View Compilation Error

0_0_28896484_18212.cpp:1:1: error: 'package' does not name a type
 package Onlygu;
 ^
0_0_28896484_18212.cpp:3:1: error: 'import' does not name a type
 import java.math.BigInteger;
 ^
0_0_28896484_18212.cpp:4:1: error: 'import' does not name a type
 import java.util.Scanner;
 ^
0_0_28896484_18212.cpp:8:1: error: expected unqualified-id before 'public'
 public class Onlyguard {
 ^