Java Vector elementAt() Method

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Description

The Java Vector elementAt(int index) method is used to get the component at the specified index/location of the vector.

Declaration

Following is the declaration for java.util.Vector.elementAt() method

public Object elementAt(int index)

Parameters

index − This is an index into this vector.

Return Value

It returns the component at the specified index.

Exception

ArrayIndexOutOfBoundsException − if the index is negative or not less than the current size of this Vector object given.

Getting Element by Index of Vector of Integer Example

The following example shows the usage of Java Vector elementAt() method to get an element at particular location/index in this vector. We're creating a vector of Integer and added few elements to it using add() method. Then we've printed the element at index 1 using elementAt() method.

package com.tutorialspoint;

import java.util.Vector;

public class VectorDemo {
   public static void main(String[] args) {

      // create an empty Vector vec with an initial capacity of 4      
      Vector<Integer> vec = new Vector<>(4);

      // use add() method to add elements in the vector
      vec.add(4);
      vec.add(3);
      vec.add(2);
      vec.add(1);

      // let us print the element at 1st position in the vector
      System.out.println("Element at 1st position: "+vec.elementAt(1));
   }    
}

Output

Let us compile and run the above program, this will produce the following result.

Element at 1st position : 3

Getting Element by Index of Vector of String Example

The following example shows the usage of Java Vector elementAt() method to get an element at particular location/index in this vector. We're creating a vector of String and added few elements to it using add() method. Then we've printed the element at index 1 using elementAt() method.

package com.tutorialspoint;

import java.util.Vector;

public class VectorDemo {
   public static void main(String[] args) {

      // create an empty Vector vec with an initial capacity of 4      
      Vector<String> vec = new Vector<>(4);

      // use add() method to add elements in the vector
      vec.add("D");
      vec.add("C");
      vec.add("B");
      vec.add("A");

      // let us print the element at 1st position in the vector
      System.out.println("Element at 1st position: "+vec.elementAt(1));
   }    
}

Output

Let us compile and run the above program, this will produce the following result.

Element at 1st position: C

Getting Element by Index of Vector of Object Example

The following example shows the usage of Java Vector elementAt() method to get an element at particular location/index in this vector. We're creating a vector of Integer and added few elements to it using add() method. Then we've printed the element at index 1 using elementAt() method.

package com.tutorialspoint;

import java.util.Vector;

public class VectorDemo {
   public static void main(String[] args) {

      // create an empty Vector vec with an initial capacity of 4      
      Vector<Student> vec = new Vector<>(4);

      // use add() method to add elements in the vector
      vec.add(new Student(1, "Julie"));
      vec.add(new Student(2, "Robert"));
      vec.add(new Student(3, "Adam"));
      vec.add(new Student(4, "Jane"));	  

      // let us print the element at 1st position in the vector
      System.out.println("Element at 1st position: "+vec.elementAt(1));
   }    
}
class Student {
   int rollNo;
   String name;

   Student(int rollNo, String name){
      this.rollNo = rollNo;
      this.name = name;
   }

   @Override
   public String toString() {
      return "[ " + this.rollNo + ", " + this.name + " ]";
   }
   
   @Override
   public boolean equals(Object obj) {
      Student s = (Student)obj;
      return this.rollNo == s.rollNo && this.name.equalsIgnoreCase(s.name);
   }
}

Output

Let us compile and run the above program, this will produce the following result.

Element at 1st position: [ 2, Robert ]