title: Java in Eclipse: generating .class file automatically
body: <p>when I change my foo.java file in Eclipse there are no changes in the foo.class inside the bin folder.</p>
  
  <p>I think there must be a way that Eclipse change this automatically when altering an foo.java file?</p>
  
  <p>I even can't make it manually.</p>
  
  <p>Hope you can help me.</p>
  
  <p>Thanks</p>