At first, you can convert your project to Ant or Maven.
Once your code is converted to Maven, you can download and setup Jenkins.
Once your Jenkins setup is ready, you can go to http://localhost:8080 on your web browser to access the Jenkins dashboard.
Configure Jenkins:
1.Go to Manage Jenkins->Configure System
2.Configure JDK
-Give the JDK name
-JAVA_HOME : C:\Program Files\Java\jdk1.7.0_45
3.Maven configuration
-Give a maven name
-MAVEN_HOME : C:\apache-maven-3.2.5\apache-maven-3.2.5-bin\apache-maven-3.2.5
4.Global Maven_OPTS
–Xmx512m
–XX:MaxPermSize=128m
5.Save once done
In Jenkins you can create new Job -> Select Maven project, enter project name -> click Ok
On the Job configuration page, enter SCM details and click on "SAVE" button.
Hope that helps!