Collections in Java: Sets & Maps
Java
| Intermediate
- 15 videos | 1h 38m 32s
- Includes Assessment
- Earns a Badge
The Java collections framework has several different, specialized collections, such as sets and maps. These allow you to store values and data in different ways. In this course, you'll explore these and other valuable collections from the Java collections framework. Create and work with sets, performing several different operations, including union, intersection, difference, and subset operations. Next, explore the different set implementations that Java offers beyond the basic HashSet. Discover how the LinkedHashSet and TreeSet differ in how elements of the set are accessed. Finally, work with another important and commonly used Java collection, the map. Investigate several different map implementations and use maps to build a Least Recently Used cache and a priority queue. When you're finished, you'll have a solid foundational, working knowledge in using special collections in the Java collections framework.
WHAT YOU WILL LEARN
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Discover the key concepts covered in this course
Explore the basic characteristics of the 'set' data structure
Recall how hash sets identify duplicates
Recall how different types of sets are ordered
Implement tree sets for predictable ordering of data
Identify how the comparator and comparable interfaces are used in tree sets
Store key-value pairs in maps
View keys and values in maps as collections -
Create dictionaries with keys and values of custom types
Recognize different type of map implementations
Implement an lru cache using a linkedhashmap
Implement the comparator interface to access elements in a tree map in priority order
Implement the comparable interface to access elements in a tree map in priority order
Recall the special operations that can be performed on sorted maps
Summarize the key concepts covered in this course
IN THIS COURSE
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2m 15s
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10m 11s
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3. Identifying Duplicates in a HashSet9m 25s
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4. Ordering Elements in Set Implementations6m 44s
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5. Using Comparators in Tree Sets6m 19s
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6. Using Comparables and Comparators in Tree Sets10m 4sIn this video, you'll learn how to identify how the Comparator and Comparable interfaces are used in tree sets. You'll discover that if you want to be able to add custom Objects to TreeSets, your Objects should implement the Comparable interface or you need to specify a Comparator for the TreeSet. FREE ACCESS
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7. Carrying Out Map Operations8m 47s
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8. Working with Collection Views on a Map6m 41s
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9. Using Custom Objects as Keys and Values6m 7s
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10. Ordering Entries in Map Implementations4m 14s
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11. Implementing an LRU Cache Using LinkedHashMap8m 24s
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12. Using TreeMaps and Comparators7m 15s
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13. Using TreeMaps and Comparables6m 7s
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14. Performing Sorted Map Operations3m 55s
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15. Course Summary2m 5s
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