View Compilation Error

0_0_18317923_2716\Main.java:1: 错误: 需要class, interface或enum
 public static void main(String[] args){
               ^
0_0_18317923_2716\Main.java:3: 错误: 需要class, interface或enum
  int a=in.nextInt();
  ^
0_0_18317923_2716\Main.java:4: 错误: 需要class, interface或enum
  int b=in.nextInt();
  ^
0_0_18317923_2716\Main.java:6: 错误: 需要class, interface或enum
  System.out.println((a+b));  
  ^
0_0_18317923_2716\Main.java:7: 错误: 需要class, interface或enum
}
^
5 个错误