如何打印对象内容而不是它们的内存位置？

public class MyClass {
    private String name;
    private int age;

    // 构造函数和其他方法省略

    @Override
    public String toString() {
        return "Name: " + name + ", Age: " + age;
    }
}

public class Main {
    public static void main(String[] args) {
        MyClass obj = new MyClass("John", 25);
        System.out.println(obj); // 打印对象内容而不是内存位置
    }
}

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

    def __str__(self):
        return f"Name: {self.name}, Age: {self.age}"

obj = MyClass("John", 25)
print(obj) # 打印对象内容而不是内存位置

class MyClass {
    constructor(name, age) {
        this.name = name;
        this.age = age;
    }

    toString() {
        return `Name: ${this.name}, Age: ${this.age}`;
    }
}

let obj = new MyClass("John", 25);
console.log(obj); // 打印对象内容而不是内存位置