System properties

Different mobile devices support different sets of Java APIs and other features. System properties allow you to determine which features are supported on a device. For example, you can use system properties to retrieve information about supported API versions, localized directory names, and whether a certain feature is available on the device. To retrieve system properties, use the java.lang.System.getProperty method. For instructions on how to use this method, see article How to read system properties in Java ME in the Nokia Developer Wiki.

For more information about the supported system properties, see the following sections:

• Generic system properties for common system properties supported on Nokia devices and devices based on the Symbian platform (defined in CLDC, MIDP, and MSA/JTWI)

• Nokia-specific system properties

• System properties for keypad settings

• System properties for specific APIs:

  • (JSR-75) FileConnection API

  • (JSR-82) Bluetooth API

    Note: For the Bluetooth API, use the javax.bluetooth.LocalDevice.getProperty method to retrieve system properties.

  • (JSR-135) Mobile Media API

  • (JSR-172) Web Services API

  • (JSR-177) Security and Trust Services API:

    • For Series 40 devices

    • For Symbian devices

  • (JSR-179) Location API

  • (JSR-184) Mobile 3D Graphics API

  • (JSR-205) Wireless Messaging API

  • (JSR-226) Scalable 2D Vector Graphics API

  • (JSR-234) Advanced Multimedia Supplements API

  • Nokia UI API

For an example on using system properties, see the system properties example MIDlet.