Why can't my main class see the array in my calender class
- by Rocky Celltick Eadie
This is a homework problem. I'm already 5 days late and can't figure out what I'm doing wrong.. this is my 1st semester in Java and my first post on this site
Here is the assignment..
Create a class called Calendar. The class should contain a variable called events that is a String array. The array should be created to hold 5 elements. Use a constant value to specify the array size. Do not hard code the array size. Initialize the array in the class constructor so that each element contains the string “ – No event planned – “.
The class should contain a method called CreateEvent. This method should accept a String argument that contains a one-word user event and an integer argument that represents the day of the week. Monday should be represented by the number 1 and Friday should be represented by the number 5. Populate the events array with the event info passed into the method. Although the user will input one-word events, each event string should prepend the following string to each event:
event_dayAppoinment: (where event_day is the day of the week)
For example, if the user enters 1 and “doctor” , the first array element should read:
Monday Appointment: doctor
If the user enters 2 and “PTA” , the second array element should read:
Tuesday Appointment: PTA
Write a driver program (in a separate class) that creates and calls your Calendar class. Then use a loop to gather user input. Ask for the day (as an integer) and then ask for the event (as a one word string). Pass the integer and string to the Calendar object’s CreateEvent method. The user should be able enter 0 – 5 events. If the user enters -1, the loop should exit and your application should print out all the events in a tabular format. Your program should not allow the user to enter invalid values for the day of the week. Any input other than 1 – 5 or -1 for the day of the week would be considered invalid.
Notes:
When obtaining an integer from the user, you will need to use the nextInt() method on your Scanner object. When obtaining a string from a user, you will need to use the next() method on your Scanner object.
Here is my code so far..
//DRIVER CLASS
/**
*
* @author Rocky
*/
//imports scanner
import java.util.Scanner;
//begin class driver
public class driver {
/**
* @paramargs the command line arguments
*/
//begin main method
public static void main(String[] args) {
//initiates scanner
Scanner userInput = new Scanner (System.in);
//declare variables
int dayOfWeek;
String userEvent;
//creates object for calender class
calendercalenderObject = new calender();
//user prompt
System.out.println("Enter day of week for your event in the following format:");
System.out.println("Enter 1 for Monday");
System.out.println("Enter 2 for Tuesday");
System.out.println("Enter 3 for Wednsday");
System.out.println("Enter 4 for Thursday");
System.out.println("Enter 5 for Friday");
System.out.println("Enter -1 to quit");
//collect user input
dayOfWeek = userInput.nextInt();
//user prompt
System.out.println("Please type in the name of your event");
//collect user input
userEvent = userInput.next();
//begin while loop
while (dayOfWeek != -1) {
//test for valid day of week
if ((dayOfWeek>=1) && (dayOfWeek<=5)){
//calls createEvent method in calender class and passes 2 variables
calenderObject.createEvent(userEvent,dayOfWeek);
} else {
//error message
System.out.println("You have entered an invalid number");
//user prompts
System.out.println("Press -1 to quit or enter another day");
System.out.println("Enter 1 for Monday");
System.out.println("Enter 2 for Tuesday");
System.out.println("Enter 3 for Wednsday");
System.out.println("Enter 4 for Thursday");
System.out.println("Enter 5 for Friday");
System.out.println("Enter -1 to quit");
//collect user input
dayOfWeek = userInput.nextInt();
//end data validity test
}
//end while loop
}
//prints array to screen
int i=0;
for (i=0;i<events.length;i++){
System.out.println(events[i]);
}
//end main method
}
}
/**
*
* @author Rocky
*/
//imports scanner
import java.util.Scanner;
//begin calender class
public class calender {
//creates events array
String[] events = new String[5];
//begin calender class constructor
public calender() {
//Initializes array
String[] events = {"-No event planned-","-No event planned-","-No event planned-","-No event planned-","-No event planned-"};
//end calender class constructor
}
//begin createEvent method
public String[] createEvent (String userEvent, int dayOfWeek){
//Start switch test
switch (dayOfWeek){
case 1:
events[0] = ("Monday Appoinment:") + userEvent;
break;
case 2:
events[1] = ("Tuesday Appoinment:") + userEvent;
break;
case 3:
events[2] = ("WednsdayAppoinment:") + userEvent;
break;
case 4:
events[3] = ("Thursday Appoinment:") + userEvent;
break;
case 5:
events[4] = ("Friday Appoinment:") + userEvent;
break;
default:
break;
//End switch test
}
//returns events array
return events;
//end create event method
}
//end calender class
}
