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Q1. Difference between TreeMap and HashMap ?

Core Java

Ans. They are different the way their elements are stored in memory. TreeMap stores the Keys in order whereas HashMap stores the key value pairs randomly.

Sample Code for treemap

Sample Code for hashmap

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Related Questions

Which of the following collections stores its elements in insertion Order ?

a. HashMap
b. TreeMap
c. LinkedHashMap
d. LinkedMap

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Which are the sorted collections ?

How can we reverse the order in the TreeMap ?

TreeMap orders the elements on which field ?

How TreeMap orders the elements if the Key is a String ?

Can we add heterogeneous elements into TreeMap ?

Will it create any problem if We add elements with key as user defined object into the TreeMap ?

Q2. Define Collection

Core Java

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