如何打印对象中的字符串？

const obj = {
  name: "John",
  age: 30
};

console.log(obj.toString());  // 打印对象的字符串表示

public class Main {
  public static void main(String[] args) {
    Person person = new Person("John", 30);
    System.out.println(person.toString());  // 打印对象的字符串表示
  }
}

class Person {
  private String name;
  private int age;

  public Person(String name, int age) {
    this.name = name;
    this.age = age;
  }

  @Override
  public String toString() {
    return "Person [name=" + name + ", age=" + age + "]";
  }
}

class Person:
    def __init__(self, name, age):
        self.name = name
        self.age = age

    def __str__(self):
        return f"Person [name={self.name}, age={self.age}]"

person = Person("John", 30)
print(person)  # 打印对象的字符串表示