Answer:
import java.util.*;
public class work {
// function for counting unique character
public static int numUnique(String input) {
boolean[] list = new boolean[Character.MAX_VALUE];
for (int i = 0; i < input.length(); i++) {
list[input.charAt(i)] = true;
}
int count = 0;
for (int i = 0; i <list.length; i++) {
if (list[i] == true){
count++;
}
}
return count;
}
public static void main(String args[])
{
List<String>list=new ArrayList<>(); // creatng array list of type string
list.add("abcdef");
list.add("aaabcd");
list.add("bccddee");
list.add("abcddd");
list.add("a");
for(String str:list)
{
// for printing the results
System.out.println("given string : "+ str+" , number of unique values :"+numUnique(str));
}
}
}
Explanation:
