question: public static boolean containsOnlyWhitespaces ( final char [ ] chars , final int start , final int length ) { final String string = new String ( chars , start , length ) ; final int stringLength = string . length ( ) ; for ( int index = 0 ; index < stringLength ; index ++ ) { final char character = string . charAt ( index ) ; if ( character >= 0x21 && character <= 0x7E ) { return false ; } } return true ; }
target:  Tests if the given char array contains only whitespaces