Java: Test an array list is empty or not

Last update on March 12 2025 13:34:49 (UTC/GMT +8 hours)

Write a Java program to test whether an array list is empty or not.

Pictorial Presentation:

Sample Solution:-

Java Code:

import java.util.ArrayList;
import java.util.Collections;
  public class Exercise18 {
  public static void main(String[] args) {
          ArrayList<String> c1= new ArrayList<String>();
          c1.add("Red");
          c1.add("Green");
          c1.add("Black");
          c1.add("White");
          c1.add("Pink");
          System.out.println("Original array list: " + c1);
          System.out.println("Checking the above array list is empty or not! "+c1.isEmpty());
          c1.removeAll(c1);
          System.out.println("Array list after remove all elements "+c1);   
          System.out.println("Checking the above array list is empty or not! "+c1.isEmpty());
   }
}

Sample Output:

Original array list: [Red, Green, Black, White, Pink]                  
Checking the above array list is empty or not! false                   
Array list after remove all elements []                                
Checking the above array list is empty or not! true 

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to check if an ArrayList is empty using the isEmpty() method and print a custom message.
• Write a Java program to use a lambda expression with allMatch() to test if an ArrayList contains no elements.
• Write a Java program to iterate over an ArrayList and determine emptiness by counting elements manually.
• Write a Java program to compare two ArrayLists and determine if one is empty while the other is not.

Java Code Editor:

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