Write a program to find duplicate characters in a given string and print the count of each character.

Question

Accepted Answer

Program to count duplicates in a string using Java

Accepted Answer

in java, using a hashmap we can count the occurances as well as get the unique ones while doing so.

String str = "SoommeeString";

HashMap hm = new HashMap<>();

for(int i=0;i

hm.put(str.charAt(i),hm.getOrDefault(str.charAt(i),0)+1);

}

//traversing through the map will give dupliactes and their counts.

for(char i : hm.keySet()){

if(hm.get(i)>1){System.out.println(i+"has a count of " + hm.get(i));}

}

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