{"id":20465,"date":"2022-11-09T18:59:15","date_gmt":"2022-11-09T13:29:15","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-perform-computations-in-array-list\/"},"modified":"2022-11-09T18:59:15","modified_gmt":"2022-11-09T13:29:15","slug":"solved-how-to-perform-computations-in-array-list","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-perform-computations-in-array-list\/","title":{"rendered":"[Solved] How to perform Computations in Array list?"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-37693022\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"37693022\" data-parentid=\"37692789\" 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>This is the sample answer .When I checked your question,I saw that I need to create one person class with name,accountNo,amount,accType,Date.When we check two array List to subtract,we need to find same AccountNo in both array.So we need to use contains method and I override equal and hashCode.My Sample Person class is just like:<br \/>\npackage java7.demo;<\/p>\n<pre><code>import java.util.Date;\n\npublic class Person {\n    private String name;\n    private int accountNo;\n    private String accType;\n    private int amount;\n    private Date date;\n    public String getName() {\n        return name;\n    }\n    public void setName(String name) {\n        this.name = name;\n    }\n    public int getAccountNo() {\n        return accountNo;\n    }\n    public void setAccountNo(int accountNo) {\n        this.accountNo = accountNo;\n    }\n    public String getAccType() {\n        return accType;\n    }\n    public void setAccType(String accType) {\n        this.accType = accType;\n    }\n    public int getAmount() {\n        return amount;\n    }\n    public void setAmount(int amount) {\n        this.amount = amount;\n    }\n    public Date getDate() {\n        return date;\n    }\n    public void setDate(Date date) {\n        this.date = date;\n    }\n    @Override\n    public int hashCode() {\n        final int prime = 31;\n        int result = 1;\n        result = prime * result + accountNo;\n        return result;\n    }\n    @Override\n    public boolean equals(Object obj) {\n        if (this == obj)\n            return true;\n        if (obj == null)\n            return false;\n        if (getClass() != obj.getClass())\n            return false;\n        Person other = (Person) obj;\n        if (accountNo != other.accountNo)\n            return false;\n        return true;\n    }\n    @Override\n    public String toString() {\n        return \"name=\" + name + \", accountNo=\" + accountNo\n                + \", accType=\" + accType + \", amount=\" + amount + \", date=\"\n                + date + \"\";\n    }\n\n\n\n\n}\n<\/code><\/pre>\n<p>Main Class is just like:<\/p>\n<pre><code>import java.util.ArrayList;\nimport java.util.Date;\nimport java.util.List;\n\npublic class AccountSubtractionTest {\n\n    @SuppressWarnings(\"deprecation\")\n    public static void main(String args[]){\n\n        List&lt;Person&gt;FinalAmount = new ArrayList&lt;Person&gt;();\n        List&lt;Person&gt;Transcation = new ArrayList&lt;Person&gt;();\n        @SuppressWarnings(\"deprecation\")\n        Date d1 = new Date(\"01\/01\/2016\");\n        @SuppressWarnings(\"unused\")\n        Date d2 = new Date(\"04\/01\/2016\");\n        Person p1 = new Person();\n        p1.setName(\"Peter\");\n        p1.setAccountNo(1234);\n        p1.setAccType(\"Saving\");\n        p1.setAmount(5000);\n        p1.setDate(d1);\n\n\n        Person p2 = new Person();\n        p2.setName(\"Robin\");\n        p2.setAccountNo(2222);\n        p2.setAccType(\"Saving\");\n        p2.setAmount(5000);\n        p2.setDate(new Date(\"02\/02\/2016\"));\n\n        FinalAmount.add(p1);\n        FinalAmount.add(p2);\n\n        Person p3 = new Person();\n        p3.setName(\"Peter\");\n        p3.setAccountNo(1234);\n        p3.setAccType(\"Saving\");\n        p3.setAmount(1000);\n        p3.setDate(d2);\n\n        Person p4 = new Person();\n        p4.setName(\"Robin\");\n        p4.setAccountNo(2222);\n        p4.setAccType(\"Saving\");\n        p4.setAmount(2000);\n        p4.setDate(new Date(\"04\/02\/2016\"));\n\n        Transcation.add(p3);\n        Transcation.add(p4);\n\n        for(Person p:FinalAmount){\n            if(Transcation.contains(p)){\n                int index = Transcation.indexOf(p);\n                Person person = Transcation.get(index);\n                int amount = p.getAmount() - person.getAmount();\n                p.setAmount(amount);\n                Transcation.remove(index);\n            }\n        }\n\n        for(int i=0; i&lt;FinalAmount.size(); i++){\n            System.out.println(FinalAmount.get(i));\n        }\n\n\n\n\n\n\n    }\n\n}\n<\/code><\/pre>\n<p>in main class,i just use Date d1 = new Date(&#8220;01\/01\/2016&#8221;).So you need to change the date type format that you want to use.My date is just for sample.When I run the code output get is just like:<\/p>\n<pre><code>name=Peter, accountNo=1234, accType=Saving, amount=4000, date=Fri Jan 01 00:00:00 MMT 2016\nname=Robin, accountNo=2222, accType=Saving, amount=3000, date=Tue Feb 02 00:00:00 MMT 2016\n<\/code><\/pre>\n<p>Please run the two classes that I gave as sample and Please see which code you need to modify.<\/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 How to perform Computations in Array list? <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] This is the sample answer .When I checked your question,I saw that I need to create one person class with name,accountNo,amount,accType,Date.When we check two array List to subtract,we need to find same AccountNo in both array.So we need to use contains method and I override equal and hashCode.My Sample Person class is just like: &#8230; <a title=\"[Solved] How to perform Computations in Array list?\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-perform-computations-in-array-list\/\" aria-label=\"More on [Solved] How to perform Computations in Array list?\">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":[479,361,323],"class_list":["post-20465","post","type-post","status-publish","format-standard","hentry","category-solved","tag-arraylist","tag-arrays","tag-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - 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