This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
If you are talking about the .length attribute of arrays, the answer is pretty simple - it's not a method. You might say it's something like a public final int field - you can read it but not change it.