This will check if str1 [ i ] is present in str2 or not str2 . find ( str1 [ i ] ) returns - 1 if not found otherwise it returns the starting occurrence index of that character in str2
if ( str2 . indexOf ( str1 . charAt ( i ) ) >= 0 ) { c += 1 ; } } System . out . println ( " No . ▁ of ▁ matching ▁ characters ▁ are : ▁ " + c ) ; }