@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (getClass() != obj.getClass()) return false;
ClusteredEntityWithObjectValue other = (ClusteredEntityWithObjectValue) obj;
if (id == null) {
if (other.id != null) return false;
} else if (!id.equals(other.id)) return false;
if (value == null) {
if (other.value != null) return false;
} else if (!value.equals(other.value)) return false;
return true;
}
public static void main(String[] args) {
Holder<Apple> Apple = new Holder<Apple>(new Apple());
Apple d = Apple.get();
Apple.set(d);
Holder<? extends Fruit> fruit = Apple;
Fruit p = fruit.get();
d = (Apple) fruit.get();
try {
Orange c = (Orange) fruit.get();
} catch (Exception e) {
System.out.println(e);
}
System.out.println(fruit.equals(d));
}