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Chapter 6: Problem 16

Look at the following class: public class CheckPoint { public void message(int x) { System.out.print(鈥淭his is the first version 鈥�); System.out.println(鈥渙f the method.鈥�); } public void message(String x) { System.out.print(鈥淭his is the second version 鈥�); System.out.println(鈥渙f the method.鈥�); } } What will the following code display? CheckPoint cp = new CheckPoint(); cp.message(鈥�1鈥�)

Short Answer

Expert verified
Answer: The output will be "This is the second version of the method."

Step by step solution

01

Analyze the given methods

We have two "message()" methods inside the "CheckPoint" class. The first one takes an integer (int x) as its parameter, and the second one takes a String (String x) as its parameter. These methods are examples of method overloading since they have the same name, but different parameter types.
02

Identify the method being called

The given code creates an object of the "CheckPoint" class and calls the "message()" method with a String parameter ("1"). So, the method that will be executed is the one that takes a String as its parameter, i.e., the second method in the "CheckPoint" class.
03

Determine the output

Since the called method is the second "message()" method, which takes a String parameter, the output will be the following two lines concatenated together: "This is the second version " "of the method." So, the complete output will be: This is the second version of the method.

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Most popular questions from this chapter

Assume that \(r 1\) and \(r 2\) are variables that reference Rectangle objects, and the following statements are executed: r1.setLength(5.0); r2.setLength(10.0); r1.setWidth(20.0); r2.setWidth(15.0);

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You hear someone make the following comment: "A blueprint is a design for a house. A carpenter can use the blueprint to build the house. If the carpenter wishes, he or she can build several identical houses from the same blueprint." Think of this as a metaphor for classes and objects. Does the blueprint represent a class, or does it represent an object?

In this chapter we use the metaphor of a cookie cutter and cookies that are made from the cookie cutter to describe classes and objects. In this metaphor, are objects the cookie cutter, or the cookies?
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