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FirstUniqueChar.java
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FirstUniqueChar.java
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package com.vaibhav.interview;
import java.util.LinkedHashMap;
import java.util.Map;
public class Main {
public static int uniqueCharIndex(String str){
Map<Character, Integer> charMap = new LinkedHashMap<>();
for(int i =0; i < str.length(); i++){
if(charMap.containsKey(str.charAt(i))){
charMap.put(str.charAt(i), charMap.get(str.charAt(i))+1);
}else{
charMap.put(str.charAt(i), 1);
}
}
for(Map.Entry<Character, Integer> entry: charMap.entrySet()){
char c = entry.getKey();
int value = entry.getValue();
if(value == 1){
return str.indexOf(c);
}
}
// Iterator it = charMap.entrySet().iterator();
// while (it.hasNext()) {
// Map.Entry pair = (Map.Entry)it.next();
// System.out.println(pair.getKey() + " = " + pair.getValue());
// it.remove(); // avoids a ConcurrentModificationException
// }
//charMap.forEach((k, v) -> System.out.println(k+" : "+v));
return 0;
}
public static void main(String[] args) {
String str = "loveleetcode";
System.out.println(uniqueCharIndex(str));
}
}