This little “how to” assumes that you are among the millions who use a Windows-based PC to download the desired Java programs and then transfer them to your mobile phone (unless your phone has internal memory, Java applications must be copied to a TF (or other mobile phone memory cards), which is then inserted into your phone). Also, this article is meant to be a basic overview of all Java mobile phones, but it will most likely be very useful for people who own an unbranded mobile phone made in China.
Step 1.
Be sure to find out if your phone can run Java programs. For famous brands, including phones like the iPhone, you should see a Java icon or just do a quick Google or Yahoo search. For unbranded phones, be sure to ask your carrier if your phone has the ability to run Java.
Step 2.
Connect your phone to your computer in a USB port. Then a newly created drive will appear in “My Computer”, just like connecting a USB flash disk or MP3 player. If your mobile phone has a memory card and internal memory (such as a microSD card), you will see two removable drives.
Set up a new folder inside a removable drive with some untapped memory and call it “java” (I suggest this as a way to make sure everything is clean and tidy so you can put your downloaded stuff in a later step, but in the end it shouldn’t hurt what you call the file).
Step 3.
Find any Java application that you think is cool. I recommend this site.
http://getjar.com/
They have a good selection of apps, and you can narrow your search by operating system or manufacturer for quick options. I prefer Java Generic as it can often work on almost any mobile device. After you find the Java application you like, download it; however, what you want to download from the site is a JAR file
Step 4.
Once you have finished downloading the app, you should have a zipped file. Don’t unzip it. All it takes is clicking and dragging the zipped application from your PC to your mobile phone using a USB cable (remember step 2? It’s handy to have a pre-dubbed java file, isn’t it?)
Step 5.
Disconnect your phone from the PC, navigate to your phone’s file manager and find your folder for Java applications. Examine it and you will see your Java application. Click on it and allow the installation. After that, the phone will start installing automatically and will inform you when and if the installation was successful.
Step 6.
Browse the program on your phone that runs Java applications, locate your loaded application, and use the application.
That’s basically it. Please note that not all apps will work with every phone model, or they may not work properly. I’d recommend free Java applications, or if they’re not free, look into a reduced trial version if possible. If they don’t work, then you really haven’t lost anything. Also keep in mind that Java applications do much more than just play fun games. Some of the best programs add everything from better and more sophisticated movie and music players to office tools.