Simeon Cherniy

Hello.
I've the following problem and I can't understand it.

The static method of my class (A) was called from the business method of the session bean (CMT).

Firstly, my class was like:

public class A { private static A a = new A(); public static A getInstance() { return a; } //methods ... }

In the session bean I call the method of this class:

A.getInstance().methodName();

Here I had the NoClassDefFoundError (from log-file).

After I had replased the code:

public class A { private static A a; public static A getInstance() { if(a == null) { a = new A(); } return a; } ... }

It works fine.

But I don't understand the reason of the first error.

What does happen with the EJBObject on the server side and its stub on the client side?
Are they removed or not?

Hi all!
There is a question:

In the book "SCBCD Exam Study Kit" the author Paul Sanghera writes:

Can client use EJB
object reference after
calling a successful
remove()?

the answer is:

Stateless Session Bean: No. If used, it will receive
an exception.

I tried to call remove method on the var, that reffers to the EJBObject of the session bean instance, and after call business - method. I didn't catch any exception. I carried out this experiment with Bea WebLogic 8 server and JBoss server.

In the EJB 2.0 spec I hasn't found any information.

Could you clear my mind?

Thanks!
[ June 04, 2007: Message edited by: Simeon Cherniy ]

Hello!

I have a question.
I have the class
public class Test implements Serializable
{
public TestTwoClass classTwo = new TestTwoClass();
public int i;
...
}

After serialization and deserialization will the variable 'classTwo' reffer to the object TestTwoClass?

Are there any requirements to the TestTwoClass?

If TestTwoClass is not serializable, what value will the variable 'classTwo' has?

Thanks!

[ June 04, 2007: Message edited by: Simeon Cherniy ]
[ June 04, 2007: Message edited by: Simeon Cherniy ]

Hi all!

Autocomplete means the panel in which we could select the word to end the current word.

I have a problem in implementation of autocomplete function (like in Eclipse or IntelliJIdea)

I have:
1. Applet
2. JPanel
3. JEditorPane
4. JScrollPane for JEditorPane

Applet contains Jpanel, Jpanel contains JScrollPane.

I have a listener and I can to cath event of keyReleased(for ex. DOT) in JEditorPane.

How to realize the panel, which contains the set of words to complete the current one?

public void keyReleased(KeyEvent keyevent) { char keyCahar = keyevent.getKeyChar(); if(keyCahar == '.') { Point point = editorPane.getCaret().getMagicCaretPosition(); // some logic to build the set of words to comlete the current one // the code to create the panel with the set of words in the point POINT (specified above) } }


What should be after second comment?

Thanks!

I have resolved this problem.
The problem was, that constructor (by default) of inner class required an instance of outer one

May be I wrote not clear:

I have:
1. Outer out = new Outer();
2. String str = "Inner";
3. Outer.Inner in = null;

I want:
in = an instance of inner class.

Suppose you don't know about is there inner-class with name "Inner" or not. And you can't write new Outer().new Inner()

Thanks!

Hi, all!

There is a question.
I have the classes:

public class Outer { public class Inner{ } }

I want to create the instance of Inner class using name of inner-class ("Inner") and the instance of Outer.
Like this:

Object obj = Class.forName("Outer$Inner"); - this code is valid only if Inner class is static. But it is not static in my case.

Thanks all

SCJP1.4 passed with 83%.
It's not very good result but it opens the gateway to prepare and pass next more interesting and more complicated exam.
Neares aim is SCBCD :-)
Greetings from Moscow!

SCJP 1.4

Hi, all!
Could you advise me which of mock exams (from Mock Exam List) are more complicated and which the nearest to the real exam.

I have passed Marcus Green's Mock Exam (1 and 2) and my results are about 83%.

Thanks

Hi all!

I have ordered the voucher for test.
1. How long will Sun proceed this order?
2. What term of validity does voucher have?

Thanks

Hi all!

I have ordered the voucher for test.
1. How long will Sun proceed this order?
2. What term of validity does voucher have?

Thanks

Hallo! :-)
I have a question:
Example code:
public class TopLevel { public class Inner{ public void print() { System.out.println("Hallo!"); } } } public class Tester { Test test = new Test(); Test.Inner inner = test.new Inner(); test = null; System.gc(); inner.print(); } Result: Hallo!

I read that the object of inner class has "reference" to the object of top level class.

1. What kind of "reference" is it?
2. What does happen after calling System.gc() in code above?
3. Is object of class Test removed from the heap?

Thank you.

P.S. If there are any errors in the code, takes it easy, not as mistake :-)

[ September 17, 2006: Message edited by: Simeon Cherniy ]
[ September 17, 2006: Message edited by: Simeon Cherniy ]

Of cource, we can't be sure of completion of finally block . But the finally block will be executing until it is not finished. If finally block throw exception than on the top of stack trace we will have this exception