Interfaces in Java allow for multiple inheritance by defining abstract methods that implementing classes must define. An interface uses the "interface" keyword and declares abstract methods without definitions, while classes that implement the interface must provide definitions for all interface methods. Interfaces provide a way for unrelated classes to share a common behavior via method signatures defined in the interface.

1. Interfaces in java

2. interface
 Interface Is like class ,interface can have method and variable.
 Method declared in interface are by default abstract.
 Solution for multiple inheritance
 Uses keyword “interface” .
 A class that implements an interface must implement all methods declared
in the interface

3. syntax
Interface <interface_name>
{
//declare method
}

4. To implement an interface in Java, you
need to follow these steps:
 1. Declare the interface
 2. Implement the interface

5. Class vs interface
Class interface
Can declare method Can declare method
Can define method Cannot define
Can create objects Cannot create objects

7. Thankyou