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VOOZH | about |
In Go language, the interface is a collection of method signatures and it is also a type means you can create a variable of an interface type. As we know that the Go language does not support inheritance, but the Go interface fully supports embedding. In embedding, an interface can embed other interfaces or an interface can embed other interface’s method signatures in it, the result of both is the same as shown in Example 1 and 2. You are allowed to embed any number of interfaces in a single interface. And when an interface, embed other interfaces in it if we made any changes in the methods of the interfaces, then it will reflect in the embedded interface also, as shown in Example 3.
Syntax:
type interface_name1 interface {
Method1()
}
type interface_name2 interface {
Method2()
}
type finalinterface_name interface {
interface_name1
interface_name2
}
or
type interface_name1 interface {
Method1()
}
type interface_name2 interface {
Method2()
}
type finalinterface_name interface {
Method1()
Method2()
}
Example 1:
Output:
Author Name: Mickey Branch: Computer science and passing year: 2012 College Name: XYZ Salary: 50000 Published articles: 209 Pending articles: 100
Explanation: As shown in the above example we have three interfaces. Interface 1 and 2 are simple interfaces and interface 3 is the embedded interface which holds both 1 and 2 interfaces in it. So if any changes take place in the interface 1 and interface 2 will reflect in interface 3. And interface 3 can access all the methods present in interface 1 and 2. Example 2:
Output:
Author Name: Mickey Branch: Computer science and passing year: 2012 College Name: XYZ Salary: 50000 Published articles: 209 Pending articles: 100
Explanation: As shown in the above example we have three interfaces. Interface 1 and 2 are simple interfaces and interface 3 is the embedded interface which holds both 1 and 2 interfaces method signatures in it. So if any changes take place in the interface 1 and interface 2's methods it will not reflect in interface 3 until we define explicitly in interface 3. And interface 3 can access all the methods present in interface 1 and 2 only if those mentioned in interface 3. Example 3:
Output:
Author Name: Mickey Branch: Computer science and passing year: 2012 College Name: XYZ Salary: 50000 Published articles: 209 Pending articles: 100 Total number of picked articles: 58 Author Id: 3087 Post: Technical content writer
Explanation: As shown in the above example we have three interfaces. Interface 1 and 2 are simple interfaces and interface 3 is the embedded interface which holds both interface 1's method signatures, interface 2 and it's own method in it. So if any changes take place in the interface 2's method it will reflect in interface 3. And interface 3 can access all the methods present in it including interface 2. We can only access interface 1's method which signature define in interface3.