BE THE CODER > Java Scripting > BeanShell Examples

BeanShell is a small, free, embeddable Java source interpreter with object scripting language features, written in Java. BeanShell is a natural scripting language for Java. This requires the library bsh-2.0b4.jar to be in classpath. The following example shows retrieving beanshell scripting variables from the interpreter in Java.

File Name :

/BEAN_SHELL001/config/circle_area.bsh


print("Calculating Area");

area = Math.PI * Math.pow(radius, 2);

print("Area Calculation completed");

File Name :	com/bethecoder/tutorials/bean_shell/AccessFromAppTest.java
Author :	Sudhakar KV
Email :	[email protected]


package com.bethecoder.tutorials.bean_shell;



import java.io.InputStreamReader;



import bsh.EvalError;

import bsh.Interpreter;



public class AccessFromAppTest {



  /**

   * @param args

   * @throws EvalError 

   */

  public static void main(String[] args) throws EvalError {

    Interpreter interpreter = new Interpreter();  

    interpreter.set("radius", 4);            



    InputStreamReader reader = new InputStreamReader(

        ScriptedMethodsTest.class.getClassLoader()

        .getResourceAsStream("circle_area.bsh"));

    interpreter.eval(reader);  

    

    Double area = (Double) interpreter.get("area");

    System.out.println("Area of Circle : " + area);

  }



}

Get data from BeanShell