To use different JDK than the one which is on the default path. Use followings:
set path=<complete-path-of-new-jdk>;%path%
For example:
set path=C:\jdk1.8.0_151\bin;%path%
Example
Default JDK on path:
D:>java -version java version "10" 2018-03-20 Java(TM) SE Runtime Environment 18.3 (build 10+46) Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10+46, mixed mode)
Changing:
D:>set path=C:\jdk1.8.0_151\bin;%path%
After change:
D:>java -version java version "1.8.0_151" Java(TM) SE Runtime Environment (build 1.8.0_151-b12) Java HotSpot(TM) 64-Bit Server VM (build 25.151-b12, mixed mode)