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I'm not a java expert or a eclipse expert. Currently I'm working on a project and i need to debug/test often. I use the eclipse run Button for it. But when I don't close the Program eclipse/java opens it again(second window). It's an gui app with swing jframe.
Is there a function in eclipse or java to terminate the previous build and opens the new one when you run it?
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before launching, press ctrl-F2 . This shortcut terminates the currently running/debugged application.
Open the debug view, select all, and click the big red box (or right-click and select "Terminate").
I want to prevent the user from running my java application multiple times in parallel. To prevent this, I have created a lock file when am opening the application, and delete the lock file when closing the application. When the application is running, you can not open an another instance of jar.
In eclipse when you Run/Debug an application a new instance is created. There are two options: When you run an application it opens up the UI/result in the console. Hence you have to stop the existing application by click on one of these:
To prevent this, I have created a lock file when am opening the application, and delete the lock file when closing the application. When the application is running, you can not open an another instance of jar.
There are already available java methods in File class to achieve the same. The method is deleteOnExit () which ensure the file is automatically deleted when the JVM exits. However, it does not cater to forcible terminations. One should use FileLock in case of forcible termination.
In Eclipse Neon go to Window -> Preferences -> Run/Debug -> Launching and in the Launch Operation section check:
[X] Terminate and Relaunch while launching
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