{"id":14256,"date":"2022-10-07T02:26:00","date_gmt":"2022-10-06T20:56:00","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-output-for-reversing-a-string-does-not-come-as-expected\/"},"modified":"2022-10-07T02:26:00","modified_gmt":"2022-10-06T20:56:00","slug":"solved-output-for-reversing-a-string-does-not-come-as-expected","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-output-for-reversing-a-string-does-not-come-as-expected\/","title":{"rendered":"[Solved] Output for reversing a string does not come as expected"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-34372645\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"34372645\" data-parentid=\"34372017\" 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>For approach 1, all you need to do is remove the call to <code>sc.nextLine()<\/code> and everything will be fine. That&#8217;s because each line contains a &#8220;token&#8221; i.e. a word, delimited by whitespace. That&#8217;s what <code>sc.next()<\/code> will return. No need to call <code>nextLine()<\/code> after that.<\/p>\n<p>For your approach 2, you should carefully read the <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/docs.oracle.com\/javase\/8\/docs\/api\/java\/lang\/StringBuilder.html\">API documentation of StringBuilder<\/a>. This shows you how to create a String from a StringBuilder, and vice versa. (Whenever I write Java code, I have a browser window with the API documentation for quick reference next to my editor window. It&#8217;s very useful.)<\/p>\n<p>Edit (after the latest edit to the question):<\/p>\n<p>There is a compilation problem and a runtime problem. First, the XOR operator produces a result of type int, even if its operands are char. So you should put your expression in parentheses and cast it to char. Once you&#8217;ve done that, you&#8217;ll get a runtime error because you are trying to index an element of a StringBuilder which does not yet exist. When you created the StringBuilder like this:<\/p>\n<pre><code>StringBuilder input1=new StringBuilder(len);\n<\/code><\/pre>\n<p>len is the initial capacity. The value of the StringBuilder instance is initially &#8220;&#8221;. You then call setCharAt() but the current size of the StringBuilder is 0, so you get an index-out-of-bounds exception. You need to initialise the StringBuilder with the string itself:<\/p>\n<pre><code>StringBuilder input1=new StringBuilder(input);\n<\/code><\/pre>\n<p>Now you won&#8217;t get an exception, but you&#8217;ll get the wrong answer. That&#8217;s because of a problem with your XOR logic.<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\"><\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Output for reversing a string does not come as expected <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] For approach 1, all you need to do is remove the call to sc.nextLine() and everything will be fine. That&#8217;s because each line contains a &#8220;token&#8221; i.e. a word, delimited by whitespace. That&#8217;s what sc.next() will return. No need to call nextLine() after that. For your approach 2, you should carefully read the API &#8230; <a title=\"[Solved] Output for reversing a string does not come as expected\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-output-for-reversing-a-string-does-not-come-as-expected\/\" aria-label=\"More on [Solved] Output for reversing a string does not come as expected\">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":[323,362],"class_list":["post-14256","post","type-post","status-publish","format-standard","hentry","category-solved","tag-java","tag-string"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Output for reversing a string does not come as expected - 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-output-for-reversing-a-string-does-not-come-as-expected\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Output for reversing a string does not come as expected - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] For approach 1, all you need to do is remove the call to sc.nextLine() and everything will be fine. That&#8217;s because each line contains a &#8220;token&#8221; i.e. a word, delimited by whitespace. That&#8217;s what sc.next() will return. No need to call nextLine() after that. For your approach 2, you should carefully read the API ... 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