Find the occurrence of Each character in an Given String

This Java code will Print the number of occurrence for all unique character in the given String

Input - Test@Tutor
Output  -
Occurrence of char [t] - 4
Occurrence of char [e] - 1
Occurrence of char [s] - 1
Occurrence of char [@] - 1
Occurrence of char [u] - 1
Occurrence of char [o] - 1
Occurrence of char [r] - 1


CODE -

public class CountCharOccurance
{
public static void main(String[] args)
{
String value = "Test@Tutor";

int[] count = new int[256];

value = value.toLowerCase();

for (int i = 0; i< value.length(); i++)
{
count[(int)value.charAt(i)]++;
}

List<Character> printed = new ArrayList<Character>();

for (int i = 0; i< value.length(); i++)
{
if (printed.contains(value.charAt(i)))
continue;

printed.add(value.charAt(i));

System.out.println("Occurrence of char [" + value.charAt(i) + "] - " + count[(int)value.charAt(i)]);
}
}

}