What should I learn in Java SE before proceeding to Java EE?
<p>Currently, I've learned the following in Java SE:</p>

<ul>
<li>Logical Operations</li>
<li>Loops</li>
<li>Inheritance</li>
<li>Polymorphism</li>
<li>Abstract Classes</li>
<li>Interface</li>
</ul>

<p>I'm currently learning Strings, Characters and Regular Expressions. What are things that I should learn before proceeding to Java EE? </p>
