Is it possible for Eclipse to only open one JFrame?

Question

When run the project second time, can the previous JFrame closed before open the new one ?

So I no need to close the JFrame when trying to run the project second time.

Is it possible to open only one JFrame?

Answer 1

Eclipse has the possibility of terminating the launched program before starting the new one: It is called Terminate and Relaunch (see the Documentation).

You can bind this to any shortcut you like (Window -> Preferences -> General -> Keys).

Answer 2

Apparently, eclipse offers some special options to get what you want.

For other people who might be using a different editor: it's possible, but you'd need some kind of communication between the processes.

What you can do is this, make a server application that runs independently and have it open before you start your regular application. When you run your regular application, connect to the server. This server now messages the other application that was running to close down.

If running a server application is too much trouble, you can run both the server and the client in the same application. When you start the application, check if the designated port is busy, if not, create a server. If it is busy, connect to the server and tell it to shut down. After that, open the server socket in the new application.

Answer 3

Select the Terminate and Relaunch command [ Terminate and Relaunch ] to first terminate the selected debug target and secondly, relaunch it.

Once a launch is terminated it can be automatically removed from the Debug View. To change this setting use the Opens the Launching preference page Run/Debug > Launching preference page.

Answer 4

you may find relaunch-plugin for eclipse useful for your case.