method throws exception is NOT inside a try/catch block. jbuilder does not show error

[Leonardo Penha]

I have a class called DataClient that calls the constructor of another class called Data in its constructor. The constructor of Data throws an IOException.
When I compile these two classes in JBuilder 6 or 7 they generate no errors even though the constructor of Data is not inside a try/catch block and the constructor of DataClient does not throw an exception.
It's weird because if I copy the call to the constructor of Data to another method inside DataClient class, I get an error at compile time asking me to either put this call in a try/catch block or declare that the method throws an exception.
is this a bug?
can anyone help me out?

[Ilja Preuss]

Could you please post the relevant code? That would make discussing it much easier...

[Leonardo Penha]

Ok. Here it goes:
file #1:
public class Data {
public Data(String dbname) throws IOException {
...
}
...
}
file #2:
public class DataClient {
private Data data;
public DataClient(String dbName) {
data = new Data(dbName);
...
}
...
public void close() throws RemoteException {
data.close();
}
}
---------------------------------------
The above code does not compile with jdk1.4 because Data constructor throws IOException,
but DataClient's constructor doesn't.
However, when I use JBuilder, it does!
The weird thing is that if I copy the first line on DataClient's constructor to the method close() of the DataClient class the code does not compile.

[Leonardo Penha]

I'm sorry. I think the code above will not compile. But if you add another constructor to DataClient (one that takes another kind of argument, of course) that throws an IOException, then it will compile, even though it shouldn't.

[Leonardo Penha]

It's definetely a bug!
try this:
file #1:
package applications;
import java.io.IOException;
public class ExceptionThrower {
public ExceptionThrower() throws IOException {}
}
file #2:
package applications;
import java.io.IOException;
public class ExceptionTest {
public ExceptionTest() {
new ExceptionThrower();
}
public ExceptionTest(String s) throws IOException {}
public static void main(String[] args) {
new ExceptionTest();
}
}
Try compiling both files, first from within JBuilder, then from the command line with the javac tool.
Then try commenting the second constructor on the file #2 and compiling both file again.
you'll see what I mean.
:-)