{"id":31557,"date":"2023-01-22T12:00:31","date_gmt":"2023-01-22T06:30:31","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-count-values-from-java-object\/"},"modified":"2023-01-22T12:00:31","modified_gmt":"2023-01-22T06:30:31","slug":"solved-count-values-from-java-object","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-count-values-from-java-object\/","title":{"rendered":"[Solved] Count values from Java Object?"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-39429608\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"39429608\" data-parentid=\"39429379\" 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>You could make use of Java 8 Stream API and implement something like this:<\/p>\n<pre><code>public static void main(String[] args) {\n    PaymentDetailsItem payment = new PaymentDetailsItem(\"test\", \"100.00\", 10, \"1\");\n    PaymentDetailsItem payment2 = new PaymentDetailsItem(\"test number 2\", \"250.00\", 10, \"2\");\n\n    List&lt;PaymentDetailsItem&gt; payments = new ArrayList&lt;&gt;();\n    payments.add(payment);\n    payments.add(payment2);\n\n    List&lt;String&gt; amounts = payments.stream().map(PaymentDetailsItem::getAmount).collect(Collectors.toList());\n    System.out.println(\"Here we have the extracted List of amounts: \" + amounts);\n\n    String totalAmount = amounts.stream()\n            .reduce((amount1, amount2) -&gt; String.valueOf(Float.valueOf(amount1) + Float.valueOf(amount2))).get();\n    System.out.println(\"Total amount obtained by using .reduce() upon the List of amounts: \" + totalAmount);\n\n    System.out.println(\"Or you can do everything at once: \" + payments.stream().map(PaymentDetailsItem::getAmount)\n            .reduce((amount1, amount2) -&gt; String.valueOf(Float.valueOf(amount1) + Float.valueOf(amount2))).get());\n}\n<\/code><\/pre>\n<p>Remember to implement the getter for the amount attribute.<\/p>\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 Count values from Java Object? <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] You could make use of Java 8 Stream API and implement something like this: public static void main(String[] args) { PaymentDetailsItem payment = new PaymentDetailsItem(&#8220;test&#8221;, &#8220;100.00&#8221;, 10, &#8220;1&#8221;); PaymentDetailsItem payment2 = new PaymentDetailsItem(&#8220;test number 2&#8221;, &#8220;250.00&#8221;, 10, &#8220;2&#8221;); List&lt;PaymentDetailsItem&gt; payments = new ArrayList&lt;&gt;(); payments.add(payment); payments.add(payment2); List&lt;String&gt; amounts = payments.stream().map(PaymentDetailsItem::getAmount).collect(Collectors.toList()); System.out.println(&#8220;Here we have the extracted &#8230; <a title=\"[Solved] Count values from Java Object?\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-count-values-from-java-object\/\" aria-label=\"More on [Solved] Count values from Java Object?\">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-31557","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] Count values from Java Object? - 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-count-values-from-java-object\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Count values from Java Object? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] You could make use of Java 8 Stream API and implement something like this: public static void main(String[] args) { PaymentDetailsItem payment = new PaymentDetailsItem(&quot;test&quot;, &quot;100.00&quot;, 10, &quot;1&quot;); PaymentDetailsItem payment2 = new PaymentDetailsItem(&quot;test number 2&quot;, &quot;250.00&quot;, 10, &quot;2&quot;); List&lt;PaymentDetailsItem&gt; payments = new ArrayList&lt;&gt;(); payments.add(payment); payments.add(payment2); List&lt;String&gt; amounts = payments.stream().map(PaymentDetailsItem::getAmount).collect(Collectors.toList()); System.out.println(&quot;Here we have the extracted ... 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