INTERVIEW QUESTIONS J2EE JAVA DETAILS

Question: Why JAVA not support multiple inheritance? How can we pass address of an object?

Answer: In java first edition there is no multiple inheritance,but later editions they provided indirect multiple inheritance by interfaces and extends.

In java first edition there is no multiple inheritance,but later editions they provided indirect multiple inheritance by interfaces and extends. Source: CoolInterview.com

Java does not support multiple inheritance because it leads to confusion to the programmer. It is prove in the following ex.

Class A
{
int x;
}
Class B
{
int x;
}
Class c extends A,B
{
x=10;// Java compiler does not //know whether it is x of class A //or x of class B.
}
in java
Class C extends A,B
Multiple inheritance is achieved by using single inheritence.

ex;
Class A
{
int a;
}
class B extends A
{
int b;
}
class C extends B
{
a=10;
b=20;
}
we can pass add of an obj as follows
Class A
{
A(int add)
{
int address=add;
System.out.println("Address="+add);

}
}
Class Addr
{
public static void main(String args[])
{
A add=new A(add);
}
}


Source: CoolInterview.com

I think example given above for Passing address of object is incorrect. and every object is passed by reference in java Source: CoolInterview.com

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