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Stream API
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Course Content

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
Real-World Examples of Using Stream APIPerformance in Stream APIException Handling in Stream APISummary

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Challenge: Filtering Users by Two Criteria

Task

Swipe to start coding

Filter the users who are over 18 years old and have an "Active" status, then print them to the screen.

  1. Create a BiPredicate to check if age is greater than 18 and status is "Active".
  2. Inside forEach(), use the if statement to evaluate the user based on the BiPredicate.
  3. If the user satisfies the condition, print the user to the console.

Solution

java

solution

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Section 1. Chapter 14
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book
Challenge: Filtering Users by Two Criteria

Task

Swipe to start coding

Filter the users who are over 18 years old and have an "Active" status, then print them to the screen.

  1. Create a BiPredicate to check if age is greater than 18 and status is "Active".
  2. Inside forEach(), use the if statement to evaluate the user based on the BiPredicate.
  3. If the user satisfies the condition, print the user to the console.

Solution

java

solution

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 1. Chapter 14
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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