View Compilation Error

0_0_15937685_13865\Main.java:2: 错误: 需要class, interface或enum
 public static void main(String[] args) {
               ^
0_0_15937685_13865\Main.java:4: 错误: 需要class, interface或enum
  int a = 0;
  ^
0_0_15937685_13865\Main.java:5: 错误: 需要class, interface或enum
  int b = 0;
  ^
0_0_15937685_13865\Main.java:6: 错误: 需要class, interface或enum
  int sum = 0;
  ^
0_0_15937685_13865\Main.java:7: 错误: 需要class, interface或enum
  while(scanner.hasNext()){
  ^
0_0_15937685_13865\Main.java:9: 错误: 需要class, interface或enum
   b = scanner.nextInt();
   ^
0_0_15937685_13865\Main.java:10: 错误: 需要class, interface或enum
   sum = a + b;
   ^
0_0_15937685_13865\Main.java:11: 错误: 需要class, interface或enum
   System.out.println(sum);
   ^
0_0_15937685_13865\Main.java:13: 错误: 需要class, interface或enum
  }
  ^
9 个错误