Decide an appropriate datatype for each attribute and

Decide an appropriate datatype for each attribute and return type for each method. You will also
need to decide the parameter types for all mutator methods.
Decide an appropriate public/private modifier for each variable and each method.
*

CSE 205 Spring 2017
Page 4
9. Study the class diagram and the code that follows. Then fill in the three blanks given below. [6
points]
Vehicle[] vehicleList = new Vehicle[3];
vehicleList[0] = new Vehicle();
vehicleList[1] = new Truck();
vehicleList[2] = new Car();
for (int i=0; i <= 2; i++)
vehicleList[i].move();
a) vehicleList[0].move() refers to move() of ____Vehicle___ class
b) vehicleList[1].move() refers to move() of _____Truck___ class
c) vehicleList[2].move() refers to move() of ____Vehicle____ class
Section 3: Output Problems [Total 22 points]
10. Study the code segment given below and write the output of this code in the space provided
below. [10 points]
public class Split1
{
public static void main(String[] args)
{
String line = "/computer//science/";
String[] words = line.split("/");
System.out.println("\nsize " + words.length);
for (int i=0; i<words.length; i++)
System.out.println(words[i] + " with length" + words[i].length());
}
}
size 4
with length0
computer with length8
with length0
science with length7
Vehicle
Car
move()
move()
Truck

CSE 205 Spring 2017
Page 5
11. Write the output when the following code is executed. Consider the polymorphic invocation.
[12 points]
public class A
{
void doSomething()
{
System.out.println("Class A");
}
}
public class B extends A
{
void doSomethingB()
{
System.out.println("Class B");
}
}
public class C extends A
{
void doSomething()
{
System.out.println("Class C");
}
}
public class D extends B
{
void doSomething()
{
System.out.println("Class D");
}
}
public class TestInheritance
{
public static void main(String [] main)
{
A obj1 = new A();
B obj2 = new B();
C obj3 = new C();
D obj4 = new D();
obj1.doSomething();
obj1 = obj2;
obj1.doSomething();
obj1 = obj3;
obj1.doSomething();
obj4.doSomethingB();
}
}
Class A
Class A
Class C
Class B