Java

Re: Java Netbeans Error Regarding Arraylist in BufferedWriter Method

22-Dec-12 1:53

TorstenH. wrote:
Well, it's good to use different packages though.

True, but only if the design calls for it.

TorstenH. wrote:
he's developing his skills.

And that's the important bit.

One of these days I'm going to think of a really clever signature.

100,00122-Dec-12 13:12

100,001

22-Dec-12 13:12

I placed the method

public static void writeRecordsToFiles(ProductConsumer[] consumers)

in the ProductConsumer class, but Netbeans gave me the same error message, "cannot find symbol: method messageList(), location: class ProductConsumer," so I need to create a method messageList() in ProductConsumer. Thanks.

modified 22-Dec-12 19:21pm.

Re: Java Netbeans Error Regarding Arraylist in BufferedWriter Method

Richard MacCutchan22-Dec-12 23:30

Re: Java Netbeans Error Regarding Arraylist in BufferedWriter Method

22-Dec-12 23:30

Firstly you need to understand the product you are using: Netbeans does not produce these error messages, they come from the Java compiler; this is a Java program error. Secondly you need to look at your use of the package keyword, as I mentioned in my earlier message. And thirdly, go back to the responses that Torsten.H has given you about your use of messageList().

One of these days I'm going to think of a really clever signature.

TorstenH.22-Dec-12 1:19

TorstenH.

22-Dec-12 1:19

Double post -> Java Netbeans Error Regarding Arraylist in BufferedWriter Method[^]

regards Torsten
When I'm not working

java

quest4knowledge21-Dec-12 6:46

21-Dec-12 6:46

Anyone plzzz xplain me or provide me wid any good ebooks on d topic "Recursion of methods in Java".....help help!! Smile | :)

Siddhartha

Re: java

Richard MacCutchan21-Dec-12 22:50

21-Dec-12 22:50

Recursion is the same in all languages, Google will find lots of references.

One of these days I'm going to think of a really clever signature.

Re: java

April Fans22-Dec-12 21:15

April Fans

22-Dec-12 21:15

Hello there,

There are multiple resources available. In my own opinion, I felt that the following was written very well and helped me understand the concept even better: Thinking Recursively with Java by Eric S. Roberts
(http://www-cs-faculty.stanford.edu/~eroberts/books/ThinkingRecursively/

The text features the following:

A thorough and clear introduction to the difficult concept of recursion

Uses a broad range of examples to illustrate the principles used in recursion and how to apply them to programming

Features imaginative examples along with various exercises and their solutions.

Best of Luck!

Happy Reading!

With Kind Regards,

April

Comm100 - Leading Live Chat Software Provider

modified 27-May-14 8:38am.

Re: java

quest4knowledge13-Jan-13 0:33

problem in running derby database

13-Jan-13 0:33

THANKS A LOT!!

Member 858607221-Dec-12 2:38

Member 8586072

21-Dec-12 2:38

I've got this exception after running my project
Really don't know what to do!
SQLException: No suitable driver found for jdbc:derby://localhost:1527
I've add derbyclient.jar to Library.but I didn't get any different result.I also don't want to create a new database.
I wasn't able to attach it here but here are two links to download project files.
source:
http://bia2internet.com/dl/java/java.zip
database:
http://bia2internet.com/dl/java/db.zip

Re: problem in running derby database

TorstenH.22-Dec-12 1:29

TorstenH.

22-Dec-12 1:29

You might have to add the derbyclient.jar to the build, so it can be accessed at runtime.

to create a new database you need to tell derby so:

jdbc:derby://localhost:1527/dbname;create=true

Please also check out the Derby Documentation and Quick Start Guide:

http://db.apache.org/derby/quick_start.html[^]

Derby is well documented and works fine. Best choice for integrated databases.

Have fun.

regards Torsten
When I'm not working

executive java program

OmarSH20-Dec-12 22:41

20-Dec-12 22:41

Hello Everyone
iam learning programming in java i started in GUI programming i need to know how to make programs executable i use eclipse i tried to export it as a .jar but it didnt work
pls help Smile | :)

thanks.

Richard MacCutchan20-Dec-12 22:53

20-Dec-12 22:53

OmarSH wrote:
i tried to export it as a .jar but it didnt work

You need to provide more details than that. Remember, we cannot see your screen or the commands you may have used to create the .jar file. Please explain what you did to create the jar, what output you got, and what happened when you tried to run it.

One of these days I'm going to think of a really clever signature.

OmarSH21-Dec-12 3:06

21-Dec-12 3:06

i didnt use any commands ,i export it as a .jar file using eclipse IDE

Richard MacCutchan21-Dec-12 3:27

21-Dec-12 3:27

Well you still have not explained what happens. Please show us exactly what commands you use to run it, and what results you see?

One of these days I'm going to think of a really clever signature.

OmarSH21-Dec-12 3:43

21-Dec-12 3:43

hi i open eclipse IDE i select on the class(in project explorer) by right click in the mouse ,i pressed export as a jar(one time as a runnable jar file and other as jar file) then next select the export destination
the program made a jar file on desktop i click on it it is open like explorer )
by the way i am using linux mint
thanks

Richard MacCutchan21-Dec-12 4:06

21-Dec-12 4:06

You cannot run java programs by clicking them, you have to use the java command, e.g.

java -jar myjavaprogram.jar

One of these days I'm going to think of a really clever signature.

OmarSH21-Dec-12 8:28

21-Dec-12 8:28

Thank you it is really worked Smile | :)

but how to make it like a program (install ,desktop icon, etc)

Richard MacCutchan21-Dec-12 22:56

21-Dec-12 22:56

Java is not designed to operate that way by default. However, there are some converters that may help[^].

One of these days I'm going to think of a really clever signature.

Stephen Dycus21-Dec-12 1:42

Stephen Dycus

21-Dec-12 1:42

Does it run if you hit the green arrow at the top? If so, just right click your project and export it Export -> Java --> Runnable Jar

OmarSH21-Dec-12 3:05

21-Dec-12 3:05

it is run when i press the green button but when i export it ass jar it didnt run

programming

quest4knowledge18-Dec-12 23:15

18-Dec-12 23:15

hi friends....m a beginner in java language..plzz help me any1 by writing a code to generate dis pattern:
*
******
**********
************
**************
************
**********
*******
*

plzz help!! Sniff | :^)

Siddhartha

Re: programming

Richard MacCutchan19-Dec-12 0:00

19-Dec-12 0:00

This question continues to be posted by students on this course. Try thinking about the problem and breaking it down into logical steps:

Set some counters with start values
Write some number of asterisks (maybe by using a loop)
Increment the counter that specifies the number of asterisks
Check whether the maximum limit has been reached, and repeat if not
Start the second loop, same as above but decrementing until the minimum is reached

One of these days I'm going to think of a really clever signature.

Re: programming

quest4knowledge20-Dec-12 6:39