Java 8 Streams programs you must prepare for Java Interviews

Below are the frequently asked programs during the coding round in java interviews. In this video, I explain the below programs in detail.
Please make sure, you prepare well for the below programs.
1.Write a program to print employee details working in each department
2.Write a program to print employees count working in each department
3.Write a program to print active and inactive employees in the given collection
4.Write a program to print Max/Min employee salary from the given collection
5.Write a program to print the max salary of an employee from each department

[@SandeepKumar-se2fd]

Great and wonderful example for Stream API.... Great!!!!!

[@SivaReddyJavaTechie]

Glad you liked it!

[@venkatesha6378]

super siva , good keep it up. its 13 years since we met.

[@InterviewDOT]

Very nice thanks for sharing 👌🙏

[@venkatsam2472]

Wonderful explanation with example. Thank you so much. Will be waiting to see more videos.. 👏🏻👌🏻🙏🏻👍

[@javatech8530]

HCL Technologies Technical Round | 5+ Years Virtual Interview | Java Developers kzbin.info/www/bejne/jZ7bnYGmest_ZpY

[@lakshmidevilakshmidevi3984]

Thank you for sharing your knowledge with us Sir

[@JameS00989]

Amazing video Shiva much appreciated

[@SivaReddyJavaTechie]

Glad you liked it

[@SuccessToSamadhi]

excellent sir.. Thank you

[@chetandy2573]

Thanks sir, very nicely explained

[@javatech8530]

HCL Technologies Technical Round | 5+ Years Virtual Interview | Java Developers kzbin.info/www/bejne/jZ7bnYGmest_ZpY

[@javatech8530]

HCL Technologies Technical Round | 5+ Years Virtual Interview | Java Developers kzbin.info/www/bejne/jZ7bnYGmest_ZpY

[@zuberdiwan8123]

Very Nice Video. very well Explained. Thank You.......

[@SivaReddyJavaTechie]

You are most welcome

[@Vithal_Nivargi]

Thank you please make one more video on Java8 coding questions

[@maheshuma741]

Thank you sir for making this video. . To get active and Inactive works in a single Iteration we can use partitionBy() method. Sample Code : employeeList.stream().collect( Collectors.partitioningBy(emp->"active".equalsIgnoreCase(emp.getName())) , It returns Map . At the calling place map.get(true) for active and map.get(false) for inactive.. We have n number of ways it is the one of the way.

[@kshitijbansal3672]

Can we do like this also? List.stream(). collect (Collectors.groupingBy(Employee: getStatus(), Collectors.counting()); It will first group by on basis of Active and Inactive and then count it.

[@deepa8177]

great video specially quetsion no 5.

[@DMvali]

Thanks siva!

[@riteshchiddarwar9881]

@siva, its very useful for quick review of java 8 streams. Very nice example you taken and explained . 👍 very best and helpful.

[@javatech8530]

HCL Technologies Technical Round | 5+ Years Virtual Interview | Java Developers kzbin.info/www/bejne/jZ7bnYGmest_ZpY

[@mamatharao2127]

Excellent

[@anandpadamala3586]

Nice sir 👌

[@maheshd3506]

clear explanation and thanks

[@SivaReddyJavaTechie]

Glad you liked it

[@thebaseofpcmbclasses8028]

nice explanation sir

[@maheshuma741]

To calculate dept wise statistics like min,max,average we can use following code : empList.stream.collect(Collectors.groupingBy(Employee::getDeptId, Collectors. summarizingDouble(Employee::getSal))) ; it returns Map . Just for knowledge purpose sharing my thoughts.. Don't take it in another way.

[@deepa8177]

thanks fro sharing..

[@adityapratapsingh7311]

Very helpful videos,make more such java8 programming videos....thanks a lot sir

[@javatech8530]

HCL Technologies Technical Round | 5+ Years Virtual Interview | Java Developers kzbin.info/www/bejne/jZ7bnYGmest_ZpY

[@poojas1600]

Excellent video

[@SivaReddyJavaTechie]

Thank you very much!

[@srinivass5552]

Thanks sir very useful

[@javatech8530]

HCL Technologies Technical Round | 5+ Years Virtual Interview | Java Developers kzbin.info/www/bejne/jZ7bnYGmest_ZpY

[@muchukundareddy5315]

Hi Siva, I tried Lambda expression as input for "Comparator.comparing" It was not working

[@bacchaparty6275]

U r brilliant sir

[@SivaReddyJavaTechie]

Thanks Amit. Please share our KZbin channel to your friends circle as it may be helpful for them. Happy Learning.

[@bacchaparty6275]

@@SivaReddyJavaTechie Sure Sir

[@javatech8530]

HCL Technologies Technical Round | 5+ Years Virtual Interview | Java Developers kzbin.info/www/bejne/jZ7bnYGmest_ZpY

[@kemparaj565]

Amazing explanation. Thank You 😊. Could have formatted the code. Few parts of code is missing.

[@abhishekjain6559]

Nice video.. very nicely explain.. Can you please explain the reducing function example.

[@local-host80-80]

thanks

[@SivaReddyJavaTechie]

Thanks Nagesh. Please refer our KZbin Channel to your friends and colleagues as it may helpful for them. Happy learning.

[@start1learn-n171]

Tq

[@rajuls6101]

Sir can you answer this select employee where department is technology and location not equal to mumbai..

[@ShinAkuma]

filter( e -> "technology".equals(e.getTechnology()) && !( "mumbai".equals(e.getCity()) ) )

[@Proman.Offbeat.Traveller]

NYC information 22:33

[@indranildas8485]

what is the name of the background music?

[@dharamkirti24]

Sir a git hub link would have been helpful

[@vikrantharne5269]

Sir outer joins practice questions plz..scenario based

[@SivaReddyJavaTechie]

Sure. I will upload soon.

[@vikrantharne5269]

@@SivaReddyJavaTechie waiting..I'm still confused abt tht topic...

[@SivaReddyJavaTechie]

Sure. I will upload video on the requested topic as soon as possible

[@javatech8530]

HCL Technologies Technical Round | 5+ Years Virtual Interview | Java Developers kzbin.info/www/bejne/jZ7bnYGmest_ZpY

[@pratapjavasingh3239]

I can request u sir whenever u writing the codes then atleast first explain predefined method apart from that then u can write the code it's request 🙏

[@SivaReddyJavaTechie]

Hi Pratap, Good suggestion. I make a note of it and will do same for future videos.

[@pratapjavasingh3239]

@@SivaReddyJavaTechie Thank you 🙏

[@javatech8530]

HCL Technologies Technical Round | 5+ Years Virtual Interview | Java Developers kzbin.info/www/bejne/jZ7bnYGmest_ZpY

[@morning8474]

sir plz upload hai video where u would teach run time question only.............Request by your suscriber

[@SivaReddyJavaTechie]

The intention is to emphasis on the importance of these programs so that viewers can pay more attention to prepare for the same and will get benefit in the interview.

[@javatech8530]

HCL Technologies Technical Round | 5+ Years Virtual Interview | Java Developers kzbin.info/www/bejne/jZ7bnYGmest_ZpY

[@knowledgeshare1622]

how to find sum of the salary of each department????

[@jeckrazi7691]

Map mapEmpDept = empList.stream().collect(Collectors.groupingBy(Employee::getDept, Collectors.summarizingInt(Employee::getSalary))); mapEmpDept.entrySet().forEach(entry -> System.out.println("Dept:: " + entry.getKey() + " & Sum:: " + entry.getValue().getMin()));

[@enlightened7354]

Filter?

[@CodeUpskill]

hi siva, can u give code github url?

[@javatech8530]

HCL Technologies Technical Round | 5+ Years Virtual Interview | Java Developers kzbin.info/www/bejne/jZ7bnYGmest_ZpY

[@gottepavani1838]

Sir how to get second max salary

[@jeckrazi7691]

//Second Minimum Salary empList.stream().sorted(Comparator.comparing(Employee::getEmpSalary)).skip(1).limit(1).forEach(System.out::println); //Second Maximum Salary myEmployee_Demo.stream().sorted((e1,e2)-> (e1.getEmpSalary() < e2.getEmpSalary()) ? 1 : ((e1.getEmpSalary() == e2.getEmpSalary()) ? 0 : -1)).skip(1).limit(1).forEach(System.out::println);

[@chinnimounika8645]

Sir can you help me to slove my assignment programs in Java

[@errahulrajocjp]

Hello Sir ! Thank you for explanation. Q 5) Dept 103 having two employee having same salary 3500, but showing only one employee as a result ?

[@javatech8530]

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[@palanirajkumar4904]

sir send the code

[@javatech8530]

HCL Technologies Technical Round | 5+ Years Virtual Interview | Java Developers kzbin.info/www/bejne/jZ7bnYGmest_ZpY

[@coincidentIndia]

why using reducing ? we can directly use the maxBy on groupBy DepartmentId. Map maxSalaryByDept = employeeList.stream().collect(Collectors.groupingBy(Employee::getEmployeeDepartmentId, Collectors.maxBy(Comparator.comparing(Employee::getSalary)))); maxSalaryByDept.forEach((k,v)->{System.out.println("Dept "+k+" Salary "+v);});