Category: Java Interview Questions
Java Constructor Tutorial – Why do we need Constructors ?
In this article we will discuss need and usage details of constructors in Java. What is a Constructor ? Constructor is a member function of the class that is used to initialize a newly constructed object i.e. initializing the member variables of object. Advertisements It has the same name as of the class. Why do …
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Java: How to get all keys by a value in HashMap ? | Search by Value in Map
In this article we will discuss how to search into a Map by value and fetch associated keys to the given value. Suppose we have a map of string and integers i.e. Advertisements HashMap<String, Integer> mapOfWords = new HashMap<String, Integer>() { { put(“John”, 25); put(“at”, 2); put(“from”, 10); put(“is”, 5); put(“the”, 2); put(“hello”, 1); put(“break”, …
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