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java_platform - IEG 4180 Network Software Design and...

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IEG 4180 IEG 4180 Network Software Design and Programming Network Software Design and Programming The Java Platform The Java Platform A Brief Overview A Brief Overview
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IEG4180: Network Software Design and Programming - The Java Platform 2 Copyright Jack Y. B. Lee All Rights Reserved Contents 1. Introduction 2. Architecture 3. Platform Highlights 4. Development Platform 5. Language Basics 6. Object Allocation 7. Parameter Passing 8. Graphical User Interface 9. Decompiler 10. Obfuscator 11. Non-Java Languages
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IEG4180: Network Software Design and Programming - The Java Platform 3 Copyright Jack Y. B. Lee All Rights Reserved 1. Introduction In The Beginning Start out in 1991 by a team of Sun Microsystems Programmers, originally called the “Oak” language. The original goal is to develop a system for consumer electronic devices such as interactive TV setup-box and game console. “the goal was ... to build a system that would let us do a large, distributed, heterogeneous network of consumer electronic devices all talking to each other.” - James Gosling. Retargeted at the Internet and business applications in 1994.
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IEG4180: Network Software Design and Programming - The Java Platform 4 Copyright Jack Y. B. Lee All Rights Reserved 1. Introduction Design Goals Platform independence Hardware diversity in consumer electronic devices Java byte-code and the byte-code interpreter Reliability and Security Imagine a refrigerator that needs to be “rebooted” from time to time to keep it running … or worst, gets hacked … Make it hard to write buggy code and contain the damages if a fault occurs. Ease of Use (by the programmer) To be widely adopted in many consumer electronics sectors the tools will have to be real easy to learn and use.
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IEG4180: Network Software Design and Programming - The Java Platform 5 Copyright Jack Y. B. Lee All Rights Reserved 2. Architecture Traditional Programming Language Model Compiler Object Codes C/C++ Source Files Libraries (static & dynamic) Linker Executable Program CPU/OS-Specific OS Services API
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IEG4180: Network Software Design and Programming - The Java Platform 6 Copyright Jack Y. B. Lee All Rights Reserved 2. Architecture Multi-Platform Software Development Through the use of a platform emulator : Application (CPU ‘X’, OS ‘U’) OS Services Emulation (‘U’-to-‘V’) Emulator (CPU ‘X’) Operating System ‘V’ Native Hardware (CPU ‘Y’)
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IEG4180: Network Software Design and Programming - The Java Platform 7 Copyright Jack Y. B. Lee All Rights Reserved 2. Architecture Multi-Platform Software Development Through the use of an application framework : C/C++ Source Files Application Framework Framework API OS-Independent Object Codes Libraries (static & dynamic) Linker Executable Program CPU/OS-Specific OS Services API Compiler OS API
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IEG4180: Network Software Design and Programming - The Java Platform 8 Copyright Jack Y. B. Lee All Rights Reserved 2. Architecture Multi-Platform Software Development
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