It is a mechanism in which one object acquires all the properties and behaviors of parent object.
It is a building block. It is the property by which an object acquires properties and behaviors of another object.
Example: Parent-child relationship here child is inherit of parent properties and behaviors.
Types of Inheritance: There are three types of inheritance shown in figure below.
1. Single Inheritance : In this we can have single base class and n number if drive class.
Example:-
class a
{
int a;
void display()
{
System.out.println(“Display method”);
}
class b extends a
{
}
}
2. Multi Level inheritance :
It is just concept of grand parent class child class inheritance of parent class and parent-class is inheritance of grand-parent-class so in this case grand parent-class is implicitly inheriting the properties and the method of grand-parent along with parent-class that’s is called multi level inheritance.
## For example 1.
class A
{
System.out.println(“Grand-parent-class”);
}
class B extends A
{
System.out.println(“Parent-class inheritance of grand-parent”);
}
class C extends B
{
System.out.println(“child-class inheritance of parent-class”);
}
## Example 2.
package com;
/**
*
* @author pradeep
*/
class bike{
public bike()
{
System.out.println(“Class bike”);
}
public void vehicleType()
{
System.out.println(“Vehicle Type: bike”);
}
}
class hero extends bike{
public hero()
{
System.out.println(“Class hero”);
}
public void brand()
{
System.out.println(“Brand: hero”);
}
public void speed()
{
System.out.println(“Max: 70Kmph”);
}
}
public class honda extends hero{
public honda()
{
System.out.println(“honda : 80kmph”);
}
public void speed()
{
System.out.println(“Max: 120Kmph”);
}
public static void main(String args[])
{
honda obj=new honda();
obj.vehicleType();
obj.brand();
obj.speed();
}
}
Output : Output of this program is below.
run:
Class bike
Class hero
honda : 80kmph
Vehicle Type: bike
Brand: hero
Max: 120Kmph
BUILD SUCCESSFUL (total time: 1 second)
3. Multiple Inheritance :
In this we can have n numbers of parents and a single class which drives from it.
## For Example 1.
class A
{
void display()
{
}
class B
{
void display()
{
}
class C extends A,B
{
C C1=new C1();
C1.disp();
}
}
}
## Example 2.
/**
*
* @author pradeep
*/
public class MultipleInheritance
{
}
interface A
{
public void MultipleInheritance();
}
interface B
{
public void MultipleInheritance();
}
class MeltiDemo implements A, B
{
public void MultipleInheritance()
{
System.out.println(” Multiple inheritance”);
}
}
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