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ArrayList clear() in Java with examples
  • Difficulty Level : Basic
  • Last Updated : 23 Aug, 2020

The clear() method of ArrayList in Java is used to remove all the elements from a list. The list will be empty after this call returns.

Syntax :

clear()

Parameters :
This function has no parameters.

Returns :
The method does not return any value. It removes all the elements in the list and makes it empty.

Example 1 : Program to demonstrate the use of clear() function




// Java code to demonstrate the working of
// clear() method in ArrayList
  
// for ArrayList functions
import java.util.ArrayList;
  
public class GFG {
    public static void main(String[] args)
    {
        // creating an Empty Integer ArrayList
        ArrayList<Integer> arr = new ArrayList<Integer>(4);
  
        // using add() to initialize values
        // [1, 2, 3, 4]
        arr.add(1);
        arr.add(2);
        arr.add(3);
        arr.add(4);
  
        // list initially
        System.out.println("The list initially: " + arr);
  
        // clear function used
        arr.clear();
  
        // list after clearing all elements
        System.out.println("The list after using clear() method: " + arr);
    }
}


Output:

The list initially: [1, 2, 3, 4]
The list after using clear() method: []

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