Core java - Advance Topics
  • Welcome
  • Schedule
  • 1) Exception Handling
    • 1) Introduction to Exception Handling
    • 2) Categories of Exceptions
    • 3) Creating a method that throws an exception
    • 4) Creating Custom Exception Classes
    • 5)What happens when an exception is thrown?
      • 5.1) Creating try-catch-finally blocks
      • 5.2) Using a method that throws a checked exception
      • 5.3) Using a method that throws a runtime exception
      • 5.4) Using a method that throws an error
      • 5.5) Will a finally block execute even if the catch block defines a return statement?
      • 5.6) What happens if both a catch and a finally block define return statement?
      • 5.7) What happens if a finally block modifies the value returned from a catch block?
      • 5.8) Can a try block be followed only by a finally block?
      • 5.9) Does the order of the exceptions caught in the catch blocks matter?
      • 5.10) Can I rethrow an exception or the error I catch?
      • 5.11) Can I declare my methods to throw a checked exception instead of handling it?
      • 5.12) I can create nested loops, so can I create nested try-catch blocks too?
      • 5.13) Should I handle errors?
    • 6) Best Practices
    • 7) Cheat Sheet
    • 8) Problems
  • 2) Wrapper Classes and Enums
    • 2.1) Creating objects of the wrapper classes
    • Enums
  • 3) Inner Classes
    • 3.1) Static nested class (also called static inner class)
    • 3.2) Inner class (also called member class)
    • 3.3) Anonymous inner class
    • 3.4) Method local inner classes
    • CheatSheet
  • 4) Generics
    • Multiple Type parameters in Generic classes
    • Inheritance using Generics
    • Generic interfaces
    • Generic Methods
    • Bounded type parameters
    • Applications
  • 5) Equals and Hashcode
    • Problems
  • CompareTo method overview
  • Basic DS
    • 1) Simple Array List
    • 2) Simple HashMap
  • 5) Collections Framework - Part 1
    • Introducing the collections framework
    • Working with the Collection interface
      • The core Collection interface
      • Methods of the Collection interface
    • Creating and using List, Set, and Deque implementations
      • List interface and its implementations
      • Iterators
      • Sorting List using custom sorting technique
      • Comparable Interface
      • Custom Sorting using comparator
      • ArrayList - Examples and practice problems
    • Stack
    • Linked List
    • LinkedList Operations
  • 6) Collections Framework - Part 2
    • Sets
      • Set Types
      • Array to Set (vice versa)
    • Maps
    • TreeMap
    • Autoboxing And Unboxing
  • Collections Framework - Part 3
    • Basics : DS , Number System
    • Internal Working
      • HashMap
      • HashSet
  • 7) Reflection API
  • 8) Annotations
  • 9) Reading Input From Various Sources
    • File Handling
    • Reading From Xml
    • Reading From JSON
  • 10) Multi-threading (Concurrency)
    • Protect shared data
    • Thread-safe access to shared data
  • 11) Design Patterns
    • Singleton
    • DI
  • 12) Internal Working of JVM
  • 13) Garbage Collection
  • 14) More on Strings (Buffer and Builder)
  • 15) Cloning and Immutable Class
    • 16) Serialization And Deserialization
    • Untitled
  • JAVA 8
    • Interface Changes
    • Lambda
    • Method Ref
    • Optional
    • Streams
    • Predicates
  • Practice Tests
    • Test - Collections
    • OOPS
    • S-OOPS
Powered by GitBook
On this page

Was this helpful?

  1. 5) Collections Framework - Part 1
  2. Working with the Collection interface

Methods of the Collection interface

PreviousThe core Collection interfaceNextCreating and using List, Set, and Deque implementations

Last updated 5 years ago

Was this helpful?

Figure below shows the methods of the Collection interface, grouped by their functionality: methods that modify Collection, methods that query it, and miscellaneous.

Because most of the interfaces implement the Collection interface, most of the imple- mentation classes include methods to add, remove, and query its elements and retrieve an Iterator to retrieve the collection elements. The implementation, though, varies across classes.

As you proceed and work with the implementation of classes in the collection framework, you’ll notice that almost all the classes mention that the Iterator returned by method iterator() is fail-fast. This implies that if you try to modify the structure of a collection by adding or removing elements from it, after the Iterator is created, the Iterator will throw the exception ConcurrentModificationException. But this doesn’t happen if you modify the collection by using the Iterator’s own add or remove methods. This important behavior prevents collections from returning arbitrary values during concurrent access.

As we move on to the next section to discuss more interfaces (namely, Set, List, and Deque), you’ll notice how each of them might suggest a different implementation of the methods from the Collection interface, to support the specific data structure that they represent.

Methods defined in the Collection interface, grouped by their functionality