Composed key object sample

ComposedKeyObjectSample.java

Map<MyObjectKey, MyObject> map = new HashMap<>();
//Or loaded from database:
MyObject obj1 = new MyObject(1311, 313, "Madrid");
MyObject obj2 = new MyObject(1332, 313, "Barcelona");
MyObject obj3 = new MyObject(1311, 928, "Zaragoza");
....
....
map.put(obj1.getKey(), obj1);
map.put(obj2.getKey(), obj2);
map.put(obj3.getKey(), obj3);