Spring Boot cannot start server - spring

Question

I am building a spring-boot service, but when I start run 'spring boot app' the server cannot start and I cannot access to localhost:8080. I research some topic but cannot find solution right now.
This is my pom file :
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
when I run the application the log file console :
2018-10-24 23:11:51.350 INFO 5492 --- [ main] com.example.demo.DemoApplication : Starting DemoApplication on Welcomes-PC with PID 5492 (C:\Users\Welcomes\Documents\workspace-spring-tool-suite-4-4.0.0.RELEASE\demo\target\classes started by Welcomes in C:\Users\Welcomes\Documents\workspace-spring-tool-suite-4-4.0.0.RELEASE\demo)
2018-10-24 23:11:51.354 INFO 5492 --- [ main] com.example.demo.DemoApplication : No active profile set, falling back to default profiles: default
2018-10-24 23:11:51.401 INFO 5492 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext#40e6dfe1: startup date [Wed Oct 24 23:11:51 ICT 2018]; root of context hierarchy
2018-10-24 23:11:52.187 INFO 5492 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-10-24 23:11:52.201 INFO 5492 --- [ main] com.example.demo.DemoApplication : Started DemoApplication in 1.142 seconds (JVM running for 1.71)
2018-10-24 23:11:52.204 INFO 5492 --- [ Thread-3] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext#40e6dfe1: startup date [Wed Oct 24 23:11:51 ICT 2018]; root of context hierarchy
2018-10-24 23:11:52.207 INFO 5492 --- [ Thread-3] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown
I cannot see the Tomcat initializatied with port(s) : 8080. Does I miss some steps? I'm using JDK jdk1.8.0_191