{"id":33711,"date":"2023-02-12T19:34:44","date_gmt":"2023-02-12T14:04:44","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-count-the-number-of-characters-in-a-line-in-a-csv-file\/"},"modified":"2023-02-12T19:34:44","modified_gmt":"2023-02-12T14:04:44","slug":"solved-how-to-count-the-number-of-characters-in-a-line-in-a-csv-file","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-count-the-number-of-characters-in-a-line-in-a-csv-file\/","title":{"rendered":"[Solved] How to count the number of characters in a line in a csv file"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-30787744\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"30787744\" data-parentid=\"30782590\" 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>I suggest you to read the javadoc of <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/docs.oracle.com\/javase\/6\/docs\/api\/java\/lang\/String.html#split(java.lang.String)\">String.split<\/a>. I think that you misunderstood the concept when you did this:<\/p>\n<blockquote>\n<p>String[] f=line.split(&#8220;,&#8221;);<\/p>\n<p>a[count]=Integer.parseInt(f[2]);  \/\/&#8211;&gt; java.lang.NumberFormatException here!<\/p>\n<\/blockquote>\n<p>Avoid using &#8216;magic&#8217; numbers in your code like <code>int[] a = new int[24];<\/code>. Why 24?<\/p>\n<p>Well, here comes a version that do what you want to do. Maybe it isn&#8217;t the best way to do this but it works.<\/p>\n<pre><code>public void convertCSVToFlat () throws Exception {\n    String csv=\"Justice_League.csv\";\n    BufferedReader bReader = new BufferedReader(new FileReader(csv));\n    \n    \/\/We're storing the values at this 3 arraylists, \n    \/\/but a better approach is using an object to hold'em\n    ArrayList&lt;String&gt; lines = new ArrayList&lt;String&gt;();\n    ArrayList&lt;Integer&gt; chars = new ArrayList&lt;Integer&gt;();\n    ArrayList&lt;String&gt; hex = new ArrayList&lt;String&gt;();\n    \n    String line = \"\";\n    try {\n        while((line = bReader.readLine()) != null) {\n            lines.add(line);\n            \/\/I'm assuming that you don't want to count the commas and spaces.\n            \/\/If you want to, comment the next line\n            line = line.replaceAll(\",\", \"\").replaceAll(\" \", \"\");\n            int c = line.length(); \/\/count remaining chars...\n            chars.add(c);\n            hex.add(Integer.toHexString(c));\n        }\n    } catch (IOException e) {\n        e.printStackTrace();\n    }\n    bReader.close();\n    \n    \/\/Just to show the results\n    for (int i = 0; i &lt; lines.size(); i++) {\n        System.out.print(lines.get(i));\n        System.out.print(\"\\t\" + chars.get(i));\n        System.out.println(\"\\t\" + hex.get(i));\n    }\n}\n<\/code><\/pre>\n<p>Like I said previously, this is a way to solve this. You should try another options to solve this in order to improve your knowledge&#8230;<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">1<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved How to count the number of characters in a line in a csv file <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] I suggest you to read the javadoc of String.split. I think that you misunderstood the concept when you did this: String[] f=line.split(&#8220;,&#8221;); a[count]=Integer.parseInt(f[2]); \/\/&#8211;&gt; java.lang.NumberFormatException here! Avoid using &#8216;magic&#8217; numbers in your code like int[] a = new int[24];. Why 24? Well, here comes a version that do what you want to do. Maybe &#8230; <a title=\"[Solved] How to count the number of characters in a line in a csv file\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-count-the-number-of-characters-in-a-line-in-a-csv-file\/\" aria-label=\"More on [Solved] How to count the number of characters in a line in a csv 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":[5322,483,633,323],"class_list":["post-33711","post","type-post","status-publish","format-standard","hentry","category-solved","tag-converters","tag-csv","tag-hex","tag-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>[Solved] How to count the number of characters in a line in a csv 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-how-to-count-the-number-of-characters-in-a-line-in-a-csv-file\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] How to count the number of characters in a line in a csv file - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] I suggest you to read the javadoc of String.split. 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