Explore various techniques for iterating through a List of Maps in Java.
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Collecting into Map using Collectors.toMap() vs Collectors.groupingBy()
Learn about the difference between toMap and groupingBy when collecting a Java Stream into a Map.
Get the Position of Key/Value in LinkedHashMap Using Its Key
Explore different approaches to getting the position of a key value within a LinkedHashMap in Java.
Casting Maps to Complex Objects
Learn how to convert a Map to an Object or POJO in Java.
Mapping Enum to String Using MapStruct
A quick tutorial on using MapStruct to convert enums to strings.
Using MapStruct With Inheritance
Learn how to use the Mapstruct mappers with inherited Java bean classes.
Create HashMap with Character Count of a String in Java
Learn how to create a HashMap with a string’s character count.
Mapping Enum With MapStruct
Learn to map between enum types and other data types like strings or integers using MapStruct’s @ValueMapping
Find Map Keys with Duplicate Values in Java
Learn how to find map keys associated with duplicate values in Java.
Flatten a Stream of Maps to a Single Map in Java
Learn to combine a stream of maps into a single result map in Java.
How to Pretty-Print a Map in Java
Learn different approaches for pretty-printing maps in Java.
Collect Stream of entrySet() to a LinkedHashMap
Explore various ways to collect a stream of Map.Entry objects into a LinkedHashMap.
CountDownLatch vs. Semaphore
Explore the differences between CountDownLatch and Semaphore and discuss when to use each.
Return Map Instead of List in Spring Data JPA
Learn how to use custom collections as return types in Spring Data JPA make the design more straightforward and less cluttered with mapping and filtering logic.
How to Increment a Map Value in Java
Explore several ways to increment the value of a Map entry.
How to Sort LinkedHashMap by Values in Java
Explore how to sort a LinkedHashMap by values in Java.
Limiting the Max Size of a HashMap in Java
In this tutorial, we learn how to limit the number of entries in a HashMap.
Asserting Nested Map With JUnit
Learn the different ways of asserting the presence of a nested map with JUnit.
How to Parse XML to HashMap in Java
Learn different ways to parse XML into a HashMap, a data structure that allows for efficient data retrieval and manipulation.
Convert ResultSet Into Map
Learn to convert a ResultSet in to a HashMap in Java.