新建文件夹
..........\day07
..........\.....\A.class
..........\.....\A.java
..........\.....\B.class
..........\.....\FinalTest.class
..........\.....\FinalTest.java
..........\.....\pm
..........\.....\..\Animal.class
..........\.....\..\Animal.java
..........\.....\..\Attackable.class
..........\.....\..\Attackable.java
..........\.....\..\Bird.class
..........\.....\..\Bird.java
..........\.....\..\Mobile.class
..........\.....\..\Mobile.java
..........\.....\..\Tank.class
..........\.....\..\Tank.java
..........\.....\..\Test.class
..........\.....\..\Test.java
..........\.....\StaticTest.class
..........\.....\StaticTest.java
..........\.....\Test.class
..........\.....\Test.java
..........\day07.txt