First Repeating character in a string 


Please read the post for explanation:


Index of first repeated character in a string.




    System.out.println("First repeating character in a string");

	Set set=new HashSet<>();

	"adffda".chars()

			.filter(c->!set.add((char)c))

			.findFirst()

			.ifPresent(ch->System.out.print((char)ch));

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Index of first repeated character in a string.

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