I need a method that can be attached to a button to help navigate previous and next scenes in javafx,swing or awt GUI programmin

Question

Id used this code
Hashmap<Integer,Scene>positions=new Hashmap<Integer,Scene>();
int value;

Public static void back(){

positions.put(1,scene);
positions.put(1,scene1);
positions.put(1,scene2);
positions.put(1,scene3);

Scene il=Window.getScene();
If(il.equals(scene1)
value=1;
else if(il.equals(scene2)
value=2;
else if(il.equals(scene3)
value=3
Window.setScene(positions.get(value);

Answer 1

Advanced java like servlet and applet are not supported here that's why no idea.