title: Problem in System.out.println statement
body: <p>Whenever we write any statement to print to console in Java program:</p>
  
  <p><code>System.out.print</code> or <code>System.out.println</code></p>
  
  <p>In above both statements we're calling out reference variable of PrintStream object without explicitly importing java.io package, so how we're accessing that object methods without resulting any compile time error?</p>