Code:


import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.TextArea;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

/**
 * @author alexandr_kirov
 */
public class JavaFX_TextArea_ScrollTopLeft extends Application {


    public static void main(String[] args) {
        launch();
    }

    @Override
    public void start(Stage stage) throws Exception {
        final TextArea ta = new TextArea();
        for (int i = 0; i < 1000; i++) {
            ta.setText(ta.getText() + " some text");
            if (i % 10 == 0)
                ta.setText(ta.getText() + "\n");
        }

        VBox vb = new VBox(5);
        vb.getChildren().addAll(ta);
        Scene scene = new Scene(vb, 300, 300);
        stage.setScene(scene);
        stage.show();
    }
}

It makes, so that there must be a new line after 10 strings. But I see that, what is on attached screenshot.