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Calling a class in another package
Packages example from a Well House Consultants training course
More on Packages [link]
Source code: Hattie.java Module: J708
/* A sample application (similar to Geraldine.java) but here we have
separated the class for the pets into a separate file - and indeed a separate package (package "gowdie" and class in it "Isobel".) Whenever we specifically say something about an "Isobel", we have to remember that it's an Isobel in gowdie. But once Java knows that an object is a gowdie.Isobel, there's then no need to keep giving the type - polymorphism works that out for you. */ public class Hattie { public static void main (String [] args) { gowdie.Isobel [] Pets = new gowdie.Isobel[4]; Pets[0] = new gowdie.Isobel("Gypsy",4,7); Pets[1] = new gowdie.Isobel("Charlie",12); Pets[2] = new gowdie.Isobel("Dunno",5,8); Pets[3] = new gowdie.Isobel(4,8); for (int p=0; p<Pets.length; p++) { gowdie.Isobel Halliwell; Halliwell = Pets[p]; float ca = Halliwell.getEffAge(); String nayme = Halliwell.name; System.out.println(nayme+ " is "+ca); } int mouths = gowdie.Isobel.getCount(); System.out.println("You have " + mouths + " animals"); } } /* wizard:java graham$ java Hattie Gypsy is 28.0 Charlie is 72.0 Dunno is 40.0 - is 32.0 You have 4 animals wizard:java graham$ */ Learn about this subject
This module and example are covered on the following public courses:
* Learning to Program in Java * Java Bootcamp * Java Programming for the Web Also available on on site courses for larger groups Books covering this topic
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