View Compilation Error

0_0_21854878_10191.cpp:1:1: error: 'package' does not name a type
 package haohaoxuexibei;
 ^
0_0_21854878_10191.cpp:3:1: error: 'import' does not name a type
 import java.util.Scanner;
 ^
0_0_21854878_10191.cpp:5:1: error: expected unqualified-id before 'public'
 public class Demo1 {
 ^