jave learns the first section of the code

package li;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class yan {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		//2.建立同数据库的连接
		//url：统一资源定位符
		String url="jdbc:oracle:thin:@10.25.84.126:1521:orcl";
		String user="scott";
		String password="tiger";
		Connection con=null;
		Statement st=null;
		String sql="select * from DEPT";
		String sql1="delete from USERTEST";
		ResultSet rs=null;
		PreparedStatement pst=null;
		//1.加载驱动
		try{
			Class.forName("oracel.jdbc.driver.OracelDriver");
			con = DriverManager.getConnection(url, user, password);
			System.out.println("数据库连接成功！");
		}catch (ClassNotFoundException e){
			//TODO Auto-generated catch block
			e.printStackTrace();
		}catch(SQLException e){
			//TODO Auto-generated catch block
			e.printStackTrace();
		}
	}