Question

Please write a java program (using dialog box statements for user input) that has the following methods in it: (preferably in order)  

1. a method to read in the name of a University and pass it back
2. a method to read in the number of students enrolled and pass it back
3. a method to calculate the tuition as 20000 times the number of students and pass it back
4. a method print the name of the University, the number of students enrolled, and the total tuition

Design Notes:

• The method described in Item #1 above will read in a string and pass it back to the main program. Nothing is passed to the method, but the University name is passed back
• The method described in Item #2 above will read in an integer for the number of students enrolled and pass it back to the main program. Nothing is passed to the method, but the University name is passed back to the main program
• The method described in Item #3 above will receive the number of students. It will then do the calculation for the tuition and pass back that value, which is a double value to the main program
• The method described in Item #4 above will receive all data for printing and pass nothing back to the main program

Please copy the java code along with a screen print (snippet) of the final output. I would like both to review the work that I already have done. Thanks in advance!

Answer 1

Following is the java code for the above problem:

import javax.swing.JOptionPane;

public class Dialog_box_stmt_eg {

   static String name(){
       String name;

   // Get the university name.
   name = JOptionPane.showInputDialog("What is university name? ");

   // Display university name.
   JOptionPane.showMessageDialog(null, "University name is=" + name);
       return name;
   }
   static int Students_enrolled(){
       String input; // To hold number of students enrolled
   int no_of_students;
  
   // Prompt user to input number of students enrolled
   input = JOptionPane.showInputDialog("Enter number of students enrolled");

   // Convert the String input to an int.
   no_of_students = Integer.parseInt(input);

       return no_of_students;
   }
  
   static double Calculate_fees(int stud_enrolled){
      
   double fees; // To hold fees
  
   fees= 20000*stud_enrolled;

   // Display calculated fees
   JOptionPane.showMessageDialog(null,
   "Total tution fees for "+stud_enrolled+" are = "+stud_enrolled+"*20000 = " + fees);
       return fees;
   }
  
   static void print(int stud_enrolled, String name , double tution_fees ){
       JOptionPane.showMessageDialog(null,
stud_enrolled+" students enrolled in "+name+ " university with total tution fees of = "+tution_fees);
      
       System.out.println( stud_enrolled+" students enrolled in "+name+ " university with total tution fees of = "+tution_fees);
   }
  
   public static void main(String[] args) {
       String univ_name= name();
       System.out.println("univ name is="+univ_name);
      
       int stud_enrolled=Students_enrolled();
       System.out.println("Number of students enrolled="+stud_enrolled +" in "+ univ_name + " university");
      
       double tution_fees=Calculate_fees(stud_enrolled);
       System.out.println("total tution fees = "+tution_fees);
      
       print(stud_enrolled, univ_name, tution_fees);
   }
}

Program screenshots:

Explanation: JOptionPane.showInputDialog -- is used for dialog box statements for user input as mentioned in question. Additional import statement is need to be added "import javax.swing.JOptionPane;"

Output Images of the code are below:

Output in console:

univ name is=ABCDEFGH
Number of students enrolled=10 in ABCDEFGH university
total tution fees = 200000.0
10 students enrolled in ABCDEFGH university with total tution fees of = 200000.0

NOTE: You can add various validations as per your choice as it is not mentioned in the question, so i have not added those in order not to complex the answer. Also you can remove or add DISPLAY or System.out.println(); lines as per your choice. I have added in order to give more understanding/readability to the code. If you dont want these lines you can comment it out and execute the rest of the code.