Java Reference
In-Depth Information
public static void main(String [] args)
{
Vector employees = new Vector(50, 10);
System.out.println(“Add some Employee objects
to the vector...”);
int numSalary = 0;
for(int i = 1; i <= 51; i++)
{
Employee e = null;
int random = (int) (Math.random() * 3);
if(random == 0)
{
e = new Salary(“Salary “ + i,
“Palo Alto, CA”, i, 100000.00);
employees.add(0, e);
numSalary++;
}
else if(random == 1)
{
e = new Hourly(“Hourly “ + i,
“Cupertino, CA”, i, 100.00);
employees.insertElementAt(e, numSalary);
}
else
{
e = new Contractor(“Contractor “ + i,
“Milpitas, CA”, i, 1000.00);
employees.add(e);
}
}
System.out.println(“The size of the vector is “
+ employees.size());
System.out.println(“The capacity of the vector is “
+ employees.capacity());
}
}
The Vector class contains a size() method that returns the current number
of elements in the Vector and a capacity() method that returns the current
capacity of the Vector().
In the VectorDemo program, if the employee added to the Vector is of type
Salary, the object is added to the first element in the Vector:
employees.add(0, e);
