{"id":28104,"date":"2022-12-28T16:51:37","date_gmt":"2022-12-28T11:21:37","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-null-pointer-access-this-variable-dt_str-can-only-be-null\/"},"modified":"2022-12-28T16:51:37","modified_gmt":"2022-12-28T11:21:37","slug":"solved-null-pointer-access-this-variable-dt_str-can-only-be-null","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-null-pointer-access-this-variable-dt_str-can-only-be-null\/","title":{"rendered":"[Solved] Null Pointer access: This variable dt_str can only be null"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-52555314\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"52555314\" data-parentid=\"52555202\" 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>Actually no clue what exactly you wanted to achieve with your code, since several variables are undefinied (<code>dateString<\/code> and <code>s<\/code> for example). Also is the array <code>m[]<\/code> definied in a wrong way (double <code>\"<\/code> within the data part) &#8211; however, I &#8220;fixed&#8221; your code with the given information:<\/p>\n<pre><code>    String[] m = {\"01\", \"02\", \"03\"};\n    String[] d = {\"01\", \"02\", \"03\", \"04\", \"05\", \"06\", \"07\", \"08\", \"09\", \"10\", \"11\", \"12\", \"13\", \"14\", \"15\"};\n    StringBuilder sb = new StringBuilder();\n    for (int i = 0; i &lt; m.length; i++) {\n        for (int j = 0; j &lt; d.length; j++) {\n            sb.append(m[i] + d[j] + \" \");\n        }\n    }\n    System.out.println(sb.toString());\n<\/code><\/pre>\n<p>And this does output <code>0101 0102 0103 0104 0105 0106 0107 0108 0109 0110 0111 0112 0113 0114 0115 0201 0202 0203 0204 0205 0206 0207 0208 0209 0210 0211 0212 0213 0214 0215 0301 0302 0303 0304 0305 0306 0307 0308 0309 0310 0311 0312 0313 0314 0315<\/code> <\/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 Null Pointer access: This variable dt_str can only be null <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Actually no clue what exactly you wanted to achieve with your code, since several variables are undefinied (dateString and s for example). Also is the array m[] definied in a wrong way (double &#8221; within the data part) &#8211; however, I &#8220;fixed&#8221; your code with the given information: String[] m = {&#8220;01&#8221;, &#8220;02&#8221;, &#8220;03&#8221;}; &#8230; <a title=\"[Solved] Null Pointer access: This variable dt_str can only be null\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-null-pointer-access-this-variable-dt_str-can-only-be-null\/\" aria-label=\"More on [Solved] Null Pointer access: This variable dt_str can only be null\">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-28104","post","type-post","status-publish","format-standard","hentry","category-solved","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] Null Pointer access: This variable dt_str can only be null - 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-null-pointer-access-this-variable-dt_str-can-only-be-null\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Null Pointer access: This variable dt_str can only be null - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Actually no clue what exactly you wanted to achieve with your code, since several variables are undefinied (dateString and s for example). 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