Java ArrayList clear() method

The clear () method of Java ArrayList class provides an easy way to discard all elements of the ArrayList (removes all elements of the ArrayList).

Syntax:

Parameter:

No parameters.

Return:

Nothing.

Example 1

import java.util.ArrayList;
public class ArrayListClearExample1
{
ArrayList<String> letters = new ArrayList<>();
letters.add("A");
letters.add("B");
letters.add("C");
System.out.println(letters);	// [A, B, C]
letters .clear()			// clear all letters elements
System.out.println(letters);	// []
}

Test it Now

Output:

[A, B, C]

[]

Example 2:

import java.util.ArrayList;
public class ArrayListClearExample2
{
ArrayList<String> birds = new ArrayList<>();
birds.add("Parrot");
birds.add("Owl");
birds.add("Swallow");
System.out.println(birds);		// ["Parrot", "Owl", "Swallow"]
System.out.println(birds.size());	// prints: 3
birds.clear();
System.out.println(birds.size());	// prints: 0
System.out.println(birds);		// []
}

Test it Now

Output: