Find repeated character present first in a string | Java program to find the first character that is repeated ; this is O ( N ^ 2 ) method ; Driver code
import java . io . * ; import java . util . * ; class GFG { static int findRepeatFirstN2 ( String s ) { int p = - 1 , i , j ; for ( i = 0 ; i < s . length ( ) ; i ++ ) { for ( j = i + 1 ; j < s . length ( ) ; j ++ ) { if ( s . charAt ( i ) == s . charAt ( j ) ) { p = i ; break ; } } if ( p != - 1 ) break ; } return p ; } static public void main ( String [ ] args ) { String str = " geeksforgeeks " ; int pos = findRepeatFirstN2 ( str ) ; if ( pos == - 1 ) System . out . println ( " Not ▁ found " ) ; else System . out . println ( str . charAt ( pos ) ) ; } }