public static void main ( String arr [ ] ) {
  double x1 = 2 , y1 = - 3 , r = 8 ;
  circle_equation ( x1 , y1 , r ) ;
}

public static void main ( String arr [ ] ) { double x1 = 2 , y1 = - 3 , r = 8 ; circle_equation ( x1 , y1 , r ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier) dimensions: (dimensions))) body: (block (local_variable_declaration type: (floating_point_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (unary_expression operand: (decimal_integer_literal))) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier) (identifier))))))