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#import "/template.typ": *
#show: A => apply(A)
#set raw(lang: "java-new")
#set par(leading: 0.6em)
#assignment(23, block: true)[
Write a program that defines an interface with three methods in the `pkgOne` package, implements the interface in a class within the `pkgTwo` package, and from the `main()` method in the working directory, instantiate the class and invoke the interface methods.
]
#scos("PackageInterfaceExample", include-before: ("pkgOne/MyInterface", "pkgTwo/MyClass"))
=== Discussion
#skind[Interfaces, classes and methods implemented in the program]
- Package `pkgOne`:
- Interface `MyInterface`:
- `void methodOne()`: An interface method.
- `void methodTwo()`: An interface method.
- `void methodThree()`: An interface method.
- Package `pkgTwo`:
- Class `MyClass` (implements `pkgOne.MyInterface`):
- `public void methodOne()`: Implementation of `methodOne` from `MyInterface`.
- `public void methodTwo()`: Implementation of `methodTwo` from `MyInterface`.
- `public void methodThree()`: Implementation of `methodThree` from `MyInterface`.
- Main program:
- Class `PackageInterfaceExample`:
- `public static void main(String[])`: Contains the main program creating an object of `MyClass` (which implements `MyInterface`) and calling its methods.
#signature()
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