{"id":21260,"date":"2022-11-12T19:09:20","date_gmt":"2022-11-12T13:39:20","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-search-student-in-file\/"},"modified":"2022-11-12T19:09:20","modified_gmt":"2022-11-12T13:39:20","slug":"solved-search-student-in-file","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-search-student-in-file\/","title":{"rendered":"[Solved] Search Student in File"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-25771912\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"25771912\" data-parentid=\"25771841\" data-score=\"1\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>You are reading lines from the file and assigning its content to <code>str<\/code>, but you never do something with this value.<\/p>\n<p>Also, <code>Student<\/code> seems to be empty.<\/p>\n<p>Supposing your file includes only the ID of the student:<\/p>\n<pre><code>BufferedReader read = new BufferedReader(new FileReader(file));\n    String str;\n     while((str=read.readLine())!=null)\n     {\n        \/\/ Your constructor assigns str to ID property of Student\n        \/\/ Casting to Integer, because ID is a number\n        Student s = new Student(Integer.valueOf(str)); \n\n        if(s.getId()==id)\n            System.out.println(s.print());\n     }\n<\/code><\/pre>\n<p>Also, make sure your <code>print()<\/code> method in Student really prints what you want.<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\"><\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Search Student in File <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] You are reading lines from the file and assigning its content to str, but you never do something with this value. Also, Student seems to be empty. Supposing your file includes only the ID of the student: BufferedReader read = new BufferedReader(new FileReader(file)); String str; while((str=read.readLine())!=null) { \/\/ Your constructor assigns str to ID &#8230; <a title=\"[Solved] Search Student in File\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-search-student-in-file\/\" aria-label=\"More on [Solved] Search Student in File\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[1315,575,323],"class_list":["post-21260","post","type-post","status-publish","format-standard","hentry","category-solved","tag-api","tag-file-io","tag-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Search Student in File - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-search-student-in-file\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Search Student in File - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] You are reading lines from the file and assigning its content to str, but you never do something with this value. Also, Student seems to be empty. Supposing your file includes only the ID of the student: BufferedReader read = new BufferedReader(new FileReader(file)); String str; while((str=read.readLine())!=null) { \/\/ Your constructor assigns str to ID ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jassweb.com\/solved\/solved-search-student-in-file\/\" \/>\n<meta property=\"og:site_name\" content=\"JassWeb\" \/>\n<meta property=\"article:published_time\" content=\"2022-11-12T13:39:20+00:00\" \/>\n<meta name=\"author\" content=\"Kirat\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kirat\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-search-student-in-file\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-search-student-in-file\/\"},\"author\":{\"name\":\"Kirat\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\"},\"headline\":\"[Solved] Search Student in File\",\"datePublished\":\"2022-11-12T13:39:20+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-search-student-in-file\/\"},\"wordCount\":59,\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"keywords\":[\"api\",\"file-io\",\"java\"],\"articleSection\":[\"Solved\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-search-student-in-file\/\",\"url\":\"https:\/\/jassweb.com\/solved\/solved-search-student-in-file\/\",\"name\":\"[Solved] Search Student in File - JassWeb\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#website\"},\"datePublished\":\"2022-11-12T13:39:20+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-search-student-in-file\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/jassweb.com\/solved\/solved-search-student-in-file\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-search-student-in-file\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/jassweb.com\/solved\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"[Solved] Search Student in File\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/jassweb.com\/solved\/#website\",\"url\":\"https:\/\/jassweb.com\/solved\/\",\"name\":\"JassWeb\",\"description\":\"Build High-quality Websites\",\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/jassweb.com\/solved\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\",\"name\":\"Jass Web\",\"url\":\"https:\/\/jassweb.com\/solved\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png\",\"contentUrl\":\"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png\",\"width\":693,\"height\":132,\"caption\":\"Jass Web\"},\"image\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\",\"name\":\"Kirat\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1775798750\",\"contentUrl\":\"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1775798750\",\"caption\":\"Kirat\"},\"sameAs\":[\"http:\/\/jassweb.com\"],\"url\":\"https:\/\/jassweb.com\/solved\/author\/jaspritsinghghumangmail-com\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"[Solved] Search Student in File - JassWeb","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:\/\/jassweb.com\/solved\/solved-search-student-in-file\/","og_locale":"en_US","og_type":"article","og_title":"[Solved] Search Student in File - JassWeb","og_description":"[ad_1] You are reading lines from the file and assigning its content to str, but you never do something with this value. 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