我写了这段代码，但我无法理解我的错误

Question

import java.io.BufferedReader;

import java.sql.Connection;

import java.sql.DriverManager;

public class JdbcApp02
{

    public static void main(String[] args)throws Exception 
    {
        Class.forName("oracle.jdbc.OracleDriver");
        Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","system","Rajat709$");
        Statement st=con.createStatement();
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        System.out.println("Enter Table Name : ");
        String tname=br.readLine();
        String query="create table "+tname+"(ENO number(4) primary key,ENAME varchar2(10),ESAL float(5),EADDR varchar2(10))";
        st.executeUpdate(query);
        System.out.println("Table "+tname+" is created successfully");
        st.close();
        con.close();
    }
}

/*
ERROR:
JdbcApp02.java:14: error: cannot find symbol
                Statement st=con.createStatement();
                ^
  symbol:   class Statement
  location: class JdbcApp02
JdbcApp02.java:15: error: cannot find symbol
                BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
                                                         ^
  symbol:   class InputStreamReader
  location: class JdbcApp02
2 errors
*/