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Core Java Collections Cookbooks and Examples
Relevant Articles:
- Immutable ArrayList in Java
 - Guide to the Java ArrayList
 - Random List Element
 - Java - Combine Multiple Collections
 - Removing all nulls from a List in Java
 - Removing all duplicates from a List in Java
 - Flattening Nested Collections in Java
 - HashSet and TreeSet Comparison
 - Collect a Java Stream to an Immutable Collection
 - Introduction to the Java ArrayDeque
 - A Guide to HashSet in Java
 - A Guide to TreeSet in Java
 - How to TDD a List Implementation in Java
 - Getting the Size of an Iterable in Java
 - Iterating Backward Through a List
 - How to Filter a Collection in Java
 - Add Multiple Items to an Java ArrayList
 - Remove the First Element from a List
 - Initializing HashSet at the Time of Construction
 - Removing the First Element of an Array
 - Fail-Safe Iterator vs Fail-Fast Iterator
 - Shuffling Collections In Java
 - How to Find an Element in a List with Java
 - An Introduction to Java.util.Hashtable Class
 - Copy a List to Another List in Java
 - Finding Max/Min of a List or Collection
 - Java Null-Safe Streams from Collections
 - Remove All Occurrences of a Specific Value from a List
 - Thread Safe LIFO Data Structure Implementations
 - Collections.emptyList() vs. New List Instance
 - Differences Between Collection.clear() and Collection.removeAll()
 - Performance of contains() in a HashSet vs ArrayList
 - Time Complexity of Java Collections
 - Operating on and Removing an Item from Stream
 - An Introduction to Synchronized Java Collections
 - Guide to EnumSet
 - Removing Elements from Java Collections
 - Converting a Collection to ArrayList in Java
 - Java 8 Streams: Find Items From One List Based On Values From Another List
 - Combining Different Types of Collections in Java
 - Sorting in Java
 - A Guide to the Java LinkedList
 - Java List UnsupportedOperationException
 - Join and Split Arrays and Collections in Java
 - Check If Two Lists are Equal in Java
 - Java List Initialization in One Line
 - ClassCastException: Arrays$ArrayList cannot be cast to ArrayList
 - A Guide to EnumMap