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Vector() |
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This constructor creates an empty Vector to hold a particular type of objects. Example - |
Vector <Integer> v = new Vector <Integer>();
Methods | Description |
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int size() | Returns the total number of elements in Vector. |
boolean isEmpty() | Returns true if Vector is empty. |
E firstElement() | Returns the first element in Vector. |
E lastElement() | Returns the last element in Vector. |
E elementAt(int index) | Returns the element present in Vector at a specified index. |
void addElement(E element) | Inserts an element in the Vector. |
boolean contains(Object object) | Returns true if the specified object is present in Vector. |
boolean removeElementAt(int index) | Returns true if element present in Vector is removed. |
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import java.util.*;
class Vector1
{
public static void main(String... ar)
{
Vector<String> vec= new Vector<String>();
vec.addElement("B");
vec.addElement("A");
vec.addElement("T");
vec.addElement("M");
vec.addElement("A");
vec.addElement("N");
System.out.println("Vector = "+vec);
System.out.println("Size of Vector = "+ vec.size());
System.out.println("First element in Vector = "+vec.firstElement());
System.out.println("Last element in Vector = "+vec.lastElement());
System.out.println("Element at 2nd index = "+ vec.elementAt(2));
vec.removeElementAt(2);
System.out.println("After removing element at 2nd index, Vector = "+ vec);
}
}
Vector = [B, A, T, M, A, N]
Size of Vector = 6
First element in Vector = B
Last element in Vector = N
Element at 2nd index = T
After removing element at 2nd index, Vector = [B, A, M, A, N]
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