Frequently Asked Java Program 26: How To Count Occurrences of a Character in a String

Topic : How To Count Occurrences of a Character in a String

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[shakulhameed]

we simply sovle the problem like
int count =s.replaceAll("[^a]", "").length();

[Himu]

Amazing video sir ! You code in such simple way and explain it so well that any basic /intermediate base person can fully grasp the concept and learn coding.

[CareerHirings]

why writing this much complex...i dont

we can write in this way too

String s="yash is a good boy ";
char comp='a';
int flag=0;
for(int i=0;i<s.length();i++){
if(s.charAt(i)==comp){
flag++;
}
}
System.out.println(flag);

[nayabshaik]

I was very scary to make understand coding earlier. But once I started watching your videos, my thought process changed.
I am very comfortable to understand your logics, I feel like "OH CODING IS SUCH SIMPLE" 😄🤣
Great Thank you Pavan sir..🤝🤝🙏🙏

[akadeadahot]

this method is also easy check it guys'
String str="java programming is very easy";
int count=0;


for(int i=0;i<str.length();i++) {
if(str.charAt(i)=='a') {
count++;
}
}


System.out.println("number of occurances letter a :"+count);
try this one also easy and thank u sir for these videos

[rameshtirneddi]

if we get string from the user then how to get max occuring character

[abinayabala]

can u tell me how to check for all the character occurence

[nibopip]

Superb easy to understand sir...thanks a lot for helping us.

[pakkaandhrapori]

Thanks for easy explanation and can we do the same program without "replace" method? please explain the approach as well

[emmadivamshi]

Sir Your explanation is very nice and am very thankful to you sir

[Shreenidhi]

Thank you so much, very easy way to understand

[swayamprakashbhuyan]

Love your videos and commenting for better reach. You have a great voice btw.

[hemrajpatil]

very easy sir.thank u. sir can u please make programm for prime no. from array ..please sir .

[udaybenake]

This is working but does not count uppercase characters if we are pass lowercase or vice versa

[rizwanreshi]

Sir what about when there are same letter with upper and lower case.

[vithvishnu]

Can i get this in loop.. if yes can u comment the statement..

[rrwhoee]

hi sir can we use this method is scanner sirif yes can u tell me how to use it

[vikramsinghyadav]

Sir we can use Hashmap that would be more efficient

[MAGAVISHNUT]

This for known statement.. Then what is code for when we use scanner Class

[tejajami]

import java.util.Arrays;

class OccrenceOfInputArray {

public static void main(String[] args) {
int arr[] = {1, 1, 2, 2, 3, 4, 5, 6, 8, 9};
int len = arr.length;
System.out.println("Total length: " + len);

String arrString = Arrays.toString(arr);

// Replace '2' with an empty string and get the length
int totalCount = len - arrString.replace("2", "").length();
System.out.println("Total count of 2: " + totalCount);
}
}



sir, while im running this program after removing the 2 we got the output is 8, but here output is getting is: clarify this doubt sir