Kurssisisältö
Stream API
Stream API
1. Fundamentals and Functional Capabilities of Stream API
ArchitecturePrinciplesWhat Is a Functional Interface?Predicate: Data FilteringChallenge: Filtering Corporate Email AddressesFunction: Data TransformationChallenge: Income Tax CalculationComparable: Natural Ordering of DataComparator: Custom Comparison of DataChallenge: Sorting Employees Consumer: Processing Data Supplier: Data GenerationBi-versions of Functional InterfacesChallenge: Filtering Users by Two CriteriaBinaryOperator: Combining Two Values
2. Intermediate Operations in Stream API
Transforming Elements with the map() MethodFiltering Elements with the filter() MethodChallenge: Factory Product FilteringWorking with Nested Structures with the flatMap() MethodArranging Items in Order with the sorted() MethodChallenge: Selecting the Best Cars on the Production LineEliminating Duplicates with the distinct() MethodChallenge: Factory Quality ControlRestricting and Skipping Elements with the limit() and skip() MethodsChallenge: Finding the Top 3 Hardest-Working EmployeesIntermediate Processing with the peek() Method
3. Terminal Operations in the Stream API
collect() Gathering Stream Elements into a CollectionChallenge: Build a Custom Collector for Category CountingCollectors Utility Class for Stream APIProcessing Elements with the forEach() MethodHandling Values with the Optional ClassAggregating Elements with the reduce() MethodChallenge: Calculating Total Cost with Discounts and TaxCalculating Stream Statistics with count(), max(), and min()Retrieving Stream Summary Metrics with summaryStatistics() MethodRetrieving Elements from a Stream with findFirst() and findAny()Challenge: Selecting Random Products Within a CategoryChecking Stream Elements Against a Condition with allMatch()Challenge: Ensuring Fast Delivery for Expensive Products
4. Practical Applications of Stream API
Challenge: Filtering Corporate Email Addresses
Tehtävä
Swipe to start coding
You have a list of employee email addresses, and you need to keep only the corporate emails (those ending with @company.com).
- Implement a
Predicateto filter corporate emails that end with@company.com. - Pass the correct parameters to the
filterEmailsmethod. - In the
filterEmailsmethod, iterate through all email addresses using afor-eachloop. - Apply the
Predicatein theifcondition. - Add the matching emails to the new list
result.
Ratkaisu
solution
Vaihda työpöytään todellista harjoitusta vartenJatka siitä, missä olet käyttämällä jotakin alla olevista vaihtoehdoistaOliko kaikki selvää?
Kiitos palautteestasi!
Osio 1. Luku 5
Challenge: Filtering Corporate Email Addresses
Tehtävä
Swipe to start coding
You have a list of employee email addresses, and you need to keep only the corporate emails (those ending with @company.com).
- Implement a
Predicateto filter corporate emails that end with@company.com. - Pass the correct parameters to the
filterEmailsmethod. - In the
filterEmailsmethod, iterate through all email addresses using afor-eachloop. - Apply the
Predicatein theifcondition. - Add the matching emails to the new list
result.
Ratkaisu
solution
Vaihda työpöytään todellista harjoitusta vartenJatka siitä, missä olet käyttämällä jotakin alla olevista vaihtoehdoistaOliko kaikki selvää?
Kiitos palautteestasi!
Osio 1. Luku 5
Vaihda työpöytään todellista harjoitusta vartenJatka siitä, missä olet käyttämällä jotakin alla olevista vaihtoehdoista