View Compilation Error

0_0_34054384_3967\Main.java:4: 错误: 需要class, interface或enum
    public static void main(String[] args) {
                  ^
0_0_34054384_3967\Main.java:6: 错误: 需要class, interface或enum
        Integer a=in.nextInt();
        ^
0_0_34054384_3967\Main.java:7: 错误: 需要class, interface或enum
        Integer b=in.nextInt();
        ^
0_0_34054384_3967\Main.java:8: 错误: 需要class, interface或enum
        System.out.println(a+b);
        ^
0_0_34054384_3967\Main.java:11: 错误: 需要class, interface或enum
    }
    ^
5 个错误