Program to find the frequency of characters in given string in java

Program to find the frequency of characters in given string in java 

For Explanation Watch Video :

Code::

import java.util.*;

import java.io.*;

import java.lang.*;

class Test{

public static void main(String[] args) {

String name = "idiot";

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

for(int i=0;i<name.length();i++){

Character ch = name.charAt(i);

map.put(ch,map.getOrDefault(ch,0)+1);

}

System.out.println(map);

for(Map.Entry<Character,Integer> e : map.entrySet()){

System.out.println(e.getKey()+" "+e.getValue());

}

}

}

o/p:

{d=1, t=1, i=2, o=1}

d 1

t 1

i 2

o 1