The java.util.ArrayList.isEmpty() method returns true if this list contains no elements.

Java ArrayList isEmpty() Method Example

The following example shows the usage of java.util.ArrayList.isEmpty() −

import java.util.ArrayList;

public class ArrayListDemo {
   public static void main(String[] args) {
      
      // create an empty array deque with an initial capacity
      ArrayList<Integer> arrlist = new ArrayList<>(5);

      // use add() method to add elements in the deque
      arrlist.add(25);
      arrlist.add(10);
      arrlist.add(20);
      arrlist.add(35);        
              
      boolean retval = arrlist.isEmpty();
      if (retval == true) {
         System.out.println("list is empty");
      } else {
         System.out.println("list is not empty");
      }
         
      // printing all the elements available in list
      for (Integer number : arrlist) {
         System.out.println("Number = " + number);
      }
   }
}

Let us compile and run the above program, this will produce the following result −

list is not empty
Number = 25
Number = 10
Number = 20
Number = 35

Reference

https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/ArrayList.html

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