Liskov Substitution Principle

Sumit Rawal answered on September 9, 2022 Popularity 10/10 Helpfulness 1/10

answer Liskov Substitution Principle

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Liskov Substitution Principle

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class Test {

   static void getAreaTest(Rectangle r) {
      int width = r.getWidth();
      r.setHeight(10);
      System.out.println("Expected area of " + (width * 10) + ", got " + r.getArea());
   }

   public static void main(String[] args) {
      Rectangle rc = new Rectangle(2, 3);
      getAreaTest(rc);

      Rectangle sq = new Square();
      sq.setWidth(5);
      getAreaTest(sq);
   }
}

Popularity 10/10 Helpfulness 1/10 Language java

Source: www.freecodecamp.org

Tags: java liskov-substitution-principle

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Contributed on Aug 25 2023

Sumit Rawal

0 Answers Avg Quality 2/10

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benefits of liskov substitution principle

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- The code is loosely coupled and avoids unnecessary entanglements.
	Without LSP, when a subclass cannot substitue its parent class,
    we have to write multiple if-else statements to determine the class or
    the type to handle certain cases differently.
	Changes should be applied in many places
- Violtion - Square inheriting from a Rectangle

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Source: Grepper

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Contributed on Sep 09 2022

Shristi Gautam

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Liskov Substitution

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public class MotorCar implements Car {

    private Engine engine;

    //Constructors, getters + setters

    public void turnOnEngine() {
        //turn on the engine!
        engine.on();
    }

    public void accelerate() {
        //move forward!
        engine.powerOn(1000);
    }
}
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Popularity 10/10 Helpfulness 1/10 Language java

Source: www.baeldung.com

Tags: java

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Contributed on Aug 25 2023

Sumit Rawal

0 Answers Avg Quality 2/10

Liskov Substitution Principle

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