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June 27, 2021 Ravi Yasas
List vs Queue vs Set vs MapListQueueSetMapDuplicatesYesYesNoNo(Allow duplicate values not keys)OrderYesYesNoNoNull valuesYesPriority queue doesn't allow, but queue using LinkedList allows nullSingle nullSingle null key and many null valu...
beginners / coding / collection framework / collections / learning / list / map / queue / set / tutorial
June 27, 2021 Ravi Yasas
HashMap vs HashTable HashMapHashTableNot synchronizedSynchronizedAllows one null key and many null valuesDoesn't allow null valuesNo orderLinkedHashMap - Insertion orderTreeMap - order by keysNo orderNo duplicatesNo duplicat...
June 27, 2021 Ravi Yasas
ArrayList vs LinkedList vs Vector ArrayListLinkedListVectorData structureIndex-based dynamic arrayDoubly linked listGrowable arrayIncrement size50%No initial size100%Traverse Uses iteratorUses iteratorUses enumerationMemory usageLess memory usageMore memory usageAccessibilityRandom...
array / arraylist / beginner / collection framework / collections / devloper / typesafety / vector
June 27, 2021 Ravi Yasas
ArrayArrayListFixed-sizeSize is not fixedNot type-safeType-safeAllow both primitives and objectsDoesn't allow primitives. But after Java 5 auto-boxing will convert primitives to objectsType safety means the compiler will validate the types while compiling and throw an error if you do anything...
array / arraylist / beginner / collection framework / collections / devloper / typesafety
June 26, 2021 Ravi Yasas
Streams vs CollectionsCollectionsStreamsThe collections are used to store & group data in data structures like List, Set, Map...etc.Streams are used to perform complex operations like filtering, matching, mapping, etc... on stored dataData modification can be done. You can add or remove data...
beginners / collection framework / collections / java 8 / learning / stream / streams / tutorials
@OneToOne The best approach to bidirectional @OneToOne is to use @MapsId Student entity @Entity @Data @Table(name = "students") pu...
