How to Handle a java.lang.NegativeArraySizeException in Java?

In Java, NegativeArraySizeException is the pre-defined class that can be used to represent the unchecked exception. It is a subclass of the java.lang package, and it can be used to identify that an array was attempted to be created with a negative size, which is not allowed in Java.

In this article, we will learn how to handle a java.lang.NegativeArraySizeException in Java.

Step-by-step Implementation:

• Create the class named GfGNegativeArraySize and write the main method into the class.
• Create the try block then write the logic into that block.
• Create one variable named size and assign the value of -5.
• Now, initialize the array with the size of the previously defined.
• Write the catch block for NegativeArraySizeException with print with error statement.
• Run the program if identifies the array created with a negative size then print the error message.

Program to Handle a java.lang.NegativeArraySizeException in Java

Java

// Java Program to  handle a NegativeArraySizeException
import java.lang.Exception;
import java.lang.NegativeArraySizeException;

// Driver Class
public class GfGNegativeArraySize {
      // Main Function
    public static void main(String args[])
    {
        try {
            int size = -5;
               // Attempting to create an array
              // With a negative size
            int[] array = new int[size];
        } catch (NegativeArraySizeException e)
        {
            // Handle the NegativeArraySizeException
            System.out.println("Error: Attempted to create an array with a negative size.");
            // Can add more detailed error handling or logging here if needed
        }
    }
}

Output

Error: Attempted to create an array with a negative size.

Explanation of the Program:

• We have created an array with a negative size.
• The attempt to create such an array throws a NegativeArraySizeException.
• Catch this exception using a try-catch block.
• In the catch block, it handles the exception by printing an error message indicating that an attempt was made to create an array with a negative size.
• We can extend the error handling or logging within the catch block as needed for our application.