System class in Java
<p>I'm learning <code>Java</code> and as I know only <code>abstract classes and interfaces</code> cannot be instantiated. However documentation of <code>java.lang.System</code> says that it cannot be <code>instantiated</code> which is neither abstract nor an interface.<br></p>

<p>I haven't got any explanation of it. Can somebody please explain this ?<br></p>

<p>Moreover Can somebody create such classes ?</p>
