本論文就針對提升 Java 的執行效率的問題，實作一個 Java 硬體的加速器，用以提升 Java 執行效能。實作於開放原始碼的 JamVM 上，在保持 JVM 原有架構的情況下，將 Java Bytecode 分成軟體實作與硬體實作，在需要執行 Java程式時，將硬體實作的Java Bytecode載入到Java硬體加速器，直接進行Java位元碼的直譯，執行結束後，傳回操作堆疊與區域變數的值，藉由硬體來提升整體 Java 虛擬機器的執行速度。
硬體加速器實作出來的效能在執行效能評估程式時，比未使用硬體加速器時的效能視評估程式的特性而定。就幾乎無重覆執行性的程式而言，由於載入程式片段進入硬體的加速器的額外時間，效能會稍差。但對重覆執行性高的程式而言，可相對提升3.5～7倍的效能。

In this thesis, we are to speedup the performance of Java programs. We design and implement a Java hardware accelerator to cooperate with the JamVM, an implementation of Java Virtual Machine (JVM). Keeping JVM original structure, instructions are classified into two groups: software interpretation and execution by hardware directly. When executing a Java program, a block of (micro-code) hardware instructions for those to be executed Bytecode instructiona are dynamically loaded into the hardware accelerator by JVM. Then control transfers to the hardware accelerator. After the block completes execution, control transfer backs to JVM.
The speedup of the hardware accelerator depends on application programs. For the benchmark program that does not have repeatative execution of a single block, the Java accelerator does not accerlerate, instead a little bit slower because of the loading (microcode) overhead. However, for benchmark programs with highly repeated exection rate of a single block, its speed up is between 3.5 to 7.

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