View Compilation Error

0_0_14829837_29891\Main.java:2: 错误: 需要class, interface或enum
public calss Main{
       ^
0_0_14829837_29891\Main.java:3: 错误: 需要class, interface或enum
    public static void main(String[]args){
                  ^
0_0_14829837_29891\Main.java:5: 错误: 需要class, interface或enum
      int a,b;
      ^
0_0_14829837_29891\Main.java:6: 错误: 需要class, interface或enum
      a = in.nextInt();
      ^
0_0_14829837_29891\Main.java:7: 错误: 需要class, interface或enum
      b = in.nextInt();
      ^
0_0_14829837_29891\Main.java:8: 错误: 需要class, interface或enum
      in.close();
      ^
0_0_14829837_29891\Main.java:9: 错误: 需要class, interface或enum
      System.out.println((long)a + b);
      ^
0_0_14829837_29891\Main.java:10: 错误: 需要class, interface或enum
   }
   ^
8 个错误