View Compilation Error

0_0_6841108_29869\Main.java:10: 需要 <标识符>
   System.out.println(sum(a,b));
                     ^
0_0_6841108_29869\Main.java:10: 需要 <标识符>
   System.out.println(sum(a,b));
                         ^
0_0_6841108_29869\Main.java:10: 需要 ';'
   System.out.println(sum(a,b));
                          ^
0_0_6841108_29869\Main.java:10: 非法的类型开始
   System.out.println(sum(a,b));
                           ^
0_0_6841108_29869\Main.java:10: 需要 ';'
   System.out.println(sum(a,b));
                             ^
5 错误