WebView – JavaFX 8 webengine: how to from Java to console Log() from Java to system out？

I use JavaFX and JavaScript engine to develop applications in JavaFX web engine I want to get feedback from JavaScript for debugging What happens to console output in web engine? Is there any way to access it or redirect to system. Net in Java out？

Solution

The following code will console Log() redirects to javabridge log()：

import netscape.javascript.JSObject;

public class JavaBridge
{
    public void log(String text)
    {
        System.out.println(text);
    }
}

[...]

webEngine.getLoadWorker().stateproperty().addListener((observable,oldValue,newValue) ->
{
    JSObject window = (JSObject) webEngine.executeScript("window");
    JavaBridge bridge = new JavaBridge();
    window.setMember("java",bridge);
    webEngine.executeScript("console.log = function(message)\n" +
        "{\n" +
        "    java.log(message);\n" +
        "};");
});