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Keyeszx

Arrays of class objects in Java

2 posts in this topic

For a class assignment we've been tasked with making an appointment class that holds some variables and another class that makes an array of the appointment class. But I'm not sure if I'm adding the appointment object correctly.

    public class Appointment {
     
        private int date, hour, minute;
        private String month, msg;
     
        public Appointment() {
            setMonth("APR");
            setDate(4);
            setHour(0);
            setMinute(0);
            setMessage("Default Message");
        }
    //constructor that takes parameters
    //main method that creates two objects to test the constructors, will be deleted before finished
    //set and get methods
    //toString method to print the values the object's variable values
    }
     
     
    public class Planner {
    Appointment[] DayPlanner = new Appointment[20];
    DayPlanner[0] = new Appointment();              //Error: ']' expected | invalid method declaration; return type required
       
    }


Edited by Keyeszx
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You can't put code that actually does something like "DayPlanner[0] = new Appointment();" in just the class body. It has to be either in a method or a static block, though that would require DayPlanner to be a static member of Planner.

 

I'd change it to look like this:

public class Planner {
	private Appointment[] dayPlanner;



	public Planner(int maxAppointments) {
		dayPlanner = new Appointment[maxAppointments];
		dayPlanner[0] = new Appointment();
	}
}



// Create a planner with 20 appointments
new Planner(20);

However I would recommend using an ArrayList<Appointment> instead of a fixed array.

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Or an alternative would be to create the instances of Appointment when you create DayPlanner, e.g.

public class Planner {
    Appointment[] DayPlanner = new Appointment[] {new Appointment(), new Appointment(), new Appointment()};
}

DayPlanner is an array with 3 elements.

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