Java | JSP | JSF Answers

Create a program that will make the user input the Month, Date and Year as Integers then use switch statemet and concatenation to display it in this format:

Sample output

Month : 6

Day : 13

Year : 2022

June 13, 2022

Note: If the user inputs an invalid Month then you should tell the user that it is invalid by using the default keyword.

Syntax of default keyword is default:

Write a program to print all the composite numbers between a and b

Fibonacci sequence

Create a Java program that asks the user to input a student number. The format of the student number is a sequence of the following:

Four (4) digits

A dash

Two (2) digits

A dash

Three (3) digits

Display a welcome message if the student number is valid; otherwise, show an appropriate error message. Do not copy the welcome message in the sample output.

Declare the Person superclass as abstract. Add this abstract method to the class:

public abstract void eat(String food);

Both the Student and Employee class inherit from abstract superclass Person, and provides an implementation for eat() which displays that the student or employee is eating a certain food.

(Note what happens if you don’t  implement eat().)

Create an interface called StudentInterface. This interface has the following abstract method:

public void study(String subject);

The Student class implements this interface, and provides an implementation for study() which displays that the student is studying a certain subject.

(Note what happens if you don’t  implement study().)

Create an interface called EmployeeInterface. This interface has the following abstract method:

public void workingOn(String task);

The Employee class implements this interface, and provides an implementation for workingOn() which displays that the employee is working on a certain task.

(Note what happens if you don’t  implement workingOn().)

Write a program that initially requests

the user to enter the number of students

in a class. The program then proceeds to request the user to enter the marks (double) of these

students; these are to be inserted into an

array. Once all the marks have been entered,

your program shall have and use the below

functions

1. public static double sum(int [] array). Calculate & return sum of all marks.

2. Public static double[] sort(int []

array). Sort array containing marks.

3. public static double max(int []

array). Return highest mark.

4. public static double min(int [] array). Return lowest mark.

Write a program that initially requests

the user to enter the number of students

in a class. The program then proceeds to request the user to enter the marks (double) of these

students; these are to be inserted into an

array. Once all the marks have been entered,

your program shall have and use the below

functions

1. public static double sum(int [] array). Calculate & return sum of all marks.

2. Public static double[] sort(int []

array). Sort array containing marks.

3. public static double max(int []

array). Return highest mark.

4. public static double min(int [] array). Return lowest mark.

Write a program that initially requests

the user to enter the number of students

in a class. The program then proceeds to request the user to enter the marks (double) of these

students; these are to be inserted into an

array. Once all the marks have been entered,

your program shall have and use the below

functions

1. public static double sum(int [] array). Calculate & return sum of all marks.

2. Public static double[] sort(int []

array). Sort array containing marks.

3. public static double max(int []

array). Return highest mark.

4. public static double min(int [] array). Return lowest mark.