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Interitance bundle + array, abstract, super, overload
Extending Classes and More example from a Well House Consultants training course
More on Extending Classes and More [link]
Source code: Interit2.java Module: J710
Interitance bundle + array, abstract, super, overload :::::::::::::: Bus.java :::::::::::::: /* Class to implement Bus Herbert = new Bus("Morriston","Mumbles","08:15",53,61); seats = Herbert.getCapacity(); Destiny = Herbert.getDestination(); */ public class Bus extends Transport { public Bus(String Destiny, String Source, String When, int duration, int seatsPerCarriage){ super(Destiny,Source,When,duration); seats = seatsPerCarriage; } public int getCapacity() { return this.getCapacity(true); } public int getCapacity(boolean standing) { if (standing) { return seats + 6; } else { return seats; } } } :::::::::::::: Train.java :::::::::::::: /* Class to implement Train London = new Train("Swansea","Paddington","04:30",180,8,60); int seats = London.getCapacity(); String Destiny = London.getDestination(); */ public class Train extends Transport { public int carriages; public Train(String Destiny, String Source, String When, int duration, int carriages, int seatsPerCarriage){ super(Destiny,Source,When,duration); seats = seatsPerCarriage; this.carriages = carriages; } public int getCapacity() { return this.getCapacity(true); } public int getCapacity(boolean standing) { if (standing) { return (int)(seats * carriages * 1.4); } else { return (int)(seats * carriages); } } } :::::::::::::: Transport.java :::::::::::::: abstract public class Transport { public String Destination; public String Source; public String Time; public int journeylength; public int seats; abstract int getCapacity(); abstract int getCapacity(boolean standingAllowed); public String getDestination () { return "To " + Destination; } public Transport (String Source, String Destiny, String When, int duration) { Destination = Destiny; this.Source = Source; Time = When; journeylength = duration; } } :::::::::::::: TranTestTwo.java :::::::::::::: public class TranTestTwo { public static void main (String [] args) { Transport [] options = new Transport[4]; options[0] = new Train("Swansea","Paddington","04:30",180,8,60); options[1] = new Bus("Morriston","Mumbles","08:15",53,61); options[2] = new Train("Swansea","Shrewsbury","06:30",300,2,75); options[3] = new Bus("Llansamlet","Neath","09:45",42,21); for (int k=0; k<options.length; k++) { int seats = options[k].getCapacity(false); int people = options[k].getCapacity(); String Destiny = options[k].getDestination(); System.out.println(Destiny + " " + seats + " " + people); } } } 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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This example comes from our "Extending Classes and More" training module. You'll find a description of the topic and some
other closely related examples on the "Extending Classes and More" module index page.
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