jar file problem

[abhijit]

hello ,
i'm working on a simple java application..
whenever i create object of the main class in main() method
and try to run jar file from command prompt it' giving the error
"NoClassDefinitionFound".
otherwise the jar file is working absolutely fine.
but, my requirement is that i want to make object of same class in main()
and call one of it's non static method..

can anyone tell me whr i'm going wrong.

[Tolls]

You'll need to post some code, and the full error.

[Eranga]

Yes you must provide more details about the your question.

my requirement is that i want to make object of same class in main()

Is that the same class which contain the main method?

[abhijit]

1st of all sorry for not posting the code in code tags .
bcoz code tag button is not working in my browser . i don't know why.
hre is my code...
--------------------------------------------------------------------------
public class Main
{
public static void main(String[] args)
{
Main obj=new Main();
obj.doConstructorLogic();
}

private class giveConnection
{
.........
}

private class servicediscovery
implements DiscoveryListener
{
.........
}

private class devicediscovery
implements DiscoveryListener
{
........
}

public void doConstructorLogic()
{
System.out.println("In mains constructor logic");
serviceURL = null;
FinalUrl = null;
UStr = null;
cs = null;
hs = null;
testurl = null;
i = 0;
cnt = 0;
SrNo = -1;
Send_What_flag = "";
pin_cnt = 0;
error_cnt = 0;
redir_errrmsg_cnt = 0;
BT_Dev_cnt = 0;
try
{
local = LocalDevice.getLocalDevice();
discoveryAgent = local.getDiscoveryAgent();
System.out.println((new StringBuilder()).append("Local Device: ").append(local.getFriendlyName()).append(" : ").append(local.getBluetoothAddress()).toString()) ;
local.setDiscoverable(0);
giveConnection connobj = new giveConnection();
try {
conn = connobj.ConnectionType4Provider();
} catch (SQLException ex) {
ex.printStackTrace();
} catch (ClassNotFoundException ex) {
ex.printStackTrace();
}
try
{
try {
connobj.Empty_BT_Table(conn);
} catch (SQLException ex) {
ex.printStackTrace();
} catch (ClassNotFoundException ex) {
ex.printStackTrace();
}
try {
connobj.Empty_BT_Confirmation(conn);
} catch (SQLException ex) {
ex.printStackTrace();
} catch (ClassNotFoundException ex) {
ex.printStackTrace();
}
int n = connobj.Enter_info(conn);
System.out.println((new StringBuilder()).append("n :").append(n).toString());
}
catch(SQLException ex)
{
ex.printStackTrace();
}
catch(ParseException ex)
{
ex.printStackTrace();
}
}
catch(Exception e)
{
message = "Local Device Not Found";
return;
}
devicediscovery dd = new devicediscovery();
}

}
-------------------------------------------------------------------------


i can not make doConstructor Logic() method static bcoz all the variables it uses are nonstatic and due to some other limitations..
this code is working very properly in netbeans 5.5 ide but whenever i try to run the application from command prompt , its throwing the following error.

"
Exception in thread "main" java.lang.NoClassDefFoundError: javax/bluetooth/UUID
at test_bt.Main.<init>(Main.java:950)
at test_bt.Main.main(Main.java:54)
"

line 54 is that whr i'm creating Main's instance.

i'm using following command to run the file..

java -jar "Demo_BT.jar"

[Eranga]

DO NOT use Main for the class name in Java. It's reserved word in main method, entry point. Change it as soon as possible, very bad practice.

[Eranga]

Can you please tell me where the doConstructorLogic() method located, in which class?

[abhijit]

change the class name ,
but no difference . it's giving same error.

[abhijit]

doConstructorLogic() is located in same Main class, which name now i've changed.

[Eranga]

change the class name ,
but no difference . it's giving same error.

That's nothing to do with the error. I just said it's not good practice to use that word, reserved word. May cause many issues.

[Eranga]

doConstructorLogic() is located in same Main class, which name now i've changed.

If so, how you place classes within that Main class?

[abhijit]

i've already shown that in the code snippet provided earlier..
all the classes within main class are private..

[Tolls]

Um:
"NoClassDefFoundError: javax/bluetooth/UUID"
It's got nothing to do with Main...which is why I asked for the actual exception.
Which line is line 950?

[Eranga]

i've already shown that in the code snippet provided earlier..
all the classes within main class are private..

Yes, it's clear to me. The thing is when I looking at the code, seems part of them are missing, means the parenthesis.