Exam 11: Advanced Inheritance Concepts

It is common to create an interface when you want a class to implement behavior from more than one parent.

Why do many programmers consider multiple inheritance to be a difficult concept?

When you assign a variable or constant of one type to a variable of another type, the behavior is called ____.

While a class can inherit from any abstract superclass, it can only implement one interface.

public abstract class Car { private String model; public abstract void color(); public String getModel() { return model; } public void setModel(String modelName) { model = modelName; } } The above code creates a generic abstract class named Car with an abstract color() method. Using the code below, fill in the shaded statements in order to create a Honda class that extends Car. public class ____ extends ____ { public void ____ { System.out.println("I like your red car!"); } }

public abstract class Car { private String model; public abstract void color(); public String getModel() { return model; } public void setModel(String modelName) { model = modelName; } } public class Honda extends Car { public void color() { System.out.println("red"); } } public class Ford extends Car { public void color() { System.out.println("blue"); } } public class MyCars { public static void main(String[] args) { Honda myHonda = new Honda(); Ford myFord = new Ford(); myHonda.setModel("My Honda is "); myFord.setModel("My Ford is "); System.out.print(myHonda.getModel()); myHonda.color(); System.out.print(myFord.getModel()); myFord.color(); } } In the above code, the myHonda.getModel() and myHonda.color() method calls produce different output from when the same methods are used with myFord. Explain why this is the case.

____ compress the data they store, which reduces the size of archived class files.

The Object class ____ method converts an Object into a String that contains information about the Object.

In other programming languages, such as C++, abstract classes are known as ____________________ classes.

public abstract class Car { private String model; public abstract void color(); public String getName() { return model; } public void setName(String carModel) { model = carModel; } } Using the code above, would it be possible to create a class in which you declare a Car object with the statement Car myCar = new Car("Honda");? Explain why or why not.