Java ArrayList - size() Method
The java.util.ArrayList.size() method returns the number of elements in the ArrayList.
Syntax
public int size()
Parameters
No parameter is required.
Return Value
Returns the number of elements in the ArrayList.
Exception
NA
Example:
In the example below, the java.util.ArrayList.size() method is used to find out the number of elements in the ArrayList.
import java.util.*;
public class MyClass {
public static void main(String[] args) {
//creating a ArrayList
ArrayList<Integer> MyList = new ArrayList<Integer>();
//populating ArrayList
MyList.add(10);
MyList.add(20);
MyList.add(30);
System.out.println("Size of MyList: " + MyList.size());
//adding one more element in the ArrayList
MyList.add(40);
System.out.println("One element is added in the MyList.");
System.out.println("Now, Size of MyList: " + MyList.size());
}
}
The output of the above code will be:
Size of MyList: 3 One element is added in the MyList. Now, Size of MyList: 4
❮ Java.util - ArrayList
