title: Eclipse running previous program
body: <p>It is a new problem. I copy paste a program and try to run it in eclipse. But the eclipse keeps running an older program. I have no idea what is going on. ( I saved the program as someone on the internet suggested) In the run button, there are only old programs. So I goes into the run configuration option and double clicked the java application option and somehow the one I am working on right now appeared. And I am able to compile and run the current one. So technically I solved the problem, but I would like an explanation, what was going on?</p>
  
  <p><a href="https://i.stack.imgur.com/TJUm9.png" rel="noreferrer"><img src="https://i.stack.imgur.com/TJUm9.png" alt="enter image description here"></a></p>