{"id":19723,"date":"2022-11-07T13:47:32","date_gmt":"2022-11-07T08:17:32","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-read-two-matrices-from-a-txt-file-in-java\/"},"modified":"2022-11-07T13:47:32","modified_gmt":"2022-11-07T08:17:32","slug":"solved-how-to-read-two-matrices-from-a-txt-file-in-java","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-read-two-matrices-from-a-txt-file-in-java\/","title":{"rendered":"[Solved] How to read two matrices from a txt file in java"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-55102861\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"55102861\" data-parentid=\"55102669\" data-score=\"0\" 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 have to:<\/p>\n<ul>\n<li>\n<p>read first line<\/p>\n<\/li>\n<li>\n<p>split it to get dimensions<\/p>\n<\/li>\n<li>\n<p>read next lines (regards dimensions)<\/p>\n<\/li>\n<li>\n<p>read special char (<code>@<\/code>)<\/p>\n<\/li>\n<li>\n<p>repeat<\/p>\n<\/li>\n<\/ul>\n<p>Reading first array you have there:<\/p>\n<pre><code>static void readFile() throws IOException {\n    BufferedReader reader;\n    reader = new BufferedReader(new FileReader(\"file.txt\"));\n\n    String firstDimension = reader.readLine();\n    String[] split = firstDimension.split(\" \");\n    int firstX = Integer.parseInt(split[0]);\n    int firstY = Integer.parseInt(split[0]);\n\n    int[][] first = new int[firstX][firstY];\n\n    for (int i = 0; i &lt; firstX; i++) {\n        String[] line = reader.readLine().split(\" \");\n\n        for (int j = 0; j &lt; firstY; j++) {\n            first[i][j] = Integer.parseInt(line[j]);\n        }\n\n    }\n\n    \/\/ Read \"@\"\n    reader.readLine();\n\n    System.out.println(Arrays.deepToString(first));\n\n\n}\n<\/code><\/pre>\n<p>and base on input:<\/p>\n<pre><code>3 3\n12 34 45\n34 -12 56\n76 12 -1\n@\n3 3\n8 13 45\n67 0 12\n12 -12 3\n<\/code><\/pre>\n<p>output should be:<\/p>\n<pre><code>[[12, 34, 45], [34, -12, 56], [76, 12, -1]]\n<\/code><\/pre>\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 read two matrices from a txt file in java <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] You have to: read first line split it to get dimensions read next lines (regards dimensions) read special char (@) repeat Reading first array you have there: static void readFile() throws IOException { BufferedReader reader; reader = new BufferedReader(new FileReader(&#8220;file.txt&#8221;)); String firstDimension = reader.readLine(); String[] split = firstDimension.split(&#8221; &#8220;); int firstX = Integer.parseInt(split[0]); int &#8230; <a title=\"[Solved] How to read two matrices from a txt file in java\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-read-two-matrices-from-a-txt-file-in-java\/\" aria-label=\"More on [Solved] How to read two matrices from a txt file in java\">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":[361,323,1331,2905],"class_list":["post-19723","post","type-post","status-publish","format-standard","hentry","category-solved","tag-arrays","tag-java","tag-matrix","tag-matrix-multiplication"],"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 read two matrices from a txt file in java - 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-read-two-matrices-from-a-txt-file-in-java\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] How to read two matrices from a txt file in java - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] You have to: read first line split it to get dimensions read next lines (regards dimensions) read special char (@) repeat Reading first array you have there: static void readFile() throws IOException { BufferedReader reader; reader = new BufferedReader(new FileReader(&quot;file.txt&quot;)); String firstDimension = reader.readLine(); String[] split = firstDimension.split(&quot; &quot;); int firstX = Integer.parseInt(split[0]); int ... 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