True or False 1) After a user defines his/her own constructor in a Java class, the default constructor is still available.___(2) Java supports multiple inheritances directly.___(3) Some methods in an interface can have method body.
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- T/F 3. Any Java class must have a main method, which is the first method that is called when the Java class is invoked.In java language please explain these three class design guidelines at least one page per guideline you code use some examples to explain. Encapsulation: Instance vs Static: Inheritance vs Aggregation:True or False An interface can be used to define a set of methods that a class must implement.
- True or False ___(25) Java’s constructor name is exactly the same as the class name. ___(26) Java allows multiple constructors to be defined within a class. ___(27) is-a relationship is similar to has-a relationship in Java.Inheritance The more general class is typically known as the parent class, super class, or base class. The more specific class is typically known as the child class, sub class, or derived class. The Java keyword extends allows you to indicate that one class should be the child class of the original parent class. The child will then inherit everything from the parent class, including variables and methods. {0} Online (1) Main.java x Student.java public class Main { 1 2 3 4 5 6 Run V 7 8 9 10 11 12 13 14 } public static void main(String[] args) { /* Person class example */ Person teacher = new Person(); teacher.setName("Laurel"); System.out.println(teacher); } Reid Moseley X Person.java x /* Student class example */ Student student = new Student (); student.setName("Alice"); System.out.println(student); CONSOLE SHELL Name: Laurel Name: Alice Reset to Template Open DesktopDefine the following terms with the help of examples: Encapsulation Constructor.
- Describe a signature of a constructor or method, and explain what overloading meansTrue or False ___(22) Java’s constructor does not return any data, hence the return type is void. ___(23) A class can be a superclass and a subclass in a class hierarchy in Java. ___(24) The expression super() is used to call the default constructor in the superclass.True or False ___(1) An abstract class can have fields. ___(2) You can create an object from an abstract class _ _(3) An abstract class can have both abstract methods and methods that have method body
- Library Information System Design and Testing Library Item Class Design and TestingDesign a class that holds the Library Item Information, with item name, author, publisher. Write appropriate accessor and mutator methods. Also, write a tester program(Console and GUI Program) that creates three instances/objects of the Library Items class. Extending Library Item Class Library and Book Classes: Extend the Library Item class in (1) with a Book class with data attributes for a book’s title, author, publisher and an additional attributes as number of pages, and a Boolean data attribute indicating whether there is both hard copy as well as eBook version of the book. Demonstrate Book Class in a Tester Program (Console and GUI Program) with an object of Book class.Artwork label (classes/constructors) PYTHON ONLY Define the Artist class with a constructor to initialize an artist's information and a print_info() method. The constructor should by default initialize the artist's name to "None" and the years of birth and death to 0. print_info() should display Artist Name, born XXXX if the year of death is -1 or Artist Name (XXXX-YYYY) otherwise. Define the Artwork class with a constructor to initialize an artwork's information and a print_info() method. The constructor should by default initialize the title to "None", the year created to 0, and the artist to use the Artist default constructor parameter values. Ex: If the input is: Pablo Picasso18811973Three Musicians1921 the output is: Artist: Pablo Picasso (1881-1973)Title: Three Musicians, 1921 If the input is: Brice Marden1938-1Distant Muses 2000 the output is: Artist: Brice Marden, born 1938Title: Distant Muses, 2000Constructor (default vs user defined)