Write a program to sort Map based on value in java .
Ravi Pratap Srivastav
March 01, 2018
To Sort the Map based on the value, we can use following ways to solve the problem. These are 1. By Using TreeMap with ...
1 Mar 2018
Collection
Collection
28 Feb 2018
Collection
Collection
Write a program to sort a Map by Key in java.
Ravi Pratap Srivastav
February 28, 2018
To sort the Map based on the key we can use following methods. these are.. 1. Using TreeMap 2. Using Comparator 3. ...
13 Feb 2018
Collection
Collection
Difference between CopyOnWriteArraySet and synchronizedSet().
Ravi Pratap Srivastav
February 13, 2018
Collection
Collection
Difference between ArrayList and CopyOnWriteArrayList.
Ravi Pratap Srivastav
February 13, 2018
Collection
Collection
Difference between HashMap and ConcurrentHashMap.
Ravi Pratap Srivastav
February 13, 2018
3 Jan 2018
Collection
Collection
How HashMap internally works.
Ravi Pratap Srivastav
January 03, 2018
HashMap works internally has become a popular question in almost all the interview now a days for fresher as well as experience people.so ...
24 Dec 2017
Collection
Collection
Properties comparison among Collection classes.
Ravi Pratap Srivastav
December 24, 2017
Lets have a look to make easy comparison among the Collection classes based on some important properties.
23 Dec 2017
Collection
Collection
What is diiference between HashMap and ConcurrentHashMap?
Ravi Pratap Srivastav
December 23, 2017
HashMap ConcurrentHashMap HashMap is not thread safe. ConcurrentHashMap is Thread safe . Relatively...
Collection
Collection
What is cursor in java and its type ? What is difference among Enumeration, Iterator, ListIterator?
Ravi Pratap Srivastav
December 23, 2017
Cursor: cursor is used to iterate over collection items. means if we want to get objects one by one from the collection then we should ...
11 Dec 2017
Collection
Collection
write a program in java to Implementing our own Custom Iterator of ArrayList.
Ravi Pratap Srivastav
December 11, 2017
To create our own custom iterator we have to follow these steps, which are described below.
6 Dec 2017
Collection
Collection
write a program in java to get the size of ArrayList without using size() method.
Ravi Pratap Srivastav
December 06, 2017
To get the size of ArrayList we can use the library method size() ,but here requirement is not to use the size() method. so that we can...
Collection
Collection
What is difference between double equal operator and .equals() method ?
Ravi Pratap Srivastav
December 06, 2017
Collection
Collection
what is difference between HashMap and Hashtable ?
Ravi Pratap Srivastav
December 06, 2017
Collection
Collection
What is difference between Comparable and Comparator?
Ravi Pratap Srivastav
December 06, 2017
Comparable Comparator Comparable meant for default natural sorting order. Comparable meant for customized sort...
Collection
Collection
what is difference between ArrayList and Vector ?
Ravi Pratap Srivastav
December 06, 2017
ArrayList Vector Every Method Present Inside ArrayList is Non – Synchronized. Every Method Present in Vector is Sy...
Collection
Collection
what is difference between Arrays and Collection?
Ravi Pratap Srivastav
December 06, 2017
Arrays Collection Arrays are Fixed in Size. Collection are Grow able in Nature. With Respect to Memory Arr...
5 Dec 2017
Collection
Collection
Write a program in java to check parenthesis validation through Stack.
Ravi Pratap Srivastav
December 05, 2017
Collection
Collection
write a program in java to find first non repeating character from a given string.
Ravi Pratap Srivastav
December 05, 2017
To find the first non-repeating character from given string,we will put the all character based on their frequency into HashMap and we ...
