创建对象lombok生成器和手动声明的更快方法 [英] faster way to create object lombok builder vs manually declaration
问题描述
在这三种创建对象的方式之间，哪种执行速度更快?
Between these 3 way to create an object, which one is the faster in time of execution ?
Amount.builder().categoryCode("A").coveredAmount(new
BigDecimal(100)).build();
或
Amount cva1 = new Amount();
cva1.setCoveredAmount(new BigDecimal(100));
cva1.setCategoryCode("A");
或
Amount cva1 = new Amount(new Bigdecimal(100), "A");
字段数可以有所不同吗?
And the number of fields can be made difference ?
推荐答案
除了性能比较(花生btw ...)之外，您不应该根据对象的执行时间使用对象创建策略，而应该仅根据您的实际需要和要求使用对象创建策略和最佳做法.
Beyond the performance comparison (peanuts btw...) you should not use a object-creation strategy based on his execution time but merely on your real need , requirements and best practices.
-
Fluent Builder pattern
- 更好的可读性
- 可选属性
- 分步施工
Remark:不要使用此模式来掩盖您的类定义了太多字段的事实……使用类似extract class的模式，而不要进行构建器构造.
Remark : don't use this pattern to hide the fact that your class defines too many fields... use pattern like extract class instead of going through a builder construction.
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Javabean style.这种类型的构造(IMO)是一种不好的做法，因为从无参数构造到调用setter对其进行初始化之间的时间，对象仍然处于不一致状态.
Javabean style. This type of construction is (IMO) a bad practice because the time between the no-arg construction and calls to setters to initialize it, the object stills in an inconsistent state.
Primary constructor.当所有字段均为required时，您更喜欢这种方式.
Primary constructor. You prefer this way when all fields are required.
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