ScriptEngineManagers find and create script engines indirectly.

ScriptEngineManager 间接查找和创建脚本引擎。

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You just have to place the JAR files of the script engines in your CLASSPATH.

只需将脚本引擎的JAR文件放入CLASSPATH即可。

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Many script engines maintain state of global variables and functions between calls to eval().

许多脚本引擎在 eval() 调用之间维持全局变量和函数的状态。

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