Is it ok not to call constructor of super class?

LinePane.java

package je3.thread;

import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Line;

/**
 * Created by IDEA on 03/02/15.
 */
public class LinePane extends Pane {
    public LinePane() {
        Line line1 = new Line(10, 10, 400, 400);
        line1.endXProperty().bind(widthProperty().subtract(20));
        line1.endYProperty().bind(heightProperty().subtract(20));
        line1.setStrokeWidth(5);
        line1.setStroke(Color.GREEN);
        getChildren().add(line1);
        Line line2 = new Line(20, 20, 300, 300);
        line2.startXProperty().bind(widthProperty().subtract(10));
        line2.startYProperty().bind(heightProperty().subtract(10));
        line2.setStrokeWidth(5);
        line2.setStroke(Color.BLUE);
        getChildren().add(line2);
    }
}