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The size() method of Java AbstractCollection class
The size() method of the AbstractCollection class returns the numbers of elements in the collection. The method returns Integer.MAX_VALUE if the total number of elemnts in the collection exceeds the Interger.MAX_VALUE.
The syntax is as follows:
public abstract int size()
To work with AbstractCollection class in Java, import the following package:
import java.util.AbstractCollection;
The following is an example to implement AbstractCollection size() method in Java:
Example
import java.util.ArrayList; import java.util.AbstractCollection; public class Demo { public static void main(String[] args) { AbstractCollection<Object> absCollection = new ArrayList<Object>(); absCollection.add("Laptop"); absCollection.add("Tablet"); absCollection.add("Mobile"); absCollection.add("E-Book Reader"); absCollection.add("SSD"); absCollection.add("HDD"); System.out.println("AbstractCollection = " + absCollection); System.out.println("Count of Elements in the AbstractCollection = " + absCollection.size()); absCollection.remove("Tablet"); absCollection.remove("SSD"); System.out.println("Collection after removing some 2 elements = " + absCollection); System.out.println("Count of Elements in the updated AbstractCollection = " + absCollection.size()); } }
Output
AbstractCollection = [Laptop, Tablet, Mobile, E-Book Reader, SSD, HDD] Count of Elements in the AbstractCollection = 6 Collection after removing some 2 elements = [Laptop, Mobile, E-Book Reader, HDD] Count of Elements in the updated AbstractCollection = 4
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