View Compilation Error

0_0_21833735_13171\Main.java:1: 错误: 需要class, interface或enum
public static int add(int i, int j){  
              ^
0_0_21833735_13171\Main.java:5: 错误: 需要class, interface或enum
 }  
 ^
0_0_21833735_13171\Main.java:6: 错误: 需要class, interface或enum
 public static void main(String[] args) {  
               ^
0_0_21833735_13171\Main.java:8: 错误: 需要class, interface或enum
         int sum = 0;  
         ^
0_0_21833735_13171\Main.java:9: 错误: 需要class, interface或enum
         Scanner sc = new Scanner(System.in);   
         ^
0_0_21833735_13171\Main.java:10: 错误: 需要class, interface或enum
         while(sc.hasNext())  
         ^
0_0_21833735_13171\Main.java:13: 错误: 需要class, interface或enum
             b = Integer.parseInt(sc.next());    
             ^
0_0_21833735_13171\Main.java:16: 错误: 需要class, interface或enum
           sum = add(a,b); // 调用函数  
           ^
0_0_21833735_13171\Main.java:17: 错误: 需要class, interface或enum
        System.out.println(sum); // 输出结果  
        ^
0_0_21833735_13171\Main.java:18: 错误: 需要class, interface或enum
         }  
         ^
10 个错误