DESIGNER PATTERN FACTORY METHOD EM JAVA COM EXEMPLOS

[@wmatheushenriq]

Mt obrigado, meu amigo. Muito simples

[@programacaojajava]

Show de boa! Adaptei a factory removendo os ifs:
public class PolygonFactory {
private static final Map polygons = Map.ofEntries(
entry(3, new Triangle()),
entry(4, new Square()),
entry(5, new Pentagon())
);
public static Polygon createPolygon(int numberOfSides) {
if (!polygons.containsKey(numberOfSides)) {
throw new IllegalArgumentException("Invalid number of sides!");
}
return polygons.get(numberOfSides);
}
}