JDBC 컬럼이름은 출력되는데 안에 값들이 안보입니다

게시물 수정 , 삭제는 로그인 필요

import oracle.sql.ORAData;

import java.sql.*;

public class Jdbc {
public static void main(String[] args) {
        String driver = "oracle.jdbc.driver.OracleDriver";
       String url="jdbc:oracle:thin:@localhost:1521:xe";
       String user="ORA";
       String pwd="1234";
       Connection con = null;
       PreparedStatement pstmt = null;
       String sql;
       ResultSet rs = null;
       ResultSetMetaData rsmd;
       try {
            Class.forName(driver);
           con = DriverManager.getConnection(url, user, pwd);

           sql = "SELECT * FROM employee";
           pstmt = con.prepareStatement(sql);

           rs = pstmt.executeQuery();
           rsmd = rs.getMetaData();
           int cols = rsmd.getColumnCount();
           for (int i = 1; i <= cols; i++) {
                System.out.println(rsmd.getColumnName(i));
           }
            System.out.println();
           while (rs.next()) {
for(int i = 1; i <= cols; i++)
                    System.out.print(rs.getObject(i));
               System.out.println();
           }
            rs.close();
           pstmt.close();
           con.close();
       }catch(Exception e){
            e.printStackTrace();
       }
    }
}

실행은 잘되는데 결과값을 보면 컬럼 이름만 보입니다..