Created
April 11, 2016 21:09
-
-
Save malalanayake/16162cea76bea09307a74978bf5028e1 to your computer and use it in GitHub Desktop.
Liskov's Substitution Principle - Bad sample code
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package sample.design.liskov.substitution.bad; | |
/** | |
* | |
* Distibution under GNU GENERAL PUBLIC LICENSE Version 2, June 1991 | |
* @author dmalalan | |
* @created Apr 11, 2016 3:52:15 PM | |
* | |
* @blog https://malalanayake.wordpress.com/ | |
*/ | |
public class Car extends Vehicle { | |
@Override | |
public void setRimSize(float rimSize) { | |
super.setTireSize(rimSize); | |
} | |
@Override | |
public void setTireSize(float tireSize) { | |
super.setRimSize(tireSize); | |
} | |
@Override | |
public void initEngine() { | |
System.out.println("[START:Car Engine]"); | |
} | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package sample.design.liskov.substitution.bad; | |
/** | |
* | |
* Distibution under GNU GENERAL PUBLIC LICENSE Version 2, June 1991 | |
* | |
* @author dmalalan | |
* @created Apr 11, 2016 3:57:49 PM | |
* | |
* @blog https://malalanayake.wordpress.com/ | |
*/ | |
public class LSPTest { | |
public static void main(String[] args) { | |
Vehicle vehicle = new Vehicle(); | |
vehicle.setRimSize(10); | |
vehicle.setTireSize(12); | |
vehicle.initEngine(); | |
vehicle.print(); | |
Vehicle car = new Car(); | |
car.setRimSize(10); | |
car.setTireSize(12); | |
car.initEngine(); | |
car.print(); | |
} | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package sample.design.liskov.substitution.bad; | |
/** | |
* | |
* Distibution under GNU GENERAL PUBLIC LICENSE Version 2, June 1991 | |
* | |
* @author dmalalan | |
* @created Apr 11, 2016 3:41:57 PM | |
* | |
* @blog https://malalanayake.wordpress.com/ | |
*/ | |
public class Vehicle { | |
private float tireSize; | |
private float rimSize; | |
public float getTireSize() { | |
return tireSize; | |
} | |
public float getRimSize() { | |
return rimSize; | |
} | |
public void setTireSize(float tireSize) { | |
this.tireSize = tireSize; | |
} | |
public void setRimSize(float rimSize) { | |
this.rimSize = rimSize; | |
} | |
public void initEngine() { | |
System.out.println("[START:Vehicle Engine]"); | |
} | |
public void start() { | |
System.out.println("[ENTER:KEY]"); | |
initEngine(); | |
System.out.println("[INIT:DashBoard Connection]"); | |
} | |
public void print() { | |
System.out.println("RIM Size:" + rimSize + " TIRE Size:" + tireSize + ""); | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment