View Compilation Error

0_0_30381728_16207\Main.java:1: 错误: 需要class, interface或enum
public static void main(String[] args) {
              ^
0_0_30381728_16207\Main.java:3: 错误: 需要class, interface或enum
        Scanner sc = new Scanner(System.in);
        ^
0_0_30381728_16207\Main.java:4: 错误: 需要class, interface或enum
        while (true) {
        ^
0_0_30381728_16207\Main.java:6: 错误: 需要class, interface或enum
            b =sc.nextInt();
            ^
0_0_30381728_16207\Main.java:7: 错误: 需要class, interface或enum
            System.out.println(a + b);
            ^
0_0_30381728_16207\Main.java:8: 错误: 需要class, interface或enum
        }
        ^
6 个错误