How to do it...

1. Open the Jenkins dashboard.
2. Go to Manage Jenkins.
3. Go to Global Tool Configuration to configure tools, their locations, and automatic installers.
4. Go to the JDK section.
5. Give the Name and tick the Install automatically option; provide details for the Oracle account to download JDK successfully.
6. You can give a logical name such as JDK 1.7 or JDK 1.8 to identify the correct version while configuring a build job.
7. You can add multiple JDKs based on the version, so if different applications require different JDKs then the scenario can be managed easily by adding JDK in Jenkins: