Design the static method below to count and return the frequency of each digit in the array of strings.

public static int [ ] countFreq (String [ ] strings);

in order to find the frequency of characters in an alphabet, we do this; i want to know how to count the frequency of the digits using that static method. The program should be really simple.

//example: x = "abcabcABDEFabc0123A"

public class Q4

{

public static int [ ] count (String x)

{

int [ ] counters = new int [52];

for (int i = 0; i < 52; i++)

counters[i] = 0;

int len = x.length ( );

for (int i = 0; i < len; i++)

{

char c = x.charAt(i);

if ((c >= 'A') && (c <= 'Z'))

counters[c - 65]++;

else if ((c >= 'a') && (c <= 'z'))

counters[c - 71]++;

}

return counters;

}

}