question: public int diff_commonSuffix ( String text1 , String text2 ) { int text1_length = text1 . length ( ) ; int text2_length = text2 . length ( ) ; int n = Math . min ( text1_length , text2_length ) ; for ( int i = 1 ; i <= n ; i ++ ) { if ( text1 . charAt ( text1_length - i ) != text2 . charAt ( text2_length - i ) ) { return i - 1 ; } } return n ; }
target:  Determine the common suffix of two strings