Find Duplicate String in Java

package com.practice.basic;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

public class FindDupString {

public void findDuplicate(String str) {

Map<Character, Integer> map  = new HashMap<>();

char[] name = str.toCharArray();

for(Character ch:name)
{
if(map.containsKey(ch))
{
map.put(ch, map.get(ch)+1);
}
else
{
map.put(ch, 1);
}
}
Set<Character> set = map.keySet();

for(Character ch1:set)
{
if(ch1 > 1)
{
System.out.println("char "+ch1+" "+map.get(ch1));
}
}

}

public static void main(String[] args) {
// TODO Auto-generated method stub
FindDupString findDupString = new FindDupString();
System.out.println("String is : maddy");
findDupString.findDuplicate("maddy");

}

}


Output :

String is : maddy
char a 1
char d 2
char y 1
char m 1