In spring boot application we can reload source code changes without restarting server.When we develop java application if we do any changes in source code then developer need to application restart and for application up. But in spring boot project we can reload changes in source code without restarting server. For this you just add this dependency in your spring boot application pom file.
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>This spring boot feature help you develop application in fast way.