CODEWITHSUNDEEP
javaarraysswinguser-interface
JOSEPH VADAKARA
JOSEPH VADAKARA

Reputation: 1

Create a two dimensional array of different data types (Date and double)

I am trying to make a program to do calculations of doubling time based on multiple readings at different points in time.

I am using a Netbeans JFrame with a JTextfield and a DateChooser with an add button. I intend to add the values in the JTextfield and the DateChooser to a two dimensional array of the data type [Date,double] each time the add button is clicked.

Once all the data is entered I have another button that then plots a graph based on these data points and calculates the doubling time and generates a report.

I am facing the following problems.

I will not know the number of elements I will have it can be 2 it can be 20 it will depend on the observations, I am unsure of how I can set this up in the context of a JTextField, JButton and DateChooser

Any help will be appreciated.

Upvotes: 0

Views: 185

Answers (3)

Girija Phadnavis
Girija Phadnavis

Reputation: 1

You can have complex user type object with 2 fields and then have array of that object.

Upvotes: 0

MadProgrammer
MadProgrammer

Reputation: 347314

I will not know the number of elements I will have it can be 2 it can be 20 it will depend on the observations, I am unsure of how I can set this up in the context of a JTextField, JButton and DateChooser

I wouldn't. It would be eaiser to manage with a JTable.

This way you won't need to care how many observations need to be made, they can simply keep adding new rows as they want.

I would also make a simple Object that contains the Date and double value, maybe called Observation, which can then simply be managed by the JTable's model and if required, transferred to something like a List or array.

This links the Date and value together in a obvious manner which is not easily disconnected - IMHO

Upvotes: 1

Brett Pyke
Brett Pyke

Reputation: 180

Instead of using an Array, use a List. That way you can use List.add() and you don't need to worry about how many elements are going to be in that list.

Elements in a list can be access similar to an array by using List.get(index) to get the objects or a more generic for( element : List ) {}.

Upvotes: 0

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