I am having a slight problem. I believe that my Netbeans is set to overwrite, so when ever I type something, it deletes whats in front of it. The editor cursor has also changed, from the usual vertical line, to a solid black block. Any Ideas?
Try pressing the Insert button on your keyboard. You can confirm this by looking the lower right hand corner a 'OVR' means you are in Overwrite mode, whereas 'INS' means you're in insert mode(the mode you want to be in).
vs.
See Wikipedia docs on Insert Key, also see highlighted button shown below: