Inheritance -- Implements,inte rface...

[reon]

Hi

In this program i tried implements,inhe ritance (I tried multiple inheritance in C++).
In C++ I knew that multiple inheritance means we can invoke all classes and class functions from derived class itself with an object...
I tied that same idea in Java , but in java it is a flop to me...
I tried inheritance using implements and interface in java...

If anybody having any idea or know how can repair this code please tell me...
Now also i think that i can directly call outer class methods from derived class of java with an object...

class class1
    {
    public class1()
    {
    System.out.println("Class 1");
    }
    }
interface class2
    {
    public void class2();
    public void class3();
    }
class class3 implements class2
    {
    public class3()
        {
        System.out.println("Class 3");
        }
    public void class2()
        {
        System.out.println("Class 2");
        }
    }
class class4 extends class1 implements class2
    {
    public class4()
    {
    System.out.println("Class 4");
    }
    public void class2()
        {
        System.out.println("Class 2");
        }
public static void main(String args[])
{
class4 c1=new class4();
c1.class2();
c1.class3();
}
}
 
 

[teddarr]

I'm a newb to Java, but one thing I do know is that unlike C++, Java does not allow multiple inheritance.

My only reference is that I am taking both classes this semester and the instructor pointed out this exact situation.

[r035198x]

Hi

In this program i tried implements,inhe ritance (I tried multiple inheritance in C++).
In C++ I knew that multiple inheritance means we can invoke all classes and class functions from derived class itself with an object...
I tied that same idea in Java , but in java it is a flop to me...
I tried inheritance using implements and interface in java...

If anybody having any idea or know how can repair this code please tell me...
Now also i think that i can directly call outer class methods from derived class of java with an object...

class class1
    {
    public class1()
    {
    System.out.println("Class 1");
    }
    }
interface class2
    {
    public void class2();
    public void class3();
    }
class class3 implements class2
    {
    public class3()
        {
        System.out.println("Class 3");
        }
    public void class2()
        {
        System.out.println("Class 2");
        }
    }
class class4 extends class1 implements class2
    {
    public class4()
    {
    System.out.println("Class 4");
    }
    public void class2()
        {
        System.out.println("Class 2");
        }
public static void main(String args[])
{
class4 c1=new class4();
c1.class2();
c1.class3();
}
}
 
 

Java does not support multiple inheritance directly.
You cannot implement a class, you implement interfaces. Read this for clarification.

[reon]

then anybody please tell me wats the use of implements and interface in java...
If java does not suppot multiple inheritance ...

Then how can i complete the task like this ; i mean multiple inheritance....

[r035198x]

then anybody please tell me wats the use of implements and interface in java...
If java does not suppot multiple inheritance ...

Then how can i complete the task like this ; i mean multiple inheritance....

Have you read the link that I gave you?