Group items tagged

engine.eval(scriptReader, vars);

sun.org.mozilla.javascript.internal.NativeObject

all data exchange between the Java code and the executed script should be done through primitive variables, strings, and Java objects (for example, beans) whose properties and methods can be accessed very easily in the JavaScript code. Simply said, don't try to access native JavaScript objects in your Java code. Use Java objects in the JavaScript code instead.

Note that javax.script.Invocable is an optional interface, which some script engines may not implement. The JavaScript engine that comes with JDK 6 does support this interface.

you can significantly reduce the execution time by compiling the scripts, using the methods provided by another optional interface named javax.script.Compilable, which is supported by the JavaScript engine of JDK 6.

Some argue that JavaScript is not truly object oriented because it does not provide information hiding. That is, objects cannot have private variables and private methods: All members are public. But it turns out that JavaScript objects can have private variables and private methods. (Click here now to find out how.) Of course, few understand this because JavaScript is the world's most misunderstood programming language. Some argue that JavaScript is not truly object oriented because it does not provide inheritance. But it turns out that JavaScript supports not only classical inheritance, but other code reuse patterns as well.

will show up as an object property in any

loop in the page.

var a = "I am a string!";   2 alert(typeof a); // Will output "string"   3 var b = new String("I am also a string!");   4 alert(typeof b); // Will output "object"