SpringBootApplication can not be resolved to a type error in Spring tool suite and maven - eclipse

Question

I have created the maven project in spring tool suite. I created the pom.xml with required dependencies but facing error as "SpringBootApplication can not be resolved to a type".
I have tried a couple of solutions like Maven -> Update Project..., Clean Project, deleted local repository directory of Maven (.m2), etc... also I tried creating another maven project but still the same error.
I think this is eclipse spring tool suite problem with maven.
Is there any solution like patch by eclipse or anything else?
Thanks in advance!
Pom.xml as follows
<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.javabrains.springbootquickstart</groupId>
<artifactId>cource.api</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Java Brains Cource API</name>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-parent -->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.8.RELEASE</version>
</parent>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-parent -->
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.8.RELEASE</version>
<type>pom</type>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<properties>
<java.version>1.8</java.version>
</properties>
</project>

Answer 1

You did not add the correct dependencies.
You should add
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
as a dependency (in <dependencies>) instead of spring-boot-starter-parent.
Parent just defines the versions but does not actually add any dependency (you use it as a <parent> in Maven).
If you have test, also add spring-boot-starter-test.
I would also suggest to use https://start.spring.io/ to generate a working Spring Boot base project (also available from STS in File->new->Other->Spring Starter project).

Answer 2

<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.javabrains.springbootquickstart</groupId>
<artifactId>cource.api</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Java Brains Cource API</name>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.8.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<properties>
<java.version>1.8</java.version>
</properties>
</project>
Copy/Paste it in your POM.xml. Update the Maven project and it will fetch the required JARs.