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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
Updated on: 30-Jul-2019
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