public static void main ( String [ ] $ ) {
  for ( int i = 0 ;
  i < 20 ;
  ++ i ) Arrays . fill ( f [ i ] , '#' ) ;
  for ( int i = 20 ;
  i < 40 ;
  ++ i ) Arrays . fill ( f [ i ] , '.' ) ;
  f ( 0 , '.' ) ;
  f ( 21 , '#' ) ;
  System . out . println ( "40 99" ) ;
  Arrays . stream ( f ) . forEach ( System . out :: println ) ;
}

public static void main ( String [ ] $ ) { for ( int i = 0 ; i < 20 ; ++ i ) Arrays . fill ( f [ i ] , ' # ' ) ; for ( int i = 20 ; i < 40 ; ++ i ) Arrays . fill ( f [ i ] , ' . ' ) ; f ( 0 , ' . ' ) ; f ( 21 , ' # ' ) ; System . out . println ( "40 ▁ 99" ) ; Arrays . stream ( f ) . forEach ( System . out :: println ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)) (character_literal))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)) (character_literal))))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (decimal_integer_literal) (character_literal)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (decimal_integer_literal) (character_literal)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (expression_statement (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) name: (identifier) arguments: (argument_list (method_reference (field_access object: (identifier) field: (identifier)) (identifier)))))))