View Compilation Error

0_0_36283559_23071.cpp:1:1: error: 'import' does not name a type
 import java.io.BufferedInputStream;
 ^
0_0_36283559_23071.cpp:2:1: error: 'import' does not name a type
 import java.util.HashSet;
 ^
0_0_36283559_23071.cpp:3:1: error: 'import' does not name a type
 import java.util.Scanner;
 ^
0_0_36283559_23071.cpp:4:1: error: 'import' does not name a type
 import java.util.Set;
 ^
0_0_36283559_23071.cpp:6:1: error: expected unqualified-id before 'public'
 public class Main {
 ^