{"id":14840,"date":"2022-10-09T08:34:05","date_gmt":"2022-10-09T03:04:05","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-java-program-to-sort-a-sequence-of-numbers-in-a-text-file-closed\/"},"modified":"2022-10-09T08:34:05","modified_gmt":"2022-10-09T03:04:05","slug":"solved-java-program-to-sort-a-sequence-of-numbers-in-a-text-file-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-java-program-to-sort-a-sequence-of-numbers-in-a-text-file-closed\/","title":{"rendered":"[Solved] Java program to sort a sequence of numbers in a text file [closed]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-49845341\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"49845341\" data-parentid=\"49845196\" 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>Assuming you want help and not complete code:<\/p>\n<ol>\n<li>Read a textfile: <code>FileReader<\/code> &#8230;<\/li>\n<li>&#8230; line-by-line: <code>BufferedReader<\/code> and its <code>readLine()<\/code> method<\/li>\n<li>Integer from text: <code>Integer.parseInt()<\/code> (assumption: there is one number per line)<\/li>\n<li>Store Integers in something, which orders them, and removes duplicates: <code>TreeSet&lt;Integer&gt;<\/code>, and its <code>add()<\/code> method<\/li>\n<li>Get back the numbers (ordered, duplicates removed): <code>iterator()<\/code> (of the same <code>TreeSet&lt;Integer&gt;<\/code>)<\/li>\n<li>Writing a textfile: <code>PrintWriter<\/code><\/li>\n<\/ol>\n<p>There are some gaps, but reading the documentation and checking related examples will fill them.\n<\/p>\n<hr>\n<p>Without any fancy\/cryptic construct:<\/p>\n<pre><code>public static void main(String[] args) throws Exception {\n    TreeSet&lt;Integer&gt; numbers=new TreeSet&lt;&gt;();\n    FileReader fr=new FileReader(\"numbers.txt\");\n    BufferedReader br=new BufferedReader(fr);\n    String line;\n    while((line=br.readLine())!=null){\n        numbers.add(Integer.parseInt(line));\n    }\n    br.close();\n    Iterator&lt;Integer&gt; it=numbers.iterator();\n    while(it.hasNext()){\n        System.out.println(it.next());\n    }\n    \/\/PrintWriter pw=new PrintWriter(\"result.txt\");\n    \/\/while(it.hasNext()){\n    \/\/  pw.println(it.next());\n    \/\/}\n    \/\/pw.close();\n}\n<\/code><\/pre>\n<p>The commented part would print the result into a file.<\/p>\n<p>Test file: numbers.txt<\/p>\n<pre><code>34\n2345\n736\n2435\n7436\n2345\n2435\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">11<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Java program to sort a sequence of numbers in a text file [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Assuming you want help and not complete code: Read a textfile: FileReader &#8230; &#8230; line-by-line: BufferedReader and its readLine() method Integer from text: Integer.parseInt() (assumption: there is one number per line) Store Integers in something, which orders them, and removes duplicates: TreeSet&lt;Integer&gt;, and its add() method Get back the numbers (ordered, duplicates removed): iterator() &#8230; <a title=\"[Solved] Java program to sort a sequence of numbers in a text file [closed]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-java-program-to-sort-a-sequence-of-numbers-in-a-text-file-closed\/\" aria-label=\"More on [Solved] Java program to sort a sequence of numbers in a text file [closed]\">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-14840","post","type-post","status-publish","format-standard","hentry","category-solved","tag-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Java program to sort a sequence of numbers in a text file [closed] - 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-program-to-sort-a-sequence-of-numbers-in-a-text-file-closed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Java program to sort a sequence of numbers in a text file [closed] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Assuming you want help and not complete code: Read a textfile: FileReader &#8230; 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