{"id":4083,"date":"2022-08-21T10:34:44","date_gmt":"2022-08-21T05:04:44","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-java-variable-not-initialized\/"},"modified":"2022-08-21T10:34:44","modified_gmt":"2022-08-21T05:04:44","slug":"solved-java-variable-not-initialized","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-java-variable-not-initialized\/","title":{"rendered":"[Solved] java variable not initialized"},"content":{"rendered":"

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For your interest, this is how I would write it.<\/p>\n

static final Map<String, Double> gradeToPointMap =\n        new LinkedHashMap<String, Double>() {{\n            put(\"A+\", 4.0);\n            put(\"A\", 4.0);\n            put(\"A-\", 3.67);\n            put(\"B+\", 3.33);\n            put(\"B\", 3.0);\n            put(\"B-\", 2.67);\n            put(\"C+\", 2.33);\n            put(\"C\", 2.0);\n            put(\"F\", 0.0);\n        }};\n\npublic static void main(String... args) {\n    Scanner keyboard = new Scanner(System.in);\n\n    System.out.println(\"Enter a letter grade as one of \" + gradeToPointMap.keySet());\n    String letterGrade = keyboard.next();\n\n    Double gradePoints = gradeToPointMap.get(letterGrade.toUpperCase());\n    if (gradePoints == null)\n        System.out.println(\"Unknown letter grade \" + letterGrade);\n    else\n        System.out.println(\"Your grade point(GPA) is \" + gradePoints);\n}\n<\/code><\/pre>\n
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it gives me an error says that variable gradePoints might not have been initialized, what am i missing here..?<\/p>\n<\/blockquote>\n
{\n    System.out.println(\"Error, you did not enter the correct information\");\n    \/\/ gradePoints is not set to anything here\n}\n<\/code><\/pre>\n
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also how can i improve the code so that it accept letters a+ as A+ and any other input throw an error?<\/p>\n<\/blockquote>\n
Don’t use ==<\/code> for String instead you want to use .equals()<\/code><\/p>\n
Except in your case you want .equalsIgnoreCase<\/code><\/p>\n<\/p><\/div>\n
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            6<\/span> <\/p><\/div>\n<\/div>\n
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solved java variable not initialized <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] For your interest, this is how I would write it. static final Map<String, Double> gradeToPointMap = new LinkedHashMap<String, Double>() {{ put(“A+”, 4.0); put(“A”, 4.0); put(“A-“, 3.67); put(“B+”, 3.33); put(“B”, 3.0); put(“B-“, 2.67); put(“C+”, 2.33); put(“C”, 2.0); put(“F”, 0.0); }}; public static void main(String… args) { Scanner keyboard = new Scanner(System.in); System.out.println(“Enter a letter grade … 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":[323],"class_list":["post-4083","post","type-post","status-publish","format-standard","hentry","category-solved","tag-java"],"yoast_head":"\n[Solved] java variable not initialized - 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-java-variable-not-initialized\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] java variable not initialized - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] For your interest, this is how I would write it. static final Map<String, Double> gradeToPointMap = new LinkedHashMap<String, Double>() {{ put("A+", 4.0); put("A", 4.0); put("A-", 3.67); put("B+", 3.33); put("B", 3.0); put("B-", 2.67); put("C+", 2.33); put("C", 2.0); put("F", 0.0); }}; public static void main(String... args) { Scanner keyboard = new Scanner(System.in); System.out.println("Enter a letter grade ... 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put(\"A\", 4.0); put(\"A-\", 3.67); put(\"B+\", 3.33); put(\"B\", 3.0); put(\"B-\", 2.67); put(\"C+\", 2.33); put(\"C\", 2.0); put(\"F\", 0.0); }}; public static void main(String... args) { Scanner keyboard = new Scanner(System.in); System.out.println(\"Enter a letter grade ... Read more","og_url":"https:\/\/jassweb.com\/solved\/solved-java-variable-not-initialized\/","og_site_name":"JassWeb","article_published_time":"2022-08-21T05:04:44+00:00","author":"Kirat","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Kirat","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/jassweb.com\/solved\/solved-java-variable-not-initialized\/#article","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/solved-java-variable-not-initialized\/"},"author":{"name":"Kirat","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31"},"headline":"[Solved] java variable not initialized","datePublished":"2022-08-21T05:04:44+00:00","mainEntityOfPage":{"@id":"https:\/\/jassweb.com\/solved\/solved-java-variable-not-initialized\/"},"wordCount":79,"publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"keywords":["java"],"articleSection":["Solved"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/jassweb.com\/solved\/solved-java-variable-not-initialized\/","url":"https:\/\/jassweb.com\/solved\/solved-java-variable-not-initialized\/","name":"[Solved] java variable not initialized - JassWeb","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/#website"},"datePublished":"2022-08-21T05:04:44+00:00","breadcrumb":{"@id":"https:\/\/jassweb.com\/solved\/solved-java-variable-not-initialized\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/jassweb.com\/solved\/solved-java-variable-not-initialized\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/jassweb.com\/solved\/solved-java-variable-not-initialized\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/jassweb.com\/solved\/"},{"@type":"ListItem","position":2,"name":"[Solved] java variable not initialized"}]},{"@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\/"}]}},"_links":{"self":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/4083","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/comments?post=4083"}],"version-history":[{"count":0,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/4083\/revisions"}],"wp:attachment":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/media?parent=4083"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/categories?post=4083"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/tags?post=4083"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}