static boolean check ( int n ) {
  if ( n % 2 == 0 || n % 6 == 0 ) {
    return false ;
  }
  if ( n % 3 == 0 ) {
    return false ;
  }
  for ( int i = 6 ;
  i * i <= n ;
  i += 6 ) {
    if ( n % ( i - 1 ) == 0 || n % ( i + 1 ) == 0 ) return false ;
  }
  return true ;
}

static boolean check ( int n ) { if ( n % 2 == 0 || n % 6 == 0 ) { return false ; } if ( n % 3 == 0 ) { return false ; } for ( int i = 6 ; i * i <= n ; i += 6 ) { if ( n % ( i - 1 ) == 0 || n % ( i + 1 ) == 0 ) return false ; } return true ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)))) consequence: (block (return_statement (false)))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (block (return_statement (false)))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (identifier)) update: (assignment_expression left: (identifier) right: (decimal_integer_literal)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (decimal_integer_literal)) right: (binary_expression left: (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (decimal_integer_literal)))) consequence: (return_statement (false))))) (return_statement (true))))