package com.baeldung.changeport; import java.util.Collections; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class CustomApplication { public static void main(String[] args) { SpringApplication app = new SpringApplication(CustomApplication.class); app.setDefaultProperties(Collections.singletonMap("server.port", "8083")); app.run(args); } }