Java Vector remove() Method

The remove() Java Vector class method is used to remove the specified element from the vector. There are two different types of Java remove() method which can be differentiated depending on its parameter. These are:

Java Vector remove(int index) Method
Java Vector remove(Object o) Method

remove(int index) Method:

This method remove the element at the specified position in this vector.

remove(Object o) Method:

This method remove the first occurrence of the specified element in this vector. If the vector does not contain the element, it is unchanged.

Syntax

Following is the declaration of remove() method:

public E remove(int index)
public boolean remove(Object obj)

Parameter

Parameter	Description	Required/Optional
index	It is an index of the element which will be removed.	Required
obj	It is an element which will be removed from the vector if present.	Required

Return

The remove(int index) method returns the element that was removed.

The remove(Object obj) method returns true if the vector contained the specified element.

Exceptions

ArrayIndexOutOfBoundsException- This method has thrown an exception if the index is out of range i.e. (index < 0 || index >= size()).

Compatibility Version

Java 1.2 and above

Example 1

import java.util.*;
public class VectorRemoveExample1 {  
	public static void main(String arg[]) {	
		//Create an empty Vector      
		Vector < Integer > in = new Vector < > ();
		//Add elements in the vector
		in.add(100);
		in.add(200);
		in.add(300);
		in.add(200);
		in.add(400);
		System.out.println("Values in vector: " +in);
		System.out.println("Remove first occourence of element 200: "+in.remove((Integer)200));
		System.out.println("Values in vector: " +in);
	      }            
}

Test it Now

Output:

Values in vector: [100, 200, 300, 200, 400]
Remove first occourence of element 200: true
Values in vector: [100, 300, 200, 400]

Example 2

import java.util.*;
public class VectorRemoveExample2 {  
	public static void main(String arg[]) {	
		//Create an empty Vector
		Vector<String> vector = new Vector<>();				
		//Add elements to the Vector
		vector.add("Java");
		vector.add("Android");
		vector.add("JavaScript");
		vector.add("Java");				
		//Display the elements of the Vector
		System.out.println("Elements of the Vector before remove: "+vector);		//Removing the Java from the Vector
		boolean b = vector.removeElement("Java");
		System.out.println("Is the removal successful? "+b);				
		//Printing the elements of the Vector
		System.out.println("Elements of the Vector after remove: "+vector);	
	      }            
}

Test it Now

Output:

Elements of the Vector before remove: [Java, Android, JavaScript, Java]
Is the removal successful? true
Elements of the Vector after remove: [Android, JavaScript, Java]

Example 3

import java.util.*;
public class VectorRemoveExample3 {  
	public static void main(String arg[]) {	
		Vector<Integer> vecObject = new Vector<Integer>(4);
		vecObject.add(3);
		vecObject.add(5);
		vecObject.add(3);
		vecObject.add(4);
		System.out.println("Values in vector :" +vecObject);
		System.out.println("Removed element at index 2 is: " +vecObject.remove(2));
		System.out.println("Values in vector after remove: " +vecObject);
	      }            
}

Test it Now

Output:

Values in vector :[3, 5, 3, 4]
Removed element at index 2 is: 3
Values in vector after remove: [3, 5, 4]

Example 4

import java.util.*;
public class VectorRemoveExample4 {  
	public static void main(String arg[]) {	
		//Create a first empty vector   
	      Vector<String> vec = new Vector<>(); 
	      //Add elements in the first vector	      
	      vec.add("Facebook");
	      vec.add("Whatsapp");
	      vec.add("Twitter");
	      vec.add("Instagram");
	      vec.add("Skype");
	      //Display the elements of a vector
		System.out.println("Values in vector :" +vec);
		//Remove the element at index -2
		System.out.println("Removed element at index -2: " +vec.remove(-2));
		//Again Display the elements of a vector
		System.out.println("Values in vector after remove: " +vec);
	      }            
}

Test it Now

Output:

Values in vector :[Facebook, Whatsapp, Twitter, Instagram, Skype]
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: -2
	at java.base/java.util.Vector.elementData(Vector.java:761)
	at java.base/java.util.Vector.remove(Vector.java:875)
	at myPackage.VectorRemoveExample4.main(VectorRemoveExample4.java:16)

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