Bluetooth technology standards for wireless java APIs, defined by the JSR 82 specification, supports rapid development of convenient, safe and uses a wide range of Bluetooth applications. Wireless device manufacturers have to respond to the JABWT norms, they announced that mobile phones and other products will support JABWT applications. This paper, we first introduced in the java development on mobile devices, the basic principles and then describe how to write java application of Bluetooth communication. Java Bluetooth API relies java Generic Connection Framework, which has been the one to become a java application limitations of the Bluetooth API. However, it is proposed that GCF added to the J2SE. Java Bluetooth API makes it possible to access more systems. Java Bluetooth API defines two packages: one is the core Java Bluetooth API javax.bluetooth, the other is used for object exchange protocol javax.obex. According to JSR 82 specification, all potential Bluetooth system must support the Bluetooth control center, the control center is a control panel, its role is similar to let the user or OEM to stack some of the configuration parameters should be defined in specific applications, in particular, it applies to the stack initialization.
11) initdefault: to specify a default run level, only when the init is called when the scan started this one, if rstate field specifies more than one run level, the largest number is the default run level, and if rstate field is empty, init that the field is 0123456, then enter the level 6, thus caught in a cycle, if the inittab file, the record does not contain initdefault entry in the system startup it requests the user specifies an initial run level. Process field, the waiting process can be any process, the executable script or program. In addition, at any time, you can add a new file record inittab entry-level Q / q does not change the current run level and re-check the inittab file, you can command init Q or init q to re-read the init process and deal immediately file inittab.