Inheritance in Java

In this video we will see how inheritance works in java and how to use extends keyword in java to create subclasses from super classes.
Notes will be made available at the end of the chapter.

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13:30 Yes we can use 'getY' and 'setY' in derived class as the derived class contains both X as well as Y

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H.W
using getter and setter:
class animal{
String speak;

public String getSpeak() {
return speak;
}

public void setSpeak(String speak) {
this.speak = speak;
}
}

class Dog extends animal{
String bark;

public String getBark() {
return bark;
}

public void setBark(String bark) {
this.bark = bark;
}
}

public class Inheritance {
public static void main(String[] args) {
//extend class dog with animal
Dog m = new Dog();
m.setBark("i am a dog");

m.setSpeak("i am a cat ");

//without extend class animal
animal n = new animal();
n.setSpeak("i am a cat");

}
}


using methods:
class animal1 {
public void walking() {
System.out.println("Animal can walk");
}

public void eat() {
System.out.println("Animal can eat");
}

}
class Dog1 extends animal1 {
public void bark() {
System.out.println("Dog can bark");
}
}


public class Inheritance1 {
public static void main(String[] args) {
animal1 m = new animal1();
m.walking();
m.eat();
// m.bark(); will throw an error because m.eat() is not present in class animal
Dog1 d = new Dog1();
d.bark();
d.walking();
d.eat();
}
}

[khizrshaikh]

13:20
Yes sir we can use sety and gety in derived because y is present in derived

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[vishalpatil-uxem]

13:30 yes we can use 'Y' because we can access the properties of parent class in child class as well as we can add additional feature in it...

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