javaeclipsewindows-10

Why does Eclipse show multiple application configurations when I try to run my application?

I get this pop up every time when I run my project. Will this be a problem in the future?

What I did, I was building up the project with the same name while changing the name of older builds, any ideas?

Pop-up menu:

Pop-up menu

Build tree:

Build tree

Solution

  • Why does Eclipse show multiple application configurations when I try to run my application?

    Because you have created all those configurations in your IDE. That's specific to IDE, and has nothing to do with Java

    I get this pop up every time I run my project.

    Because IDE doesn't know which is the configuration you want to use for running your application.

    If the question is:

    why do they exist?

    You may want to run different main methods, in different ways, with different arguments, and so on. That's why "Run Configurations" exist, to have a pre-configured running setups - you just choose one of them and run your application accordingly.