java - 如何使用java通过对象名称打印类的属性？

Question

在Python中，如果你想打印类属性的字符串表示形式，你可以定义类似的内容

class building:
   def __init__(self,type,height):
       self.type = type
       self.height = height

    def __str__():
        return "i am a %s and i am {:%.1f} meters tall", (type,height)

hospital = Building()
hospital.type = "Medical Facility"
hospital.height = 30

print(hospital)
>>> i am a Medical Facility and i am 30.0 meters tall

java 是否有相当于 python __str__ 的东西？如果不是，我怎样才能实现上面的输出？

Answer 1

覆盖“toString()”。我觉得和python中的str()是一样的

public class Employee {
    public int id;
    public String fName;
    public String mName;

public Employee(int id, String fName, String mName) {
    this.id = id;
    this.fName = fName;
    this.mName = mName;
}




@Override
public String toString() {
    String output = "Hello, I am employee " + id + ", my first name is " + fName + " and my middle name is " + mName;
    return output;
}


public static void main(String[] args) {
    Employee e= new Employee(1, "foo" ,"bar");
    System.out.println(e.toString());
}
}