6 Questions
What is a Collection in Java?
A group of objects
Which interface is the root interface of the Java Collection framework?
Collection
What is the key difference between List and Set in Java Collections?
List allows duplicate elements, Set doesn't
What is the key characteristic that distinguishes a Set from a List in Java Collections?
Sets maintain elements in insertion order
Which interface in Java Collection framework extends the Collection interface and allows the removal of elements while iterating?
Queue
Which method in the Collection interface is used to check if a collection is empty?
isEmpty()
Study Notes
Java Collection Framework
- A Collection in Java is a group of objects that can be manipulated independently.
Collection Interface
- The root interface of the Java Collection framework is Collection.
List and Set
- The key difference between List and Set in Java Collections is that List is ordered and allows duplicates, while Set is unordered and does not allow duplicates.
Set Characteristics
- The key characteristic that distinguishes a Set from a List in Java Collections is that Set does not allow duplicates.
Iteration and Removal
- The Iterator interface in Java Collection framework extends the Collection interface and allows the removal of elements while iterating.
Checking Emptiness
- The isEmpty() method in the Collection interface is used to check if a collection is empty.
Test your knowledge of Java Collections with this quiz! Explore the definition of Collections in Java, learn about the root interface of the Java Collection framework, and understand the differences between List and Set in Java Collections.
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