How do you test code that uses generic methods?

Testing code that uses generic methods in Java involves creating instances of those methods with specific types, and then verifying that the behavior of the methods behaves as expected. Generics provide type safety and can allow for more flexible and reusable code. Below is an example of how to test a generic method:

public class GenericMethodTest { // Generic method to return the last element of an array public static <T> T getLastElement(T[] array) { if (array == null || array.length == 0) { throw new IllegalArgumentException("Array must not be empty"); } return array[array.length - 1]; } public static void main(String[] args) { // Testing the generic method with different types Integer[] intArray = {1, 2, 3, 4}; String[] strArray = {"one", "two", "three"}; System.out.println("Last element in intArray: " + getLastElement(intArray)); // Output: 4 System.out.println("Last element in strArray: " + getLastElement(strArray)); // Output: three } }

Testing Generic Methods Java Type Safety Reusable Code

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