Highest Occuring Character

 

For a given a string(str), find and return the highest occurring character.

Sample Input 1:

abdefgbabfba

Sample Output 1:

b

Approach 1 -

import java.util.Scanner;

public class HighestOccurence {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		String st = s.nextLine();
		char c = highestOccuringChar(st);
		System.out.println(c);

	}

	public static char highestOccuringChar(String str) {
		
		
		char chh=' ';
		int max=0;
		int l=str.length();
		for(int i=97;i<=122;i++)
		{
			int c=0;
			char ch1=(char)i;
			for(int j=0;j<l;j++)
			{
				char ch=str.charAt(j);
				if(ch1==ch)
				{
					c++;
				}
			}
			if(c>max)
			{
				max=c;
				chh=ch1;
			}
			
		}
		
		return chh;
}
}

Approach 2 -

public class Solution {

	public static char highestOccuringChar(String str) {

        int N = 256;
        int ctr[] = new int[N];
  int l = str.length();
  for (int i = 0; i < l; i++)
   ctr[str.charAt(i)]++;
  int max = -1;
  char result = ' ';

  for (int i = 0; i < l; i++) {
   if (max < ctr[str.charAt(i)]) {
    max = ctr[str.charAt(i)];
    result = str.charAt(i);
   }
  }

  return result;

}
}