If you have a class and you override the toString() method, it will return such a string method when the instance/object of the class is printed.

Why? when you create an object of a class and you print it to the console. It only returns the address of that object in the system memory.

For example, if we create an object of class A as shown below.

A a =new A();
Print(a);

Above code will print the address of the “a” object in the memory as adadads:A or Instance of A

So note that the toString() method in a class will only override the return of address location when the instance/object of the class is printed to the console.

Example:

// Create a class
class Name {
  String name = "justice";
  int age = 23;

  // override the toString method and return some String when the object/instance of this class is printed
  @override
  String toString() {
    // am returning the above class properties
    return this.name + " " + this.age.toString();
  }
}

 void main() {
  // create object/instance of the above class
  Name name = new Name();
  /* 
  If you print an object/instance of a class and that class override the toString method, 
  it will invoke the toString method implicitly instead of returning the instance address of the class.
  */
  print(name);
  // So because the below "Name" class override the toString methods the result will be: justice 23
 // if the "Name" class didn't override the toString method, then the result will be: Instance of 'Name' or Locatio address 
 }