abstract classes
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/2124951/java-interface-abstract-classes-abstract-method">Java: interface / abstract classes / abstract method</a>  </p>
</blockquote>



<p>I have an abstract class with 4 methods.All these methods are abstract.
Is my abstract class equivalent to an interface?</p>

<pre><code>public abstract class ABC{
  abstract void f1();
  abstract void f2();
  abstract void f3();
  abstract void f4();
 }
</code></pre>

<p>Can anybody explain if it is not?</p>
