This page contains book marks with quite minimal details.
Author shows basic information you may interested in knowing the default capacity of few of datastructurs.
https://www.quora.com/What-is-a-default-capacity-of-ArrayList-Vector-HashMap-Hashtable-and-Hashset
Author gives clear picture of load factor in hashmap, he is even talking about "rehashing" .
http://javaconceptoftheday.com/initial-capacity-and-load-factor-of-hashmap-in-java/
There are various ways of implementing singleton design pattern, each has their merits and demerits, so learn what is best way to implement singleton pattern in java.
https://www.journaldev.com/1377/java-singleton-design-pattern-best-practices-examples
To achieve good understanding on WeakHashmap and concurrenthashmap
http://java-career.blogspot.com/2012/07/weakhashmap-and-concurrenthashmap.html
This site has quick handy questions and answers for core java interview.
http://java-questions.com/
Author shows basic information you may interested in knowing the default capacity of few of datastructurs.
https://www.quora.com/What-is-a-default-capacity-of-ArrayList-Vector-HashMap-Hashtable-and-Hashset
Author gives clear picture of load factor in hashmap, he is even talking about "rehashing" .
http://javaconceptoftheday.com/initial-capacity-and-load-factor-of-hashmap-in-java/
There are various ways of implementing singleton design pattern, each has their merits and demerits, so learn what is best way to implement singleton pattern in java.
https://www.journaldev.com/1377/java-singleton-design-pattern-best-practices-examples
To achieve good understanding on WeakHashmap and concurrenthashmap
http://java-career.blogspot.com/2012/07/weakhashmap-and-concurrenthashmap.html
This site has quick handy questions and answers for core java interview.
http://java-questions.com/
Well explained . Great article on singleton pattern . There is also good singleton pattern example visit Singleton class example
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