How to save a bluej program as .java how to#
How to save a bluej program as .java code#

However this class has also its single static instance which can be referenced via getter method and used anywere in your code. In Singleton pattern, the constructor of the class that we apply the pattern is private, so you cannot make instances of it. Anyway, you can use Singleton design pattern in your application to get and use the same instance (in your case the same main instance) anywhere in your code. The main window class instance? It seems you have only one instance of your main window which may extend JFrame or JPanel or JDialog etc. So, how do I get the main window instance, so I could get that panel list, get the specific panel and run SampleMethod with this instance?ДЄs panels are added to some sort of list in the main window class As panels are added to some sort of list in the main window class instance, I just made it public, and want to access it in mouseClicked event of the button. Swing - get main window class instance from button class I need to run a method (lets call it SampleMethod) in a panel class upon the click on specific button.

How to save a bluej program as .java code#

Of course, this is all conjecture without seeing some actual code :) When the button inside the JFrame needs to notify the controller it should be able to call some getController() method. Then when you create an instance of the JFrame from the Controller you pass it a reference to itself using the 'this' keyword. I'm happy to post code if necessary, but it's more a problem of 'how do I do this?' than fixing something that is broken.Д®xtend the JFrame with your own JFrame, which has an overloaded constructor that takes an instance of the Controller. Basically, I want to add a button into the JFrame that will call a method in the controller class when clicked.

How to save a bluej program as .java how to#

I'm kind of stumped as to how to accomplish this. Now, I want to add a button into the JFrame that signals the controller I want to 'move on' the simulation. When I run the project, the main makes a controller, which makes a JFrame.

In the controller cass I have an object of the JFrame class. In the main class and method, I have an object of the Controller class. Long story short, (among others) I have a controller class and a JFrame class.

I'm pretty far into it, but I came across a problem I haven't had before. Firing a method in my Controller class from a button in my JFrame class So I'm doing a project for school where I'm supposed to simulate a supermarket.