How could I call Java code dynamically?

Question

How could I write Java code that is executed like javascript code used together with the eval function?

What I would like to achieve would be something like this:

System.execute ("String str = \"test\"; System.out.println(str);");

which would print the word 'test'. (10x dehmann )

A code sample would help a lot.

It might just be me, but your question doesn't make a lot of sense. JavaScript is a Web Scripting language, where as java is run in the java framework. You can build java applets, but I don't think that's what you're referring to. — regex
– regex, Commented Feb 25, 2009 at 22:42
I'm guessing the reference to JavaScript was just an example of what he wants to achieve. — Michael Myers
– Michael Myers ♦, Commented Feb 25, 2009 at 22:43
I think he wants something like: System.execute("String str(\"test\"); System.out.println(str);"); which would print the word 'test'. — Frank
– Frank, Commented Feb 25, 2009 at 23:42

Bill K · Accepted Answer · 2009-02-25 22:45:16Z

4

Look into BeanShell or Groovy. Both will give you reasonable solutions--but those solutions rely on my interpretation of your problem, which may be flawed.

answered Feb 25, 2009 at 22:45

Bill K

62.9k19 gold badges113 silver badges158 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Ravi Wallau · Accepted Answer · 2009-02-26 04:54:37Z

1

I've used the JavaScript engine shipped with Java 6 and it works quite well. The performance of the engine is very very decent.

Check the page http://java.sun.com/javase/6/docs/technotes/guides/scripting/programmer_guide/index.html

answered Feb 26, 2009 at 4:54

Ravi Wallau

10.5k2 gold badges27 silver badges34 bronze badges

Comments

Brian Agnew · Accepted Answer · 2009-02-26 12:02:42Z

1

I believe the compiler API is present in the current Java SE 6. See the javadoc.

See this blog post for details and an example.

answered Feb 26, 2009 at 12:02

Brian Agnew

273k38 gold badges342 silver badges443 bronze badges

Comments

Tim Williscroft · Accepted Answer · 2009-02-26 05:11:12Z

0

For completeness sake, the Compiler API is coming in the next version of Java..

answered Feb 26, 2009 at 5:11

Tim Williscroft

3,76426 silver badges37 bronze badges

1 Comment

Peter Lawrey Over a year ago

The Compiler API is in Java 6. It works but its ugly to use. However you can use BeanShell and JCI if you don't have Java 6.

Collectives™ on Stack Overflow

How could I call Java code dynamically?

4 Answers 4

Comments

Comments

Comments

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

Comments

Comments

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related