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How to check the Java list size?
List provides a method size() to check the current size of the list.
Syntax
int size()
Returns the number of elements in this list. If this list contains more than Integer.MAX_VALUE elements, returns Integer.MAX_VALUE.
Returns
The number of elements in this list.
Example
The following example shows how to get size of a list using size() method.
package com.tutorialspoint;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class CollectionsDemo {
public static void main(String[] args) {
List<Integer> list = new ArrayList<>(Arrays.asList(1,2,3,4));
System.out.println("List: " + list);
System.out.println("List Size: " + list.size());
list.add(5);
list.add(6);
list.add(7);
System.out.println("List: " + list);
System.out.println("List Size: " + list.size());
list.remove(5);
System.out.println("List: " + list);
System.out.println("List Size: " + list.size());
}
}Output
This will produce the following result −
List: [1, 2, 3, 4] List Size: 4 List: [1, 2, 3, 4, 5, 6, 7] List Size: 7 List: [1, 2, 3, 4, 5, 7] List Size: 6
Updated on: 09-May-2022
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