JDBC insert

package orcale_jdbc;
 
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Scanner;
 
public class insertTest {
    public static void main(String[] args) {
        
        Scanner sc = new Scanner(System.in);
        System.out.println("이름 나이 주소");
 
        String name = sc.nextLine();
        int age = Integer.parseInt(sc.nextLine());
        String addr = sc.nextLine();
 
        Connection conn = null;
        PreparedStatement pstmt = null;
        
        String url = "jdbc:oracle:thin:@localhost:1521:xe";
        String user = "scott";
        String pwd = "tiger";
        
        StringBuilder sql = new StringBuilder();
        sql.append(" insert into member1(no,name,age,addr) ");
        sql.append(" values(member_seq.nextval,?,?,?) ");
                        //일단 무슨값인지 모르므로 물음표로 채워두기
                        //아래에서 값을 채움
/*        
        insert into member(id, name, hiredate, age)
            values(seq.nextval, ?, sysdate, ?);
                
        pstmt.setString(1,'hong');     //첫번째 물음표
        pstmt.setInt(2, 23);        //두번째 물음표
*/        
        
        
        try {
            Class.forName("oracle.jdbc.OracleDriver");
            conn = DriverManager.getConnection(url, user, pwd);
            pstmt = conn.prepareStatement(sql.toString());
            pstmt.setString(1, name);
            pstmt.setInt(2, age);
            pstmt.setString(3, addr);
//            pstmt.setString(1, "엄수빈");
//            pstmt.setInt(2, 49);
//            pstmt.setString(3, "서울");
            int r=pstmt.executeUpdate();
            
            if(r>0)
                System.out.println("자료 입력 성공");
            else
                System.out.println("자료 입력 실패");
        //    System.out.println("연결 성공");
            
        }catch(ClassNotFoundException e) {
            System.out.println(e);
        }catch(SQLException e) {
            System.out.println(e);
        }finally {
            if(pstmt!=null) try {pstmt.close();} catch(SQLException e) {}
            if(conn!=null)  try {conn.close();}  catch(SQLException e) {}
        }
    }
}