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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. /* Name of the class has to be "Main" only if the class is public. */
  6. class Ideone
  7. {
  8. 	public static void main (String[] args) throws java.lang.Exception
  9. 	{
  10. 		// your code goes here
  11. 		String[] words=new String[]{"bella","label","roller"};
  12. 		String str=words[0];
  13.         Map<Character,Integer>hmap=new HashMap<>();
  14.         for(int i=0;i<str.length();i++){
  15.             char c=str.charAt(i);
  16.             hmap.put(c,hmap.getOrDefault(c,0)+1);    
  17.         }
  18.         for(int i=1;i<words.length;i++){
  19.             String newstr=words[i];
  20.             Map<Character,Integer>freqmap=new HashMap<>();
  21.             for(int j=0;j<newstr.length();j++){
  22.                 char c=newstr.charAt(j);
  23.                 freqmap.put(c,freqmap.getOrDefault(c,0)+1);
  24.             }
  25.             for(Character key:hmap.keySet()){
  26.                 if(freqmap.containsKey(key)){
  27.                     hmap.put(key,Math.min(hmap.get(key),freqmap.get(key)));
  28.                 }
  29.                 else{
  30.                     hmap.put(key,0);
  31.                 }
  32.             }
  33.         }
  34.         List<String> list=new ArrayList<>();
  35.         for(Character key:hmap.keySet()){
  36.             if(hmap.get(key)>0){
  37.                 for(int i=0;i<hmap.get(key);i++){
  38.                     list.add(key+"");
  39.                 }
  40.             }
  41.         }
  42.         System.out.println(list);
  43. 	}
  44. }
Success #stdin #stdout 0.14s 55572KB
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[e, l, l]
https://ideone.com/dzTEpq
language:
Java (HotSpot 12)
created:
13 days ago
visibility:
public

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