title: using a class's instance in other class?
body: <p>When we the statement <code>System.out.println()</code> in java to output something on screen.
  In this statement <code>System</code> is the class, <code>out</code> is the object of that class, <code>println()</code> is the method of that class. </p>
  
  <p>When we declare an instance or object of, suppose, class A in class B, then following syntax is used, <code>A object;</code>, and then if there are any methods of the class, which have been declared as public, then in following syntax the methods are called, <code>object.method(argument)</code>.</p>
  
  <p>Now my question is that why we can't declare the object, <code>out</code>, of the class, <code>System</code>, in the following syntax, <code>System out = new System();</code>.</p>