Java ArrayList.size() Method

Last update on August 19 2022 21:50:42 (UTC/GMT +8 hours)

public int size()

The size() method is used to get the number of elements in an ArrayList object.

Package: java.util

Java Platform: Java SE 8

Syntax:

size()

Return Value:
The number of elements in this list

Return Value Type: int

Pictorial presentation of ArrayList.size() Method

Example: ArrayList.size() Method

The following example prints the size of an ArrayList object.

import java.util.*;

public class test {
    public static void main(String[] args)
    {
       // Create an ArrayList of 4 colors
         ArrayList<String> color_list = new ArrayList<String>(5);
        color_list.add(new String("While"));
        color_list.add(new String("Black"));
        color_list.add(new String("Red"));
		color_list.add(new String("Green"));

        // Get the size of the ArrayList.
        int size = color_list.size();
        System.out.println("ArrayList contains " + size +
            " elements.");
    }
}

Output:

F:\java>javac test.java
F:\java>javac test.java

F:\java>java test
ArrayList contains 4 elements.

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