View Compilation Error

1_866_4747_1679.cpp:3:1: error: 'import' does not name a type
 import java.io.OutputStream;
 ^
1_866_4747_1679.cpp:4:1: error: 'import' does not name a type
 import java.io.IOException;
 ^
1_866_4747_1679.cpp:5:1: error: 'import' does not name a type
 import java.io.InputStream;
 ^
1_866_4747_1679.cpp:6:1: error: 'import' does not name a type
 import java.io.PrintWriter;
 ^
1_866_4747_1679.cpp:7:1: error: 'import' does not name a type
 import java.io.StreamTokenizer;
 ^
1_866_4747_1679.cpp:8:1: error: 'import' does not name a type
 import java.util.ArrayList;
 ^
1_866_4747_1679.cpp:9:1: error: 'import' does not name a type
 import java.util.Collections;
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1_866_4747_1679.cpp:10:1: error: 'import' does not name a type
 import java.util.HashSet;
 ^
1_866_4747_1679.cpp:11:1: error: 'import' does not name a type
 import java.util.StringTokenizer;
 ^
1_866_4747_1679.cpp:12:1: error: 'import' does not name a type
 import java.io.IOException;
 ^
1_866_4747_1679.cpp:13:1: error: 'import' does not name a type
 import java.io.BufferedReader;
 ^
1_866_4747_1679.cpp:14:1: error: 'import' does not name a type
 import java.io.InputStreamReader;
 ^
1_866_4747_1679.cpp:15:1: error: 'import' does not name a type
 import java.io.InputStream;
 ^
1_866_4747_1679.cpp:21:1: error: expected unqualified-id before 'public'
 public class Main {
 ^