Question

Write the body of method called maxFrequency:

public static char maxFrequency(String s){

which takes a string (length >=1) as parameter (containing characters from a to z; only small caps), calculates frequencies of characters in the string and returns the character with maximum frequency. For example, if the parameter string is "abcabcabca", the method returns 'a'.

Answer 1

public class Main {

public static void main(String[] args)
{
//Sample string
String str = "HJDKASDKSHDSHDKJASJDKASJDKJSKDJASKDJKASJDKASJDKLJASDKSDJKSJDKJASKDJSKJDKSADJKLS";
System.out.println(maxFrequency(str));

}
public static char maxFrequency(String s){
int[] counters = new int[28];

//Get the ASCII code of A
int ia = (int)'A';
for (char c : s.toCharArray())
{
int ic = (int)c;
counters[ic - ia]++;
}

int max=counters[0];

for (int i = 0; i < 28; i++){
if(counters[i]>max){
max=counters[i];

}
}
char letter=' ';
for (int i = 0; i < 28; i++){
if (counters[i] > 0 && counters[i]==max)
{
letter=(char)(ia + i);
}
}
return letter;
}

}