Exception on thread "main" java.lang.NoClassDefFoundError: org / springframework / boot / SpringApplication

Just joined and just started learning spring boot. I wrote my first application that looks like this:

SpringBootApiApp.java

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication

public class SpringBootApiApp {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootApiApp.class, args);
    }

}

      

        
        
        
      

    

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>io.springbootquickstart</groupId>
  <artifactId>SpringBootQuickStart</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>SpringBootApplication</name>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.2.RELEASE</version>
  </parent>

  <dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>    
    </dependency>
</dependencies>

  <properties>
    <java.version>1.8</java.version>
  </properties>

</project>

      

        
        
        
      

    

When I run java class in STS as Java application, I see below error, I don't see compilation error: Please help me fix this.

Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/boot/SpringApplication
    at SpringBootApiApp.main(SpringBootApiApp.java:9)
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.SpringApplication
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 1 more