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2 queries.

 
Greenhorn
Posts: 22
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Can a frame be added to a Container?
Can an anonymous class extend an abstract class?
 
Ranch Hand
Posts: 5399
1
Spring Java
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ans 1: sorry
ans 2: Yes(I think) annonymous class can extend abstract class
<pre>
AbstractClassName acn = new AbstractClassName {
void method1ToImplementOfAbstractClass(){
S.o.p("I have been implemented by annonymous class");
}
</pre>
I think it should work.
Check it and tell me too
CMIW


------------------
Regards
Ravish
 
Ranch Hand
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Originally posted by Sartaj Syed:
Can a frame be added to a Container?
Can an anonymous class extend an abstract class?


If Applet be consider as a Container, So the answer is YES.
You can add a frame to an Applet
 
Ranch Hand
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Hi,
q1:
No, you cannot add a Window (so no Frame, no Dialog) to a container.
But I am wondering why, perhaps I was to fast but I didn't see that in the API documentation.
import java.awt.*;
public class A extends Panel
{
A()
{
add(new Frame("mamuba"));
}
public static void main(String args[]) //2
{
A a = new A();
}
}
and this is what I have obtained at run time
Exception in thread "main" java.lang.IllegalArgumentException: adding a window t
o a container
at java.awt.Container.addImpl(Unknown Source)
at java.awt.Container.add(Unknown Source)
at A.<init>(A.java:7)
at A.main(A.java:11)

q2.
Yes, I think that an anonymous class can extend an abstract class, check the following code:

class C
{
public static void doSomething(B b)
{
System.out.println("in c...");
}
}

abstract class B
{
abstract public void f();
}
public class A extends C
{
public static void main(String args[])
{
doSomething(
new B()
{
public void f()
{
System.out.println("bla");
}
}
);
}
}
..Cristian

 
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