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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public int firstUniqueChar(String str) {
  11.  
  12.     int index = -1;
  13.     str = str.toLowerCase();
  14.  
  15.     Map<Character, Integer> charFreqMap = new HashMap<>();
  16.  
  17.     // Update the map
  18.     for (int i = 0; i < str.length(); i++) {
  19.       char c = str.charAt(i);
  20.  
  21.       // Get the current frequency
  22.       int freq = charFreqMap.getOrDefault(c, 0);
  23.  
  24.       // Update the map
  25.       charFreqMap.put(c, (freq + 1));
  26.     }
  27.  
  28.     for (int i = 0; i < str.length(); i++) {
  29.       if (charFreqMap.get(str.charAt(i)) == 1) {
  30.         index = i;
  31.         break;
  32.       }
  33.     }
  34.  
  35.     return index;
  36.   }
  37. 	public static void main (String[] args) throws java.lang.Exception
  38. 	{
  39. 		// your code goes here
  40. 		Ideone x = new Ideone();
  41. 		System.out.println(x.firstUniqueChar("lotsOfLove"));
  42. 	}
  43. }
Success #stdin #stdout 0.08s 32668KB
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https://ideone.com/TWt72l
language:
Java (12.0.1)
created:
4 years ago
visibility:
public

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