java關鍵詞易忽視點

1 class 用public 修飾時，只能與abstract & final 聯用

Illegal modifier for the class InnerDemo04; only public, abstract & final are permitted

2 方法中的內部類只能用abstract or final

Illegal modifier for the local class Inner05; only abstract or final is permitted

3 外部類不能用static，內部類(pulic static class、static class)可以用

Illegal modifier for the class Outer08; only public, abstract & final are permitted