExample\u30af\u30e9\u30b9\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001Java\u30bd\u30b1\u30c3\u30c8\u30b5\u30fc\u30d0\u30fc\u306b\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3057\u3001\u30ec\u30b9\u30dd\u30f3\u30b9\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u8868\u793a\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001Java\u30bd\u30b1\u30c3\u30c8\u30b5\u30fc\u30d0\u30fcSocketServerExample\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u51fa\u529b\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>Waiting for the client request\r\nMessage Received: 0\r\nWaiting for the client request\r\nMessage Received: 1\r\nWaiting for the client request\r\nMessage Received: 2\r\nWaiting for the client request\r\nMessage Received: 3\r\nWaiting for the client request\r\nMessage Received: exit\r\nShutting down Socket server!!\r\n<\/code><\/pre>\n<p>Java\u306e\u30bd\u30b1\u30c3\u30c8\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30d7\u30ed\u30b0\u30e9\u30e0\u3001SocketClientExample\u306e\u51fa\u529b\u7d50\u679c\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>Sending request to Socket Server\r\nMessage: Hi Client 0\r\nSending request to Socket Server\r\nMessage: Hi Client 1\r\nSending request to Socket Server\r\nMessage: Hi Client 2\r\nSending request to Socket Server\r\nMessage: Hi Client 3\r\nSending request to Socket Server\r\nMessage: Hi Client exit\r\n<\/code><\/pre>\n<p>\u3053\u308c\u3067Java\u306b\u304a\u3051\u308b\u30bd\u30b1\u30c3\u30c8\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u7c21\u5358\u306a\u307e\u3068\u3081\u306f\u7d42\u308f\u308a\u3067\u3059\u3002Java\u306e\u30bd\u30b1\u30c3\u30c8\u30b5\u30fc\u30d0\u30fc\u3068\u30bd\u30b1\u30c3\u30c8\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u59cb\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3068\u826f\u3044\u3067\u3059\u306d\u3002\u53c2\u8003\uff1aOracle\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u306e\u30bd\u30b1\u30c3\u30c8\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u4f8b\u3078\u3088\u3046\u3053\u305d\u3002\u3059\u3079\u3066\u306e\u30b5\u30fc\u30d0\u30fc\u306f\u7279\u5b9a\u306e\u30b7\u30b9\u30c6\u30e0\u4e0a\u3067\u5b9f\u884c\u3055\u308c\u3001\u7279\u5b9a\u306e\u30dd\u30fc\u30c8\u3067\u30ea\u30c3\u30b9\u30f3\u3057\u307e\u3059\u3002\u30bd\u30b1\u30c3\u30c8\u306f\u30dd\u30fc\u30c8\u756a\u53f7\u306b\u30d0\u30a4\u30f3\u30c9\u3055\u308c\u3001\u30b5\u30fc\u30d0\u30fc\u3092\u5b9f\u884c\u3059\u308b\u3068\u30bd\u30b1\u30c3\u30c8\u304c\u30ea\u30c3\u30b9\u30f3\u3057\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u30ea\u30af [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-733","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\u30bd\u30b1\u30c3\u30c8\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u30bd\u30b1\u30c3\u30c8\u30b5\u30fc\u30d0\u30fc\u3068\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u4f8b - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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