{"id":14029,"date":"2022-10-06T06:55:35","date_gmt":"2022-10-06T01:25:35","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-do-i-convert-a-set-into-2d-array-in-java-closed\/"},"modified":"2022-10-06T06:55:35","modified_gmt":"2022-10-06T01:25:35","slug":"solved-how-do-i-convert-a-set-into-2d-array-in-java-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-do-i-convert-a-set-into-2d-array-in-java-closed\/","title":{"rendered":"[Solved] How do i convert a Set into 2D array in java? [closed]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-41209169\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"41209169\" data-parentid=\"41208940\" 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>Let be a:<\/p>\n<pre><code>public class MyClassWhithFourFields {\n String field1;\n int field2;\n Object field3;\n double field4;\n}\n<\/code><\/pre>\n<p>Now you can declare a set with this template: <\/p>\n<pre><code>Set&lt;MyClassWhithFourFields&gt; mySet = new HashSet&lt;MyClassWhithFourFields&gt;();\n<\/code><\/pre>\n<p>In your Set are your objects, which has 4 fields.<\/p>\n<p>If you want to declare a 2 dimension array, than what type should be?<br \/>\n&#8211; the most common parent can be, and in this case it is the Object.<\/p>\n<p>So declare a function an implement it:<\/p>\n<pre><code>Object[][] transformSetTo2dArray(Set &lt; MyClassWhithFourFields &gt; mySet) {\n if (mySet == null) {\n  return null;\n }\n Object[][] result = new Object[4][mySet.size()];\n int j = 0;\n \/\/ iterate the set:\n for (MyClassWhithFourFields myObject: mySet) {\n  myObject[0][j] = myObject.field1;\n  myObject[1][j] = myObject.field2;\n  myObject[2][j] = myObject.field3;\n  myObject[3][j] = myObject.field4;\n  j++;\n }\n return result;\n}\n<\/code><\/pre>\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 How do i convert a Set into 2D array in java? [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Let be a: public class MyClassWhithFourFields { String field1; int field2; Object field3; double field4; } Now you can declare a set with this template: Set&lt;MyClassWhithFourFields&gt; mySet = new HashSet&lt;MyClassWhithFourFields&gt;(); In your Set are your objects, which has 4 fields. If you want to declare a 2 dimension array, than what type should be? &#8230; <a title=\"[Solved] How do i convert a Set into 2D array in java? [closed]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-how-do-i-convert-a-set-into-2d-array-in-java-closed\/\" aria-label=\"More on [Solved] How do i convert a Set into 2D array in java? [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":[1616,323],"class_list":["post-14029","post","type-post","status-publish","format-standard","hentry","category-solved","tag-collections","tag-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] How do i convert a Set into 2D array in java? 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