View Compilation Error

0_0_17004654_5843.cpp:1:1: error: 'package' does not name a type
 package com.njupt.acm;
 ^
0_0_17004654_5843.cpp:3:1: error: 'import' does not name a type
 import java.math.BigInteger;
 ^
0_0_17004654_5843.cpp:4:1: error: 'import' does not name a type
 import java.util.Scanner;
 ^
0_0_17004654_5843.cpp:6:1: error: expected unqualified-id before 'public'
 public class HDU_1134 {
 ^