Question

Correct the mistakes public class customer { public static void main(String[] args) { D customer=new d(); d.employee(56,”ali”); d.department(7,8.6,9); } public void employee(String name, int age) { System.out.println("Your name is"+name); System.out.println(“Age is”+age); } public int department(double d, double t, int a) { System.out.println("I have java exam at 3:00"); Return(1.1); } } V. PROGRAMMING. Write a complete JAVA program to implement the following. 1. Create a class named Exponent. Its main() method accepts an integer value from a user at the keyboard, and in turn passes the value to a method that squares the number (multiplies it by itself) and to a method that cubes the number (multiplies it by itself twice). The main() method displays the results. Create the two methods that respectively square and cube an integer that is passed to them, returning the calculated value. Save the application as Exponent.java. 2. Create a class named Student. A student has fields for an ID number, name, course, number of credit hours earned, and number of points earned. Accept values to all fields. A student also has a field for grade point average. Include a method to compute a grade point average field by dividing points earned by credit hours earned. Write methods to display the values in each Student field. By declaring a student object from the class you created call all the methods in main method and display all results in your program.

Answer 1

/*********************Customer.java************************/

public class Customer {
   public static void main(String[] args) {
       Customer d = new Customer();
       d.employee("ali", 56);
       d.department(7, 8.6, 9);
   }

   public void employee(String name, int age) {
       System.out.println("Your name is " + name);
       System.out.println("Age is " + age);
   }

   public int department(double d, double t, int a) {
       System.out.println("I have java exam at 3:00");
       return (int) (1.1);
   }
}

/****************output******************/

Your name is ali
Age is 56
I have java exam at 3:00

/*******************************Exponent.java**************************/

import java.util.Scanner;

public class Exponent {

   public static void main(String[] args) {

       // Scanner class is used to enter value from keyboard or user
       Scanner scan = new Scanner(System.in);
       System.out.print("Enter the value to find the square and cube: ");
       // save a value form user
       int value = scan.nextInt();
       // calling both method and save returned value
       int squaredValue = square(value);
       int cubeValue = cube(value);
       // print the information
       System.out.println("After Square: " + squaredValue);
       System.out.println("After Cube: " + cubeValue);
       scan.close();
   }

   // method square
   private static int square(int value) {
       return value * value;
   }

   // method cube
   private static int cube(int value) {
       return value * value * value;
   }
}
/***************output************************/

Enter the value to find the square and cube: 5
After Square: 25
After Cube: 125

/*****************************Student.java************************/

public class Student {

   // data field
   String id;
   String name;
   String course;
   int numberOfHoursCredit;
   int numberOfPoints;

   // constructor
   public Student(String id, String name, String course, int numberOfHoursCredit, int numberOfPoints) {
       super();
       this.id = id;
       this.name = name;
       this.course = course;
       this.numberOfHoursCredit = numberOfHoursCredit;
       this.numberOfPoints = numberOfPoints;
   }

   // To display the information
   public void displayInfo() {

       System.out.println("Student id: " + id);
       System.out.println("Student name: " + name);
       System.out.println("Studnet course: " + course);
       System.out.println("number of hours credit: " + numberOfHoursCredit);
       System.out.println("Number of Points Earned: " + numberOfPoints);
       System.out.println("Grade point Average: " + computeGradePointAvg());
   }

   // method to compute grade point average
   public double computeGradePointAvg() {

       return (double) numberOfPoints / (double) numberOfHoursCredit;
   }

   public static void main(String[] args) {

       Student student = new Student("ST101", "Ali", "CSE101", 5, 43);
       student.displayInfo();
   }

}
/*****************************output*************************/

Student id: ST101
Student name: Ali
Studnet course: CSE101
number of hours credit: 5
Number of Points Earned: 43
Grade point Average: 8.6

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