• băng thông mạng sẽ được cải thiện, mặc dù không đáng kể • kết nối mạng sẽ luôn luôn có sẵn, giảm độ trễ • chi phí cho lưu trữ liên tục sẽ tiếp tục sụt giảm và truy cập tốc độ sẽ tăng đáng kể như các công nghệ bộ nhớ mới, chẳng hạn như RAM Ferroelectric, từ RAM và bộ nhớ Ovonic , thay thế NOR và NAND flash | 422 THE MARKET THE OPPORTUNITIES AND SYMBIAN S PLANS network bandwidth will improve though not so dramatically network connections will always be available reducing latency costs for persistent storage will continue to tumble and access speeds will increase dramatically as new memory technologies such as Ferroelectric RAM Magnetic RAM and Ovonic memory replace NOR and NAND flash the resolution of screen displays will continue to improve through a decrease in dot pitch as screen sizes will be limited by overall mobile phone ergonomics. There will also be market changes smart houses will become a reality climate control entertainment and security systems will be controlled by a variety of devices including mobile phones digital consumer goods will converge. Today video cameras can take still images and digital cameras can record video and quite often both include MP3 players. These capabilities are moving into mobile phones the current phones only support VGA however the next generation of mobile phones will have megapixel resolution cameras indeed a number of Japanese cameras already do . Many of today s mobile phones come with FM radios and in the future we are likely to see the inclusion of Digital Audio Broadcast radios. In Korea people can now use their mobile phones for credit card purchases. The consequence will be an explosion in the amount of data users store on their mobile phone audio video images email and messaging. This will amount to gigabytes of storage. So we leave you with a simple challenge to use your development skills and the knowledge and insight that we hope you have gained from this book to create the next killer Java service or application on Symbian OS. Appendix 1 CLDC Core Libraries System Classes interface Instances of Class represent classes and interfaces in a running application. The Object class is the root of .
