View Compilation Error

0_0_33259292_31109.cpp:1:1: error: 'package' does not name a type
 package exercise;
 ^
0_0_33259292_31109.cpp:3:1: error: 'import' does not name a type
 import java.math.BigDecimal;
 ^
0_0_33259292_31109.cpp:4:1: error: 'import' does not name a type
 import java.math.BigInteger;
 ^
0_0_33259292_31109.cpp:5:1: error: 'import' does not name a type
 import java.util.HashSet;
 ^
0_0_33259292_31109.cpp:6:1: error: 'import' does not name a type
 import java.util.Scanner;
 ^
0_0_33259292_31109.cpp:7:1: error: 'import' does not name a type
 import java.util.Vector;
 ^
0_0_33259292_31109.cpp:9:1: error: expected unqualified-id before 'public'
 public class Main {
 ^