MyEclipse 2016 does not have the Spring Boot libraries included at this time.You can either download the Spring Boot libraries manually and add them to the project’s classpath or add them through Maven dependencies.
While MyEclipse does not have the Spring Boot libraries included, it does support Spring Boot launchers.
Please check the Launch Configurations wizard for Spring Boot. Spring Boot preferences are also available under Window > Preferences > MyEclipse > Spring > Spring Boot.
Hope this helps. Let us know if you have any questions.