{"id":3354,"date":"2019-05-01T18:07:07","date_gmt":"2019-05-01T18:07:07","guid":{"rendered":"http:\/\/codethataint.com\/blog\/?p=3354"},"modified":"2024-07-30T16:03:57","modified_gmt":"2024-07-30T16:03:57","slug":"stream-codes","status":"publish","type":"post","link":"https:\/\/codethataint.com\/blog\/stream-codes\/","title":{"rendered":"Stream Codes Examples"},"content":{"rendered":"

How to Search for Product with least cost from List? I have a List of Speakers in List. I want to get the speaker with the least cost.<\/strong><\/p>\n

Speakers.java<\/strong><\/p>\n

\r\npackage com.mugil.bean;\r\n\r\npublic class Speakers {\r\n private Integer speakerID;\r\n private String companyName;\r\n private Integer price;\r\n private String sellerName;\r\n\r\n public Speakers(Integer pSpeakerId, String pcompanyName, Integer pPrice, String psellerName) {\r\n  this.speakerID = pSpeakerId;\r\n  this.companyName = pcompanyName;\r\n  this.price = pPrice;\r\n  this.sellerName = psellerName;\r\n }\r\n\r\n public int getSpeakerID() {\r\n  return speakerID;\r\n }\r\n public void setSpeakerID(int speakerID) {\r\n  this.speakerID = speakerID;\r\n }\r\n public String getCompanyName() {\r\n  return companyName;\r\n }\r\n public void setCompanyName(String companyName) {\r\n  this.companyName = companyName;\r\n }\r\n public int getPrice() {\r\n  return price;\r\n }\r\n public void setPrice(int price) {\r\n  this.price = price;\r\n }\r\n\r\n public String getSellerName() {\r\n  return sellerName;\r\n }\r\n\r\n public void setSellerName(String sellerName) {\r\n  this.sellerName = sellerName;\r\n }\r\n\r\n @Override\r\n public String toString() {\r\n  return "Speakers [speakerID=" + speakerID + ", companyName=" + companyName + ", price=" + price +\r\n   ", sellerName=" + sellerName + "]";\r\n }\r\n}\r\n<\/pre>\n
SearchSpeakers.java<\/strong><\/p>\n
\r\npackage com.mugil.test;\r\n\r\nimport java.util.ArrayList;\r\nimport java.util.Comparator;\r\nimport java.util.List;\r\nimport java.util.stream.Collector;\r\nimport java.util.stream.Collectors;\r\n\r\nimport com.mugil.bean.Speakers;\r\n\r\npublic class SearchSpeakers {\r\n\r\n public static void main(String[] args) {\r\n  Speakers objSpeaker1 = new Speakers(101, "JBL Go", 120, "Amazon");\r\n  Speakers objSpeaker2 = new Speakers(102, "Panasonic", 420, "Amazon");\r\n  Speakers objSpeaker3 = new Speakers(103, "JBL Go", 900, "Flipkart");\r\n  Speakers objSpeaker4 = new Speakers(104, "JBL Go", 120, "Amazon");\r\n  Speakers objSpeaker5 = new Speakers(105, "JBL Go", 350, "Amazon");\r\n  Speakers objSpeaker6 = new Speakers(101, "Philips", 120, "EBay");\r\n  Speakers objSpeaker7 = new Speakers(102, "JBL Go", 125, "Ebay");\r\n  Speakers objSpeaker8 = new Speakers(103, "JBL Go", 35, "Smart Shoppe");\r\n  Speakers objSpeaker9 = new Speakers(104, "Panasonic", 80, "Amazon");\r\n  Speakers objSpeaker10 = new Speakers(105, "Philips", 180, "Amazon");\r\n\r\n  List < Speakers > arrSpeakers = new ArrayList < Speakers > ();\r\n\r\n  arrSpeakers.add(objSpeaker1);\r\n  arrSpeakers.add(objSpeaker2);\r\n  arrSpeakers.add(objSpeaker3);\r\n  arrSpeakers.add(objSpeaker4);\r\n  arrSpeakers.add(objSpeaker5);\r\n  arrSpeakers.add(objSpeaker6);\r\n  arrSpeakers.add(objSpeaker7);\r\n  arrSpeakers.add(objSpeaker8);\r\n  arrSpeakers.add(objSpeaker9);\r\n  arrSpeakers.add(objSpeaker10);\r\n\r\n  Comparator < Speakers > spkComparator = (Speakers objSpeaker1a, Speakers objSpeaker2a) -> objSpeaker1a.getPrice() - objSpeaker2a.getPrice();\r\n\r\n  arrSpeakers.stream().sorted(spkComparator).collect(Collectors.groupingBy(Speakers::getCompanyName)).values()\r\n   .stream().forEach(searchedModel -> System.out\r\n    .println("Speaker with Lowest Cost" + searchedModel.stream().findFirst()));\r\n }\r\n}\r\n<\/pre>\n
\r\narrSpeakers.stream().sorted(spkComparator).collect(Collectors.groupingBy(Speakers::getCompanyName)).values()\r\n   .stream().forEach(searchedModel -> System.out\r\n    .println("Speaker with Lowest Cost" + searchedModel.stream().findFirst()));\r\n<\/pre>\n
arrSpeakers.stream() <\/em>– Convert to Stream
\narrSpeakers.stream().sorted(spkComparator)<\/em> – Sorts the list by price
\narrSpeakers.stream().sorted(spkComparator).collect(Collectors.groupingBy(Speakers::getCompanyName)) <\/em>– Groups the Sorted List by Company Name
\narrSpeakers.stream().sorted(spkComparator).collect(Collectors.groupingBy(Speakers::getCompanyName)).values()
\n   .stream()<\/em> – Convert the Sorted List into Stream<\/p>\n
The above code could be rewritten as follows<\/p>\n
\r\n\/\/Sort by Price and group by company name\r\nStream objStream = arrSpeakers.stream()\r\n                              .sorted(spkComparator)\r\n                              .collect(Collectors.groupingBy(Speakers::getCompanyName)).values();\r\n\r\n\/\/Loop through Stream of List and print the first one\r\nobjStream.forEach(listOfStudent -> System.out.println((ArrayList)listOfStudent.stream().findFirst()));\r\n<\/pre>\n
Output<\/strong><\/p>\n
\r\nSpeaker with Lowest CostOptional[Speakers [speakerID=101, companyName=Philips, price=120, sellerName=EBay]]\r\nSpeaker with Lowest CostOptional[Speakers [speakerID=104, companyName=Panasonic, price=80, sellerName=Amazon]]\r\nSpeaker with Lowest CostOptional[Speakers [speakerID=103, companyName=JBL Go, price=35, sellerName=Smart Shoppe]]\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
How to Search for Product with least cost from List? I have a List of Speakers in List. I want to get the speaker with the least cost. Speakers.java package com.mugil.bean; public class Speakers { private Integer speakerID; private String companyName; private Integer price; private String sellerName; public Speakers(Integer pSpeakerId, String pcompanyName, Integer pPrice, String… Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[277,251],"tags":[],"class_list":["post-3354","post","type-post","status-publish","format-standard","hentry","category-codes","category-streams"],"_links":{"self":[{"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/posts\/3354","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/comments?post=3354"}],"version-history":[{"count":3,"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/posts\/3354\/revisions"}],"predecessor-version":[{"id":5056,"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/posts\/3354\/revisions\/5056"}],"wp:attachment":[{"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/media?parent=3354"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/categories?post=3354"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/tags?post=3354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}