Question

What method must a class implement in order to concatenate an object of the class with a String object?

a. A constructor
b. length
c. toString
d. print

Answer 1

A class must implement the toString method to concatenate its objects with a String, allowing a representation of the object to be included in the String concatenation.

Step-by-step explanation:

To concatenate an object of a class with a String object in Java, the class must implement the toString method. This method returns a String representation of an object. When you attempt to concatenate an object with a String, Java implicitly calls the object's toString() method. If you haven't overridden toString() in your class, the default implementation in the Object class will be used, which may not give the desired output. Overriding toString() allows you to control how your object is represented as a String, which is particularly useful for concatenation and printing object information.