[:it]Java: gestione classe vettore[:]

[:it]

Filippo Tommaso Marinetti

Questo programma, realizzato da Mirko Rossi, studente del corso di informatica e telecomunicazioni evidenzia come si può gestire la classe vector fornita da java.

import java.util.*;
public class VectorDemo {

public static void main(String args[]) {
// initial size is 3, increment is 2
Vector v = new Vector(3, 2);
System.out.println(“Initial size: ” + v.size());
System.out.println(“Initial capacity: ” + v.capacity());

v.addElement(new Integer(1));
v.addElement(new Integer(2));
v.addElement(new Integer(3));
v.addElement(new Integer(4));
System.out.println(“Capacity after four additions: ” + v.capacity());

v.addElement(new Double(5.45));
System.out.println(“Current capacity: ” + v.capacity());

v.addElement(new Double(6.08));
v.addElement(new Integer(7));
System.out.println(“Current capacity: ” + v.capacity());

v.addElement(new Float(9.4));
v.addElement(new Integer(10));
System.out.println(“Current capacity: ” + v.capacity());

v.addElement(new Integer(11));
v.addElement(new Integer(12));
System.out.println(“First element: ” + (Integer)v.firstElement());
System.out.println(“Last element: ” + (Integer)v.lastElement());

if(v.contains(new Integer(3)))
System.out.println(“Vector contains 3.”);

// enumerate the elements in the vector.
Enumeration vEnum = v.elements();
System.out.println(“\nElements in vector:”);

while(vEnum.hasMoreElements())
System.out.print(vEnum.nextElement() + ” “);
System.out.println();
}
}[:]