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Java Vector clear() Method with Example

Vector Class clear() method: Here, we are going to learn about the clear() method of Vector Class with its syntax and example.
Submitted by Preeti Jain, on March 15, 2020

Vector Class clear() method

• clear() method is available in java.util package.
• clear() method is used to clear all of the existing objects in this Vector.
• clear() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• clear() method may throw an exception at the time of removing objects.
  UnsupportedOperationException: This exception may throw when this method unsupported by the Collection.

Syntax:

    public void clear();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is void, it returns nothing.

Example:

// Java program to demonstrate the example 
// of void clear() method of Vector 

import java.util.Vector;

public class CleartOfVector {
    public static void main(String[] args) {
        // Instantiates a Vector object  with
        // initial capacity of "10"
        Vector < String > v = new Vector < String > (10);

        // By using add() method is to add the
        // elements in this v
        v.add("C");
        v.add("C++");
        v.add("JAVA");

        // Display Vector 
        System.out.println("v: " + v);

        // By using clear() method is to
        // remove all the existing elements
        // in this Vector
        v.clear();

        // Display Updated Vector
        System.out.println("v.clear(): " + v);
    }
}

Output

v: [C, C++, JAVA]
v.clear(): []