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package challenge06;

import java.util.LinkedHashMap;

import java.util.Map;

import org.junit.Test;

/**

* The Class Challenge06.

*

* find duplicate characters in a String.

* You need to write a program to print all duplicate character

* and their count in Java. For example if given String

* is "Programming" then your program should print

* g : 2

* r : 2

* m : 2

*/

public class Challenge06 {

public static void printduplcatesWithCount(String input) {

Map<Character, Integer> counter=new LinkedHashMap<Character, Integer>();

for(int i=0;i<input.length()-1;i++) {

Integer oldvalue=counter.put(input.charAt(i), 1);

if(oldvalue!=null) {

counter.put(input.charAt(i), oldvalue+1);

}

}

counter.forEach((k,v)-> System.out.println(k +" :" + v));

}

@Test

public void test() {

Challenge06.printduplcatesWithCount("{Programming");

}

}