View Compilation Error

0_0_39255815_29181\Main.java:1: 错误: 需要class, interface或enum
    public static void main(String[] args) {
                  ^
0_0_39255815_29181\Main.java:4: 错误: 需要class, interface或enum
        while (in.hasNext()){
        ^
0_0_39255815_29181\Main.java:6: 错误: 需要class, interface或enum
        }
        ^
3 个错误