The Java Program: Access.java

  1 // Access.java -- illustrate access to predefined packages
  2 
  3 // No import statement required for package "java.lang"
  4 
  5 public class Access {
  6 
  7    public static void main (String args[])  {
  8 
  9       // class "System" is defined in package "java.lang"
 10       // "out" is class variable of type "java.io.PrintStream"
 11       // "println" is an overloaded method in class "PrintStream"
 12 
 13       // class "Math" is also defined in package "java.lang"
 14       // "PI" is a constant class variable of type "double"
 15 
 16       System.out.println (Math.PI);
 17 
 18    }
 19 }