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Repeated Character Count In java
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//'main' method must be in a class 'Rextester'. //Compiler version 1.8.0_111 import java.util.*; import java.util.HashMap; import java.util.Map; import java.lang.*; class Rextester { public static void main(String args[]) { String s="HelloWorld"; findCountChar(s); } private static void findCountChar(String s){ Map<Character,Integer> l_map=new HashMap<Character,Integer>(); for(Character ch:s.toCharArray()){ if(l_map.containsKey(ch)){ l_map.put(ch,l_map.get(ch)+1); } else{ l_map.put(ch,1); } } Set<Character>l_ch=l_map.keySet(); for(Character ch:l_ch){ if(l_map.get(ch)>1){ System.out.println(ch+"-Repeated word is--"+l_map.get(ch)); } } } }
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Compilation time: 0.73 sec, absolute running time: 0.2 sec, cpu time: 0.19 sec, memory peak: 18 Mb, absolute service time: 0,94 sec
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l-Repeated word is--3 o-Repeated word is--2