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.
Good morning, I am new to Java and currently learning the basics. I have more than 1 JDK version installed on my PC. When I type java -version at the command prompt, how does the system know which version to select.