準備語句錯誤試圖從DB

Question

收到密碼，我得到一個錯誤，在這種方法時：

public String databaseServer(String email)throws IllegalArgumentException { 
     Connection dbCon = null; 
     Statement stmt = null; 
     String password = null; 

     System.out.print(email); 
     String query = "SELECT password FROM user WHERE email = ?"; 

      try{ 
        dbCon = initializeDBConnection(); 
        PreparedStatement preparedStatement = dbCon.prepareStatement(query); 
        preparedStatement.setString(1, email); 
        ResultSet rs = preparedStatement.executeQuery(query); 
        while (rs.next()) { 
        password = rs.getString("password");  
        }  

      } catch (SQLException ex) { 
       Logger.getLogger(Collection.class.getName()).log(Level.SEVERE, null, ex); 
      } 
       //close connection ,stmt and resultset here  
     return password; 
    } 

的錯誤是：com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '?' at line 1

我檢查連接和輸入字符串，他們都工作正常。

有人知道我在做什麼錯嗎？取而代之的

ResultSet rs = preparedStatement.executeQuery(query); 

Answer 1

做

ResultSet rs = preparedStatement.executeQuery();