View Compilation Error

0_0_20192669_5383.cpp:1:1: error: 'package' does not name a type
 package mod3;
 ^
0_0_20192669_5383.cpp:2:1: error: 'import' does not name a type
 import java.math.*;
 ^
0_0_20192669_5383.cpp:3:1: error: 'import' does not name a type
 import java.io.*;
 ^
0_0_20192669_5383.cpp:4:1: error: 'import' does not name a type
 import java.util.*;
 ^
0_0_20192669_5383.cpp:5:1: error: expected unqualified-id before 'public'
 public class Main {
 ^