remove duplicate characters from String

remove duplicate characters from String? (solution)
This is one of the interesting String question, which also has lots of variants. You need to remove duplicate characters from a given string keeping only the first occurrences. For example, if the input is ‘bananas’ the output will be ‘bans’. Pay attention to what output could be, because if you look closely original order of characters are retained the in output. This is where many developer make the a mistake of shorting character array of String and removing duplicates, similar to how you remove duplicates from array. That destroys original order of characters and will not be correct solution in this case.

Author: singhvirendra18gmailcom

Challenge14.java

@@ -2,6 +2,7 @@
 
 import static org.junit.Assert.assertTrue;
 
+
 import java.util.LinkedHashSet;
 import java.util.Set;
 import org.junit.jupiter.api.Test;
@@ -10,8 +11,8 @@
  * The Class Challenge14. remove duplicate characters from String? This is one
  * of the interesting String question, which also has lots of variants. You need
  * to remove duplicate characters from a given string keeping only the first
- * occurrences. For example, if the input is ‘bananas’ the output will be
- * ‘bans’. Pay attention to what output could be, because if you look closely
+ * occurrences. For example, if the input is ‘bananas’ the output will be
+ * ‘bans’. Pay attention to what output could be, because if you look closely
  * original order of characters are retained the in output
  * 
  */