View Compilation Error

0_0_17077871_18441\Main.java:3: 错误: 需要class, interface或enum
public Main {
       ^
0_0_17077871_18441\Main.java:4: 错误: 需要class, interface或enum
  public static void main(String[] args) {
                ^
0_0_17077871_18441\Main.java:6: 错误: 需要class, interface或enum
    while (in.hasNext()) System.out.println(in.nextInt() + in.nextInt());
    ^
0_0_17077871_18441\Main.java:7: 错误: 需要class, interface或enum
  }
  ^
4 个错误