added observer example

2024-11-11 11:16:34 +01:00
parent 6eee9df1fe
commit ca9d0ec062
5 changed files with 76 additions and 0 deletions
--- a/src/learn/simple_observer/Subject.java
+++ b/src/learn/simple_observer/Subject.java
@ -0,0 +1,7 @@
+package learn.simple_observer;
+
+public interface Subject {
+    void registerObserver(Observer o);
+    void removeObserver(Observer o);
+    void notifyObservers();
+}