避免isInstance语句

Question

如何重构此示例以避免需要在每个数据类型中检查isInstance的这种情况？有什么可以遵循的模式吗？

public interface GenericData {}

public interface IntegerData extends GenericData{
    public Integer Data();
}

public interface StringData extends GenericData{
    public String Data();
}

public interface Client {
    public boolean LoadData(GenericData data);
}

public class IntegerClientImpl implements Client{
    public boolean LoadData(GenericData data){
        return IntegerData.class.isInstance(data);
    };
}

Answer 1

您可以使用泛型。

public interface Client<Data extends GenericData> {
    public boolean LoadData(Data data);
}

public class IntegerClientImpl implements Client<IntegerData> {
    @Override
    public boolean LoadData(IntegerData data){
        // ...
    }
}