title: NoClassDefFoundError generated from Spring Tool Suite wizard
body: <p>I was instructed to make use of the STS (Spring Tool Suite) for a java course I am enrolled in.  I have downloaded STS version 3.9.3 with platform Eclipse Oxygen 3 (4.7.3).</p>
  
  <p>When I start up STS, I do the following:</p>
  
  <ol>
  <li><p>Click File -> New -> Import Spring Getting Started Content</p></li>
  <li><p>I do a search on rest</p></li>
  <li><p>I select rest services with a code set of initial and complete</p></li>
  <li><p>Once the application is generated, I navigate to the gs-rest-service-complete/src/main/java/hello subdirectory and I see Application.java, Greeting.java, and GreetingController.java.</p></li>
  <li><p>I click on the green run button and I get the following output in the console:</p>
  
  <pre><code>Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/util/Assert
  at org.springframework.boot.SpringApplication.&lt;init&gt;(SpringApplication.java:263)
  at org.springframework.boot.SpringApplication.&lt;init&gt;(SpringApplication.java:247)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:1246)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:1234)
  at hello.Application.main(Application.java:10)
  Caused by: java.lang.ClassNotFoundException: org.springframework.util.Assert
  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)
  ... 5 more
  </code></pre></li>
  </ol>
  
  <p>I did not make any modifications to any configuration settings or any code.  I am brand new to this application and java programming. Why would I be getting this error?  How do I resolve it?</p>
  
  <p>Thank you.
  Jonathan</p>