{"id":27080,"date":"2024-03-16T07:50:41","date_gmt":"2024-03-16T07:50:41","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-write-java-code-to-get-the-number-of-lines-in-a-file\/"},"modified":"2024-03-22T10:09:25","modified_gmt":"2024-03-22T10:09:25","slug":"how-to-write-java-code-to-get-the-number-of-lines-in-a-file","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-write-java-code-to-get-the-number-of-lines-in-a-file\/","title":{"rendered":"How to write Java code to get the number of lines in a file?"},"content":{"rendered":"<p>You can use the LineNumberReader class to retrieve the number of lines in a file.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.io.FileReader;\r\n<span class=\"hljs-keyword\">import<\/span> java.io.LineNumberReader;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">LineCount<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">(String[] args)<\/span> {\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">fileName<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"path\/to\/file.txt\"<\/span>;\r\n        <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">lineCount<\/span> <span class=\"hljs-operator\">=<\/span> countLines(fileName);\r\n        System.out.println(<span class=\"hljs-string\">\"Total number of lines: \"<\/span> + lineCount);\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">countLines<\/span><span class=\"hljs-params\">(String fileName)<\/span> {\r\n        <span class=\"hljs-keyword\">try<\/span> (<span class=\"hljs-type\">LineNumberReader<\/span> <span class=\"hljs-variable\">reader<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">LineNumberReader<\/span>(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">FileReader<\/span>(fileName))) {\r\n            <span class=\"hljs-keyword\">while<\/span> (reader.skip(Long.MAX_VALUE) &gt; <span class=\"hljs-number\">0<\/span>) {\r\n                <span class=\"hljs-comment\">\/\/ Skip to the end of the file<\/span>\r\n            }\r\n            <span class=\"hljs-keyword\">return<\/span> reader.getLineNumber() + <span class=\"hljs-number\">1<\/span>;\r\n        } <span class=\"hljs-keyword\">catch<\/span> (Exception e) {\r\n            e.printStackTrace();\r\n            <span class=\"hljs-keyword\">return<\/span> -<span class=\"hljs-number\">1<\/span>;\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>The above code defines a method called countLines, which takes a file name as a parameter and returns the number of lines in the file. In the countLines method, we use LineNumberReader to read the file and skip to the end of the file using the skip method. Then, we can get the current line number by calling the getLineNumber method, and adding 1 gives us the number of lines in the file. If any exceptions occur while reading the file, we will print the exception information and return -1.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>You can use the LineNumberReader class to retrieve the number of lines in a file. import java.io.FileReader; import java.io.LineNumberReader; public class LineCount { public static void main(String[] args) { String fileName = &#8220;path\/to\/file.txt&#8221;; int lineCount = countLines(fileName); System.out.println(&#8220;Total number of lines: &#8221; + lineCount); } public static int countLines(String fileName) { try (LineNumberReader reader = [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-27080","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"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>How to write Java code to get the number of lines in a file? - Blog - Silicon Cloud<\/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:\/\/www.silicloud.com\/blog\/how-to-write-java-code-to-get-the-number-of-lines-in-a-file\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to write Java code to get the number of lines in a file?\" \/>\n<meta property=\"og:description\" content=\"You can use the LineNumberReader class to retrieve the number of lines in a file. import java.io.FileReader; import java.io.LineNumberReader; public class LineCount { public static void main(String[] args) { String fileName = &quot;path\/to\/file.txt&quot;; int lineCount = countLines(fileName); System.out.println(&quot;Total number of lines: &quot; + lineCount); } public static int countLines(String fileName) { try (LineNumberReader reader = [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-to-write-java-code-to-get-the-number-of-lines-in-a-file\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-16T07:50:41+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-22T10:09:25+00:00\" \/>\n<meta name=\"author\" content=\"Ava Mitchell\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Ava Mitchell\" \/>\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:\/\/www.silicloud.com\/blog\/how-to-write-java-code-to-get-the-number-of-lines-in-a-file\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-write-java-code-to-get-the-number-of-lines-in-a-file\/\"},\"author\":{\"name\":\"Ava Mitchell\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/a3e2658c2cb9fb2be95ae0a8861f4a64\"},\"headline\":\"How to write Java code to get the number of lines in a file?\",\"datePublished\":\"2024-03-16T07:50:41+00:00\",\"dateModified\":\"2024-03-22T10:09:25+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-write-java-code-to-get-the-number-of-lines-in-a-file\/\"},\"wordCount\":118,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-write-java-code-to-get-the-number-of-lines-in-a-file\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-to-write-java-code-to-get-the-number-of-lines-in-a-file\/\",\"name\":\"How to write Java code to get the number of lines in a file? 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