The java.util.ArrayList.clear() method removes all of the elements from this list. The list will be empty after this call returns.
The following example shows the usage of java.util.Arraylist.clear() method.
The following example shows the usage of java.util.Arraylist.clear() method.
import java.util.ArrayList; public class ArrayListDemo { public static void main(String[] args) { // create an empty array list with an initial capacity ArrayList<Integer> arrlist = new ArrayList<Integer>(5); // use add() method to add elements in the list arrlist.add(20); arrlist.add(30); arrlist.add(10); arrlist.add(50); // let us print all the elements available in list for (Integer number : arrlist) { System.out.println("Number = " + number); } // finding size of this list int retval = arrlist.size(); System.out.println("List consists of "+ retval +" elements"); System.out.println("Performing clear operation !!"); arrlist.clear(); retval = arrlist.size(); System.out.println("Now, list consists of "+ retval +" elements"); } }
Let us compile and run the above program, this will produce the following result −
Number = 20 Number = 30 Number = 10 Number = 50 List consists of 4 elements Performing clear operation !! Now, list consists of 0 elements
Reference
Java ArrayList Source Code Examples
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- List (ArrayList) Iterator Example
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- Java ArrayList clear() Method Example
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- Java ArrayList removeAll() Method Example
- Java ArrayList remove() Method Example
- How to Iterate over ArrayList in Java
- How to Remove Element from ArrayList in Java
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- Create ArrayList from Another ArrayList in Java
- How to Create an ArrayList and Add Elements to It
ArrayList
Collection Framework
Java
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