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Updating Java Objects From JavaFX Script

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Introduction Edit

The following code example will show you how to update a Java object from a JavaFX script.


DataObject.java:

package fxexamples;

public class DataObject {
private String name;
private String address;
private String phone;
private boolean isDirty;
/*Getters and Setters omitted for brevity*/

        public void PrintContents() {
		System.out.println("Name: " + name);
		System.out.println("Address: " + address);
		System.out.println("Phone: " + phone);
	}
}

FXtoJava.fx:

package fxexamples;
import javafx.ui.*;
import java.lang.System;
import fxexamples.DataObject;

JAVAOBJ:DataObject;

class DataClass {
 attribute name:String;
 attribute address:String;
 attribute phone:String;
}

var data:DataClass = new DataClass();

operation UpdateJavaData(dc:DataClass) {
 JAVAOBJ:DataObject.setName(dc.name);
 JAVAOBJ:DataObject.setAddress(dc.address);
 JAVAOBJ:DataObject.setPhone(dc.phone);
 JAVAOBJ:DataObject.PrintContents();
 System.out.println("Updated java object");
}

Frame {
 title: "FXTimer"
 width: 250
 height: 200
 content: [ Box {
 orientation: VERTICAL
 content: [ FlowPanel {
 content: [ Label {text: "Name"}, TextField { value: bind data.name columns: 10 } ]
 }, FlowPanel {
 content: [ Label {text: "Address"}, TextField { value: bind data.address columns: 10 } ]
 }, FlowPanel {
 content: [ Label {text: "Phone"}, TextField { value: bind data.phone columns: 10 } ]
 }, Button {
 text: "Update Java Data" action: operation() {
                                   UpdateJavaData(data);
                                  }
 }]
 }]
 visible: true
}

RunFX.java:

package fxexamples;

import javax.script.Bindings;
import javax.script.ScriptContext;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.SimpleScriptContext;
import javax.swing.SwingUtilities;

public class RunFX {
 public static void main(String[] args) {
 final DataObject myObj = new DataObject();
 Runnable fxScript = new Runnable() {
 public void run() {
 ClassLoader loader = Thread.currentThread().getContextClassLoader();
 ScriptEngineManager manager = new ScriptEngineManager(loader);
 ScriptEngine engine = manager.getEngineByExtension("fx");
 Bindings bindings = engine.createBindings();
 //Bind the Java Object to the one we'll use in the JavaFX Script
 bindings.put("JAVAOBJ:fxexamples.DataObject", myObj);
 ScriptContext context = new SimpleScriptContext();
 context.setBindings(bindings, ScriptContext.GLOBAL_SCOPE);
 context.setBindings(bindings, ScriptContext.ENGINE_SCOPE);
 engine.setContext(context);
 
 String script = "import fxexamples.FXtoJava;";
 try {
      engine.eval(script);
 } catch(Exception ex) {
      ex.printStackTrace();
 }
 }
 };
 SwingUtilities.invokeLater( fxScript );
 }
}

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