圖形化使用者介面是各種機器裝置和使用者之間的溝通橋樑。在實驗室前年學長楊程凱的研究中提出一個基於標準Java的圖形函式庫，我們重新將它命名為羽量級Java繪圖函式庫(Feather-weight Java Graphic Library, FJGL)。FJGL採用階層式架構，將與底層繪圖函式相依的部份儘量縮減至最小，往後要讓各嵌入式裝置的Java VM具備繪圖能力，只需要對該最小集合做移植即可。然而，該研究雖然得到了移植性卻犧牲了效能，根據其研究結果可以得知，該架構與繪圖架構慢了30~800倍。
本研究繼承自之前的研究。針對效能不佳的議題，將FJGL移植到Java硬體執行環境，也就是使用Java 處理器作為解決方案，在實驗中使用JOP (Java Optimized Processor) 做為效能量測平台，實驗結果顯示，在100MHz的工作頻率下，JOP的執行效能平均比原來的FJGL在3GHz工作頻率的PC上快5倍；而在203MHz工作頻率的ARM926EJ與JOP比較，後者僅比前者慢大約7.8倍；另外，本論文架構仍保有前人架構易移植之特性，使得FJGL可以輕易地整合至其它Java 處理器上。

The Graphic User Interface (GUI) is the bridge between users and programs. A Java-based Graphic Library was proposed in 2006. This paper uses a Java processor to accelerate the performance of the library, which is renamed as “Feather-weight Java Graphic Library” (FJGL). The FJGL focuses on cutting down the dependency between AWT (Abstract Window Toolkit) and the native graphic library as more as possible. According to FJGL, the effort of porting can be minimized by the least part of dependency, if Java VM needs GUI. Unfortunately, the FJGL provides more portability but it delivers poor performance. According to the results of the prior research, it is slower than the original AWT architecture about 30 to 800 times.
In this research, the FJGL is modified to adapt to the hardware execution environment (Java Processor). The JOP (Java Optimized Processor) is used in this research. The performance measures show that JOP (100MHz) gains 5 times speedup in average than the software FJGL (3GHz processor on PC). In addition, as compared with the AWT which uses native graphic library running on ARM926EJ, FJGL on OP slows down around 7.8 times. The architecture of this thesis still has the portability base on the FJGL. It is easy to integrate the FJGL with other Java processors.

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