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I am a student. I need to make a application. I have built the GUI. Now I need to know how to do it?
I have heard about sql server compact, but does it work together with j2me? If not, something to solve the problem?
It will be better if you can pass me a example. If you couldn't, not worry, I just to need to know a database program for mobile (with j2me).
Could it be possible without use a database program? For example, using a text file? Or any other storage mechanism.
Appreciate any help.
In j2me you can use RMS. But you can't handle with large data. Some Third party database's also available for j2me development. You can use that API's. Also refer this existing discussion on same in this forum. And look at database connection using j2me article.
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I am creating a game app where you need the ability to be able to create profiles for other players and store them on your phone. I have been looking around for help, but I can't seem to find any tutorial or help for this. Does anyone know which aspect of java I need to research and learn about? I have seen that it might be to do with App-specific files but I'm not sure if that is the right thing.
You can store user information in files (XML / JSON format). You can use the database too - Android supports SQLite (SQLlite database is stored as single file). Android creates files in private folder, other applications cannot access them.
More informations about files:
https://developer.android.com/training/data-storage
Example of usage of SQLite:
https://developer.android.com/training/data-storage/sqlite
Remember not to store user sensitive data in plaintext.
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I'm new to java and I'm recently working on a project which allows you to deposit, withdraw and create new accounts. I want to know if I can somehow save the changes after rerunning the code, for example, the change of users. I've tried several ways on the internet and they didn't seem to work.
There are a variety of ways to accomplish this. For a new programmer, I'd suggest learning how to read and write from files to start.
A simple database system is also an option, but probably more complicated than what you're looking for. This also can't be covered in one tutorial. If you're interested, you should probably do your own research and find something that works for you.
What you need is a database system.
In short, the database will store the data. Your program reads and displays that data. The user modifies it, and pass it to your program to "save" the data (which is replaced the old data with new ones in the database)
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I am building a small java application that shall run locally on a system. The data I intend to input is little stuff like my daily expenses, a couple of contacts I have, and a couple of notes of things I want to remember.
To save the data for this matter I think installing a database like MySQL or Oracle would be an overkill. In my past projects I always used those databases.
How would I have to manage the data of a small program? Are there any ready to use solutions in the java world? Maybe with the possibility to use it together with JPA?
You should look into Apache Derby:
http://db.apache.org/derby/
or HyperSQL:
http://hsqldb.org/
They're both lightweight database engines that you can fire up on application start-up, ideal for smaller projects. They also both have Hibernate dialects for JPA.
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So I'm starting an android project, very new to it and to java.
But I have a knowledge in programming, especially VB.
I'm planning to create and app for certain users to see the data from a database. Is it possible without an internet connection? If not, will be a difficult task?
Where is the database? Is it online? When you say "Data Connection" do you mean Edge/4G/LTE or WiFi or Bluetooth? Your device has to connect at least once to the database in order to copy over the required data, and it depends on the database, but you might as well just copy it locally all over to the device itself.
Here are few starting points:
Internet
WiFi
Bluetooth
Database (SQL)
I also recommend getting this book for beginners (try Google-ing it, you know...) . It was very helpful for me to use it. In about a week (if you are fast like that) you can have a pretty solid experience and understanding.
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I am new in embedded world. May be I am wrong. But I want a relevant solution.
I just want to embed java environment into a MCU for ease to develop application. The MCU vendor have provide the C library for lcd, sensor, spi, buttons, UART, DIO etc etc. Can I embed java into this ?? I mean, I want to use java on the MCU, uppon those device drivers.
Can I use or make something like this??
I have seen the simple Real-Time-Java it's very tiny.
Thank you.
Take a look at NanoVM and Bajos.