View Compilation Error

0_0_30380750_23777\Main.java:1: 错误: 需要class, interface或enum
public static void main(String[] args){
              ^
0_0_30380750_23777\Main.java:3: 错误: 需要class, interface或enum
    int a=sc.nextInt():
    ^
0_0_30380750_23777\Main.java:5: 错误: 需要class, interface或enum
    System.out.print(a+b);
    ^
0_0_30380750_23777\Main.java:7: 错误: 需要class, interface或enum
}
^
4 个错误