javajavascriptappletliveconnect

Send Java object from JavaScript to Applet

How I can send Java object from JavaScript to Java? LiveConnect allow us to get Java objects from calling applet method. i.e. we can have following method in applet: 

public MyClass getMyClass() { return new MyClass(); }`

where MyClass is:

public class MyClass implements Serializable {
   private String a;
   private String b; //getters, setters
}

and in JS access this objects using:

applet.getMyClass().someMethod();

But how I can pass object from JavaScript (json object I think) to java method (not as json string)? i.e. I want to have in applet method like this:

public void myMethod(MyClass var)

and from JavaScript call this method passing parameter of type MyClass. How to build MyClass object in JS? I hope LiveConnect do conversion from JSON to Java object automatically..

Solution

  • I believe this should give you a good idea about how to go about this.

    import netscape.javascript.*;

public class MyClass implements Serializable {
public String a;
public String b;

    public JavaDog(JSObject o) {
        this.a= (String)o.getMember("a");
        this.b = (String)o.getMember("b");
    }
}

    Then you use new Packages.MyClass(yourJavaScriptObject) to create the object you want to pass to Java.

    More information here:

    https://developer.mozilla.org/en-US/docs/JavaScript/Guide/LiveConnect_Overview