package Good.com;
import
java.util.ArrayList;
public class Prog23 {
static int op;
public static void abc(String str)
{
ArrayList<Character>
al = new ArrayList<Character>();
ArrayList<Character>
al1 = new ArrayList<Character>();
int i, j, count =
0;
for (i = 0; i <
str.length(); i++) {
if (str.charAt(i)
!= '
')
{
al.add(str.charAt(i));
}
}
for (i = 0; i <
al.size(); i++) {
count
= 0;
if (al.get(i) != '*') {
for (j = i + 1; j
< al.size(); j++) {
if (al.get(i) ==
al.get(j)) {
al.set(j, '*');
count++;
}
}
if (count == 0)
al1.add(al.get(i));
}
}
op = al1.size();
}
public static void main(String[]
args) {
String
str = "Hello World";
abc(str);
System.out.println(op);
}
}