I have made a new Ionic / Cordova project and I\'m trying to build it on windows 8.1. I installed JDK and JRE 7 as well as android sdk and ant and added them to my path usin
There is one thing you can try is to set this variable JAVA_HOME to C:\Program Files\Java\jdk1.7.0_51\bin
Since you are using Windows, you can go to Control Panel to update it.
You were able to run java -version probably because it's included in the User's path.
java -version