(1) What should be done if there are different parameter types during parameterized testing in JUint?

If there are different parameter types during parameterized testing in JUnit, then you can use the `@MethodSource` annotation to provide a method that returns a `Stream` of arguments for the test method. In this method, you can define the different parameter types and return them as a `Stream` of arguments.

For example, let's say you have a test method `testAddition()` that takes two parameters - one of type `int` and one of type `double`. You can define a method that returns a `Stream` of arguments for this test method as follows:

@ParameterizedTest
@MethodSource("argumentProvider")
void testAddition(int num1, double num2) {
    double result = num1 + num2;
    assertEquals(10.0, result);
}

static Stream<Arguments> argumentProvider() {
    return Stream.of(
        Arguments.of(7, 3.0),
        Arguments.of(5, 5.0),
        Arguments.of(8, 2.0)
    );
}

In this example, the `argumentProvider()` method returns a `Stream` of `Arguments` where each `Argument` contains two parameters - one of type `int` and one of type `double`. The `@MethodSource` annotation is used to specify this method as the source of arguments for the `testAddition()` method.