Lower case to upper case | Java program to convert a string to uppercase ; Converts a string to uppercase ; Driver code
class GFG { static String to_upper ( char [ ] in ) { for ( int i = 0 ; i < in . length ; i ++ ) if ( ' a ' <= in [ i ] && in [ i ] <= ' z ' ) in [ i ] &= ~ ( 1 << 5 ) ; return String . valueOf ( in ) ; } public static void main ( String [ ] args ) { String str = " geeksforgeeks " ; System . out . println ( to_upper ( str . toCharArray ( ) ) ) ; } }