View Compilation Error

0_0_22562432_10163\Main.java:2: 错误: 需要class, interface或enum
calss Main
^
0_0_22562432_10163\Main.java:4: 错误: 需要class, interface或enum
public static void main(String[]args)
              ^
0_0_22562432_10163\Main.java:7: 错误: 需要class, interface或enum
Scanner sc=new Scanner(System.in);
^
0_0_22562432_10163\Main.java:8: 错误: 需要class, interface或enum
while(sc.hasNext())
^
0_0_22562432_10163\Main.java:11: 错误: 需要class, interface或enum
double answer=r*r*r*PI*4/3;
^
0_0_22562432_10163\Main.java:12: 错误: 需要class, interface或enum
System.out.printf("%.3lf",answer);
^
0_0_22562432_10163\Main.java:13: 错误: 需要class, interface或enum
}
^
7 个错误