This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Do you have an environment variable called "JAVA_HOME"? If not, create one, and assign it the value of the path to the Java installation you want to use. Then in your PATH variable, add %JAVA_HOME%\bin.