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POjavax:javaee-api-6.0 contains non-abstract classes with no method body
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  1. POjavax:javaee-api-6.0 contains non-abstract classes with no method body
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    copied!<p>I am fairly new to Java EE and when I look into the compiled code (I could not find the source code for javax:javaee-api-6.0), I notice this class.</p> <pre><code>package javax.servlet; import java.util.EventObject; public class ServletContextEvent extends EventObject { public ServletContextEvent(ServletContext paramServletContext); public ServletContext getServletContext(); } </code></pre> <p>However, the same class in javax:javaee-api-7.0 is this.</p> <pre><code>package javax.servlet; import java.util.EventObject; public class ServletContextEvent extends EventObject { private static final long serialVersionUID = -7501701636134222423L; public ServletContextEvent(ServletContext source) { super(source); } public ServletContext getServletContext() { return (ServletContext)super.getSource(); } } </code></pre> <p>The also happens to ServletException in the same package (there might be more, as I didn't go through each of them). </p> <p>Assuming Java Decompiler gave me what the source code looks like, from a pure java grammar point of view, I can't understand why the 6.0 classes are not abstract (or, not interfaces).</p> <p><strong>Question 1.</strong> Why are the classes in 6.0 not abstract or interfaces?</p> <p><strong>Question 2.</strong> Why is the implementation changed in 7.0? Did people realize the 6.0 version would cause trouble when you compile code with javaee-api? </p> <p>The reason I ask is because I actually got compile errors when using javaee-web-api (which has similar classes as javaee-api, see <a href="https://stackoverflow.com/q/16789020/842860">this</a>) in Intellij IDEA (12.1.4). The error looks like this:</p> <pre><code>Internal error: (java.lang.ClassFormatError) Absent Code attribute in method that is not native or abstract in class file javax/servlet/ServletContextEvent </code></pre> <p>So <strong>Question 3.</strong> Is there a way to avoid this in Intellij IDEA?</p>
 

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