Like classes, interfaces can also be extended. This is done by the keyword extends as follows

Example

interface A extends B
{
	// Body of A
}

Example

interface SilanSoftware
{
	int x=10;
	string name="Mona";
}
interface SilanTechnology extends SilanSoftware
{
	void show( );
}

NOTE:

• • Here the interface SilanTechnology will inherit both the constants x and name. It is pointed that the variable x and name are declared as simple variables. it is allowed because all the variables in an interface are treated as constants although the keyword final or static are not present.
• • According to the concept of interface, it is possible to combine several interfaces together into a single interface. For example

Example:

interface A
{
    int x=10;
    string name="Mona";
}
interface B
{
	void show( );
}
interface Demo extends A,B
{
	- - - -
	- - - -
}