code for Read and execute a script source file

import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.Reader;

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;

public class ScriptExecutionReaderDemo {
public static void main(String[] args) throws Exception {
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine jsEengine = manager.getEngineByExtension("js");
Reader reader = new InputStreamReader(new FileInputStream("yourJavaScript.js"));
jsEengine.eval(reader);
}
}
//File yourJavaScript.js
/*
importPackage(java.lang);
function getName(name)
{
if ((name != "")&&(name !=null))
{
System.out.println("Hello "+name+"!")
}
else
{
System.out.println("Hello!")
}
}
getName("TOM");

*/