null object

2026-04-29

网络虚拟物体; 空物体层; 空对象; 是空对象; 空宾语 双语例句 In Java, it is a common practice to assign a null value to a reference type when it is not referencing any object. 在Java中，当引用类型没有引用任何对象时将其赋空值，这是公共的操作。 SDOs can have data object properties that can be any of the...