You can download Java applications to the devices either through the phone or using a computer.
Using the device, you need to download desired application from the device web browser and then you will be prompted to install the application once download completes. 3rd party Java application may or may not work depending on it's compatibility with the device.
Using PC, the customer can download the application and save it on the computer. With the use of Nokia Suite, they will be able to install the application on the device by connecting it to the computer through data cables.
If you come across an application you would like to install on your device, double-click the application's installation file, or drag the file onto your device's image in the device area. Then click OK in the dialogue that opens. This will start the application installation.
Note: Make sure the installation package is compatibele with your phone model and only install from sources that offer adequate protection against harmful software.