Wonderful IDEs like Eclipse offer control+space content assist presenting a drop-down list of tokens that match what you have typed in so far.
Eclipse offers another completion though - word completion. Press control+/ and Eclipse will fill in the token automatically with the first case sensitive match for what you have typed so far.
Press control+/ again... and again... to cycle through all the matches. If you are in a method with a local variable called myLocalVar, type myL, then press control+/ and Eclipse will complete myL for you, making it myLocalVar.