在Eclipse中出现这种问题怎么解决？

Question

Exception in thread "main" java.lang.Error: Unresolved compilation problems: 

Cannot instantiate the type Mouse

Cannot instantiate the type KeyBoard

at com.Text.Demo2.main(Demo2.java:9)

Answer 1

无法实例化类型Mouse KeyBoard要么这两个类型是接口或是抽象类或是构造方法私有化了看看这两个类型的定义

Answer 2

编译错误