Last Updated : 11 Jul, 2025
The java.util.Vector.removeElement() method is used to remove first occurrence of particular object. If object is not found then it returns false else it returns true. If a particular object is present inside vector and removeElement() method call on that vector element then this method reduces vector size by 1.
Syntax:
public boolean removeElement(Object obj)
Parameters: This function accepts object as parameter which is to be removed.
Return Type: On Successful of deletion this function returns True otherwise this function returns False.
Exceptions: This method does not raise any exception.
Below programs illustrates the Vector.removeElement() function.
Program 1:
Java
// Java program to understand
// about vector.removeElement() function
// because vector is present in this package
import java.util.*;
// Driver Code
public class vector_demo {
// main method begins here
public static void main(String[] args)
{
// creating vector type object
Vector<Integer> v
= new Vector<Integer>();
// inserting elements into the vector
v.add(1);
v.add(2);
v.add(3);
v.add(4);
v.add(5);
v.add(6);
// printing vector before deleting element
System.out.println("Before deleting");
System.out.println("Vector: " + v);
System.out.println("Size: " + v.size());
System.out.println("\nAfter deleting");
// trying to deleting object 3
boolean flag = v.removeElement(3);
if (flag) {
System.out.println("Element '3' has been removed");
}
else {
System.out.println("Element '3' is not present in Vector");
}
System.out.println("Vector: " + v);
System.out.println("Size: " + v.size());
}
}
Output:
Before deleting Vector: [1, 2, 3, 4, 5, 6] Size: 6 After deleting Element '3' has been removed Vector: [1, 2, 4, 5, 6] Size: 5
Example 2:
Java
// Java program to understand
// about vector.removeElement() function
// because vector is present in this package
import java.util.*;
// Driver Code
public class vector_demo {
// main method begins here
public static void main(String[] args)
{
// creating vector type object
Vector<Integer> v = new Vector<Integer>();
// inserting elements into the vector
v.add(1);
v.add(2);
v.add(3);
v.add(4);
v.add(5);
v.add(6);
// printing vector before deleting element
System.out.println("Before deleting");
System.out.println("Vector: " + v);
System.out.println("Size: " + v.size());
System.out.println("\nAfter deleting");
// trying to deleting object 15
boolean flag = v.removeElement(15);
// since object 15 is not present flag will be false
if (flag) {
System.out.println("Element '15' has been removed");
}
else {
System.out.println("Element '15' is not present in Vector");
}
System.out.println("Vector: " + v);
System.out.println("Size: " + v.size());
}
}
Output:
Before deleting Vector: [1, 2, 3, 4, 5, 6] Size: 6 After deleting Element '15' is not present in Vector Vector: [1, 2, 3, 4, 5, 6] Size: 6
Time complexity: O(n). // n is the size of the vector.
Space complexity: O(1).
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