How to check if a List is Empty in Java - Step by Step Examples

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How to check if a List is Empty in Java ?

Answer

To check if a List is empty in Java, you can use the isEmpty() method of the List interface.

✐ Examples

1 Check if List is Empty

In this example,

We create a List named myList.
We use the isEmpty() method of the List interface myList to check if it is empty.
The isEmpty() method returns true if the list is empty, false otherwise.
Finally, we print the result to the standard output.

Java Program

import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<Integer> myList = new ArrayList<>();
        boolean empty = myList.isEmpty();
        System.out.println("Is list empty: " + empty);
    }
}

Output

Is list empty: true

2 Check if Non-empty List is Empty

In this example,

We create a non-empty List named myList.
We use the isEmpty() method of the List interface myList to check if it is empty.
The isEmpty() method returns true if the list is empty, false otherwise.
Finally, we print the result to the standard output.

Java Program

import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<Integer> myList = new ArrayList<>();
        myList.add(1);
        boolean empty = myList.isEmpty();
        System.out.println("Is list empty: " + empty);
    }
}

Output

Is list empty: false

Summary

In this tutorial, we learned How to check if a List is Empty in Java language with well detailed examples.

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How to check if a List is Empty in Java - Step by Step Examples

How to check if a List is Empty in Java ?

Answer

✐ Examples

1 Check if List is Empty

Java Program

Output

2 Check if Non-empty List is Empty

Java Program

Output

Summary

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