Working with Compilable Scripts : Script Engines « JDK 6 « Java

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Java » JDK 6 » Script Engines

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Working with Compilable Scripts


    



import javax.script.Compilable;

import javax.script.CompiledScript;

import javax.script.ScriptEngine;

import javax.script.ScriptEngineManager;

import javax.script.ScriptException;



public class JDK6TabSample {

  public static void main(String args[]) {

    ScriptEngineManager manager = new ScriptEngineManager();

    ScriptEngine engine = manager.getEngineByName("javascript");

    engine.put("counter", 0);

    if (engine instanceof Compilable) {

      Compilable compEngine = (Compilable) engine;

      try {

        CompiledScript script = compEngine.compile("function count(){counter=counter+1;return counter;}; count();");

        System.out.println(script.eval());

        System.out.println(script.eval());

        System.out.println(script.eval());

      } catch (ScriptException e) {

        System.err.println(e);

      }

    } else {

      System.err.println("Engine can't compile code");

    }

  }

}

/*1.0

2.0

3.0*/

Related examples in the same category

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2.	Running Scripts with Java Script Engine
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4.	Variables bound through ScriptEngine
5.	Catch ScriptException
6.	Any script have to be compiled into intermediate code.
7.	With Compilable interface you store the intermediate code of an entire script
8.	List the script engines
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10.	Pass parameter to JavaScript through Java code
11.	Get the value in JavaScript from Java Code by reference the variable name
12.	Call a JavaScript function three times
13.	Save the compiled JavaScript to CompiledScript object
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16.	Get Script engine by extension name
17.	Get a ScriptEngine by MIME type
18.	Retrieving Script Engines by Name
19.	Retrieving the Metadata of Script Engines
20.	Retrieving the Supported File Extensions of a Scripting Engine
21.	Retrieving the Supported Mime Types of a Scripting Engine
22.	Retrieving the Registered Name of a Scripting Engine
23.	Executing Scripts from Java Programs
24.	Read and execute a script source file
25.	Using Java Objects in JavaScript
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30.	Use Java scripting engine (JDK 1.6)
31.	Use an external file containing the javascript code
32.	Java Language Binding with JavaScript
33.	Compresses a String containing JavaScript by removing comments and whitespace.
34.	Escape and unescape javascript code
35.	Utility to take xml string and convert it to a javascript based tree within html.

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