The first element in the Vector can be obtained using the firstElement() method of vector class that is represent util package. The last element in the Vector can be obtained using the lastElement() method of vector class that is also represent util package. Neither of these methods requires any parameters.
The first and last elements of the vector can be extracted in two ways:
- By directing getting the element at 0th index and size-1 index through get() method.
- By using firstElement() and lastElement() method.
Method 1: Getting elements at 0th and last index
We can use get() method:
- For first element, get the element at 0th index.
- For last element, get the element at (vector’s size-1)th index.
Java
// Java program to get the first and// last element of vector import java.util.Vector; public class Example { public static void main(String args[]) { // Create instance of Vector class. Vector<Integer> vector = new Vector<>(); // Add some Element in Vector vector.add(5); vector.add(9); vector.add(0); vector.add(5); vector.add(3); System.out.println("The Vector Elements are: " + vector); System.out.println( "The First Element of the Vector is : " + vector.get(0)); System.out.println( "The Last Element of the Vector is : " + vector.get(vector.size() - 1)); }} |
Output
The Vector Elements are: [5, 9, 0, 5, 3] The First Element of the Vector is : 5 The Last Element of the Vector is : 3
Method 2: Using firstElement() and lastElement() method
These two methods do not accept anything as parameters.
- firstElement() method gives the first element of the vector.
- lastElement() method gives the last element of the vector.
Java
// Java program to return the first and last// element of the vector import java.util.Vector; public class Example { public static void main(String args[]) { // Create instance of Vector class. Vector<Integer> vector = new Vector<>(); // Add some Element in Vector vector.add(5); vector.add(9); vector.add(0); vector.add(5); vector.add(3); System.out.println("The Vector Elements are: " + vector); System.out.println( "The First Element of the Vector is : " + vector.firstElement()); System.out.println( "The Last Element of the Vector is : " + vector.lastElement()); }} |
Output
The Vector Elements are: [5, 9, 0, 5, 3] The First Element of the Vector is : 5 The Last Element of the Vector is : 3
