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evaluating string expressions in Java

Yatharth Kumar

Joined: Dec 06, 2002
Posts: 14
I am looking at usage of javascript eval method from within a java application to evlauate javascript expressions. Its works with JSObject, but the problem is I cant figure out how to obtain an instance of JSObject from a Java Class which is not an applet.
I dont want to use anything that will increase the size of the app. by more than 10 KB - why should I include complete JS engine if I all I want to do is eval!
Any help would be greatly appreciated !
Peter den Haan
Ranch Hand

Joined: Apr 20, 2000
Posts: 3252
There is nothing of the kind in the Java platform itself. You could write an expression evaluator yourself, or hunt down one that fits the bill; there are plenty around, varying from simple and small ones that consist of a single java file to complete scripting languages such as JavaScript, BeanShell, Jython or JRuby; see Programming Languages for the Java VM for more details than you ever wanted to know.
- Peter
It is sorta covered in the JavaRanch Style Guide.
subject: evaluating string expressions in Java
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