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 | Try this.. public void getFrequencyInString(){ String str = "apple"; HashMap hm = new HashMap(); for(int i = 0; i<str.length(); i++){ char c = str.charAt(i); if(hm.get(c)!= null){ hm.put(c, (Integer)(hm.get(c))+1); }else{ hm.put(c, 1); } } System.out.println(hm.entrySet()); } Output: [e=1, p=2, a=1, l=1]  |
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