title: Netbeans GUI: JTable with Double cell adds to current entry when typing instead of replacing
body: <p>I have a GUI designed as a Form in Netbeans 7.2.  I have a JTable with the troublesome behavior.  The table model is designed with Right-Click -> Properties -> Model and setting up 1 row and 12 columns with types Long and Double for editable number fields.</p>
  
  <p><img src="https://i.stack.imgur.com/zlCup.png" alt="enter image description here"></p>
  
  <p>Now if I navigate to such a cell which contain e.g. "0.0" and just start typing "123" I get "0.0123" instead of "123".  I would like it to work that if you just start typing you start with a blank value - and if the entry is "clicked" then you start editing the cell and whatever you type is inserted at the cursor location.</p>
  
  <p>Can this be done easily?</p>