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• Protected members in a superclass inaccessible by indirect subclass in Java

  - by MSumulong

  Why is it that in Java, a superclass' protected members are inaccessible by an indirect subclass in a different package? I know that a direct subclass in a different package can access the superclass' protected members. I thought any subclass can access its inherited protected members.

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• Java: Finding objects in collections.

  - by Jake

  This problem occurs over and over. I have some complicated object, such as a Cat, which has many properties, such as age, favorite cat food, and so forth. A bunch of Cats are stored in a Java Collection, and I need to find all the Cats that are aged 3, or those whose favorite cat food is Whiskas. Surely, I can write a custom method that finds those Cats with a specific property, but this gets cumbersome with many properties; is there some generic way of doing this?

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• Implementing parallel coordinates for multi dimensional data in Java

  - by Algorist

  Hi, I am planning to implement parallel coordinates in java using JOGL library. Do you have any other suggestions? Thank you Bala

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• Java: thread-safe RandomAccessFile

  - by Folkert van Heusden

  Hi, After some serious googleing I found out that the RandomAccessFile-class is not thread-safe. Now I could use one semaphore to lock all reads and writes but I don't think that performs very well. In theory it should be possible to do multiple reads and one write at a time. How can I do this in Java? Is it possible at all? Thanks!

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• Java for a C programmer?

  - by Brian

  Hi, I have a lot of experience in C and Python, but I'd like to pick up some Java. I was curious if there was a "quick and dirty" guide tailored for people with previous CS background. I'd prefer free online resources but appreciate any suggestion. Thanks, Brian

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• taking integer input in java

  - by ruchir patwa

  I am actually new to java programming and am finding it difficult to take integer input and storing it in variables...i would like it if someone could tell me how to do it or provide with an example like adding two numbers given by the user..

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• .NET Attributes versus Java Annotations: Which Came First?

  - by Tom Tresansky

  I'm a .NET developer learning Java EE. These two concepts seem to serve the same exact purposes in either system. So which framework gets credit for inventing them?

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• Finding Last Fired time using a Cron Expression in Java

  - by a-sak

  Is there a way in Java to find the "Last Fired Time" from a Cron Expression. E.g. If now = 25-Apr-2010 10pm, cron expression "0 15 10 ? * *" (quartz) should return me 25-Apr-2010 10:15am I do not care if we use standard cron expressions (like Unix and Quartz) or less popular ones if they can fetch me the correct "Last Fired Time"

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• Java - store sensitive data

  - by Mike

  Hello. I develop application with Java. I need to store some initial configuration data in some kind of file. I want my app to be able to read this data, but I don't want user to do so. Example : application loads IP from encrypted file. User sees like "dsda@#21da@" so he won't bother doing anything :) How should I do such a thing? Thanx!

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• Examples of good Java desktop applications

  - by Abdullah Jibaly

  More of a wiki list/collection, I'm looking for a list of good Java desktop apps. I've added a couple below to get started. Please list the framework/widget toolkit being used if it's know as well.

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• What Java library should I use for cryptography?

  - by Spines

  Basically I want to be able to encrypt and decrypt with AES 256. What is the industry standard library for encryption in Java? Something that has been around a long time and is tried and true.

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• Java GUI libraries

  - by Dan

  I have been working with the Swing library for a long time, I'm working on a new project for school and due to the nature of the program it can't look like a generic/boring swing gui. So my question is does anyone know of an interesting java gui library that is not swing or awt?

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• java array manipulation

  - by sachin

  Hi, I'm a beginner in java. I want the logic of the small program. I have two arrays array = {a1,a2,a3,a4,a5,,,,,,,,,an} and array2 = {b1,b2,b3,b4,,,,,,,,,,,bn} I want string as: a1b1,a2a3b2b3,a4a5a6b4b5b6,..........an Please tell me what will be the logic.

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• JAVA gzip.read AND PHP

  - by Mantas

  I have line in JAVA and in while i get number: i = gzipinputstream1.read(abyte0, j, 4096); From while number: 959 1552 1577 1617 1680 when i want use in php: $i = fread($handle, 959): while return: 959, 959, 959, 5 How make that in PHP result will be the some. thanks

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• question about complex values in java

  - by davit-datuashvili

  We know that the general form of complex numbers is like this: z=a+i*b, where i is sqrt(-1). I have a question about how to express this in Java ?

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• How to make java-application standalone?

  - by elr

  I have to burn a java-application on a cd. This application have to run on every windows pc wihtout any installation (also jre shouldn't be installed) before.

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• hardware detail using Java

  - by Anup Prakash

  I want to make a java application software which give the current status/information of the running computer. So, for this, is there any inbuilt/extrnal library present or not? Can anyone give a simple code which will just. "What is the current status of laptop battery?" or "Is AC adapter is pluged in or not?" Please help me.

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• Suggestions for library to hash passwords in JAVA

  - by DutrowLLC

  What JAVA library should I be using to Hash passwords for storage in a database? I was hoping to just take the plain text password, add a random salt, then store the salt and the hashed password in the database. Then when a user wanted to log in, I could just take their submitted password, add the random salt from their account information, hash it and see if it equates to the stored hash password with their account information.

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• Getting the size (in bytes) of the ResultSet using java code

  - by Bhaskara Krishna Mohan Potam

  How to get the size(in bytes) of the given ResultSet within the java code. Is there any direct way to find out?

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• tabs problem in java swings

  - by charan

  hi all... i had created 8 tabs in tabbed panel using java swings. the problem is when i enter data in any tab and click the save button. after clicking it leaves the present tab/panel and going to first tab. i have to retain on the same tab after clicking the save button.. so please help me on this

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• Return number of rows affected by SQL UPDATE statement in Java

  - by Krt_Malta

  I'm using a MySQL database and accessing it through Java. PreparedStatement prep1 = this.connection.prepareStatement("UPDATE user_table SET Level = 'Super' WHERE Username = ?"); prep1.setString(1, username); The update statement above works fine however I'd like to get the number of rows affected with this statement. Is this possible please?

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• How to generate a checksum for an java object

  - by Alex

  hi there, I'm looking for an solution to generate a checksum for any type of java object, which remains the same for every exection of an application which produces the same object. I tried it with object.hashcode(), but as I read in the api ....This integer need not remain consistent from one execution of an application to another execution of the same application. thank you, best regard alex

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• best way to communicate between .net and java

  - by manu1001

  I have a .net application which needs to expose a service consumed by a java client. The service can't be public. There should be some authentication mechanism for the client. What is the best way to do this? I'm new to web services and am confused by all the soap, wsdl etc. and have also heard a lot that it'll be a pain to get the two to communicate. Your thoughts?

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• Unit testing Google wave robots in Java

  - by Paul

  Any tips or best practices for unit testing Google Wave robots written in Java? I'm expecting to deploy on AppEngine, if that helps. I'm a fan of TDD but new to both Wave Robots and AppEngine, so I'm hoping to use TDD to help me explore the design space.

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• Fading Indicator message in Java

  - by jtzero

  How to/What is a good library, to create a fading indicator message in Java like that of Outlook when you get a message, or Ubuntu/Gnome when you've connected to a network?

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