桥后总结 一
一:
The method getByName(String) of type UserServiceImpl must override or implement a supertype method
翻译:UserServiceImpl类型的getByName(String)方法必须覆盖或实现超类型方法
小白我来解释一下,出现这个错误警告是因为没有实现父类的方法
解决的方法
1.刚刚的UserServiceI接口忘记保存了
2.接口中的方法没有完全实现
二:
@Override (它的理解)
Indicates that a method declaration is intended to override a method declaration in a supertype. If a method is annotated with this annotation type compilers are required to generate an error message unless at least one of the following conditions hold: The method does override or implement a method declared in a supertype. The method has a signature that is override-equivalent to that of any public method declared in Object.
翻译:
指示方法声明旨在重写超类型中的方法声明。如果一个方法是用这种注释类型编译器注释的,则需要生成错误消息,除非至少满足下列条件之一:
该方法确实重写或实现超类型中声明的方法。
该方法具有与Object中声明的任何公共方法相同的覆盖签名