ANSWERS TO ODD-NUMBERED EXERCISES - Java Programming: From Problem Analysis to Program Design - page 1011

5. a. i. Constructor at Line 1.

ii. Constructor at Line 3.
iii. Constructor at Line 4.
b. public CC()
{

u = 0;
v = 0;
w = 0.0;

}
c. public CC( int a)
{

u = a;
v = 0;
w = 0.0;

}
d. public CC( int a, int b)
{

u = a;
v = b;
w = 0.0;

}
e. public CC( int a, int b, double d)
{

u = a;
v = b;
w = d;

}
7. Automobile
9. One.
11. a. It creates the object c1 , and the instance variables hr , min ,and sec are initialized to 0 .

b. It creates the object c2 . The instance variable hr is initialized to 5 , the instance
variable min is initialized to 12 , and the instance variable sec is initialized to 30 .
c. The values of the instance variables hr , min , and sec of the object c1 are set to
3 , 24 , and 36 , respectively.
d. The value of the instance variables hr of the object c2 is set to 9 .

13. In Java, a class combines data and operations on data in a single unit. Typically, we do

not want the user to directly manipulate the data, so data members are declared as
private . To allow the users to manipulate the private members of a class, the
user is provided with public members. Therefore, we need both public and
private members in a class.