static void printDNA ( String str [ ] , int n ) {
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    int x = i % 6 ;
    if ( x % 2 == 0 ) printUpperHalf ( str [ x ] ) ;
    else printLowerHalf ( str [ x ] ) ;
  }
}

static void printDNA ( String str [ ] , int n ) { for ( int i = 0 ; i < n ; i ++ ) { int x = i % 6 ; if ( x % 2 == 0 ) printUpperHalf ( str [ x ] ) ; else printLowerHalf ( str [ x ] ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier) dimensions: (dimensions)) (formal_parameter type: (integral_type) 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: (identifier)) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (expression_statement (method_invocation name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier))))) alternative: (expression_statement (method_invocation name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier))))))))))