Seven technologies needed to be mastered to learn about j2-based Programming

Seven technologies needed to be mastered to learn about j2-based Programming
Java is an application of Java in the field of Smart Home Appliances. It mainly includes the following technologies:
1. Advanced User Interface
Advanced user interfaces refer to the use of forms, TextBox, List, and Alert used in j2's programming, and the use of some of these controls, of course, also includes the corresponding event processing. Applications are generally used in login forms, related forms, and prompts.
2. Low-level user interface
Low-level user interfaces refer to the use of Canvas and Graphics, event processing, application and game programming, and the drawing of special interfaces.
3. Record Storage System
The record storage system is a technology supported by mobile phones for permanent data storage. Because there is no data file concept in the mobile phone, the data to be stored can only be saved as a record.
4. Sound Processing System
MIDP1.0 does not support sound processing, but many mobile phone manufacturers, such as Nokia and Siemens, support playing sound. This technology uses many APIs related to mobile phone manufacturers. However, MIDP2.0 provides general support.
5. Network Programming
Network Programming refers to connecting the network through the GPRS or CDMA network in the form of HTTP protocol or SOCKET. Currently, most mobile phones Support HTTP network programming, and few support SOCKET. Therefore, network programming uses HTTP protocol for the time being.
6. Multithreading
Multithreading is one of the core technologies in the J2EE application, because network programming and low-level user interface programming are designed to respond quickly and need to be processed into multiple threads. Therefore, you must be familiar with it.
7. Short Message Programming
Many mobile phones provide APIs for sending short messages, such as NOKIA, SIEMENS, and SAMSUNG. Therefore, sending short messages in j2s is also a common technology.
8. Others
Of course, some other technologies are also provided based on the vendor's differences, such as the support for files in the Siemens API and the support for reading the system address book by the Nokia API.