Frequently Asked Java Program 08: Program to find occurrence of individual characters in a given string.

Hello Folks,

As part of Frequently Asked Java Programs In Interviews For Freshers And Experienced, in this post we will learn to develop a java program to find out occurrence of individual characters in a given string.

Logic:

    1. To get input from user, we will use Scanner class.
    2. We will use Map interface concept here which deals in key-value pair.
    3. We will convert given string in to a char array.
    4. We will iterate char array index by index and will add in to Map if char does not exist already. If it exists we will increase value by one.

Java Program:

Output:

Please provide a string to get count of characters:
Amod Mahajan
White space = 1
a = 4
d = 1
h = 1
j = 1
m = 2
n = 1
o = 1
Duplicate characters are:
a
m

======================================================================

Please provide a string to get count of characters:
Make Selenium Easy
White space = 2
a = 2
s = 2
e = 4
u = 1
i = 1
y = 1
k = 1
l = 1
m = 2
n = 1
Duplicate characters are:
a
s
e
m

If you have nay doubt or suggestions feel free to comment.
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Author: Amod Mahajan

My name is Amod Mahajan and I am an IT employee with 6+ years of experience in Software testing and staying in Bengaluru. My area of interest is Automation testing. I started from basics and went through so many selenium tutorials. Thanks to Mukesh Otwani as his tutorials are easy and cover basics to advance. I have habit of exploring concepts by deep diving. I used to make notes. I thought of sharing my knowledge through posts and now I am here. #KeepLearning #ShareLearning

4 thoughts on “Frequently Asked Java Program 08: Program to find occurrence of individual characters in a given string.

  1. Longest pallindromic Substring ? Program can you pls share bro ?

    Ex : aabbracecardadmom

    in the above ex longest pallindromic substring is racecar.

    Can you pls share the code for that bro ? It will be helpful thanks.

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