View Compilation Error

0_0_28014473_20892.cpp:1:1: error: 'package' does not name a type
 package cn.oj.test;
 ^
0_0_28014473_20892.cpp:2:1: error: 'import' does not name a type
 import java.io.*;
 ^
0_0_28014473_20892.cpp:3:1: error: 'import' does not name a type
 import java.util.*;
 ^
0_0_28014473_20892.cpp:4:3: error: expected unqualified-id before 'public'
   public class Main{
   ^