jdbc program for deleting a record

//jdbc program for deleting a record
//STEP 1. Import required packages
import java.sql.*;

public class DelEmp {
   // JDBC driver name and database URL
   static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
   static final String DB_URL = "jdbc:mysql://localhost/test";

   //  Database credentials
   static final String USER = "root";
   static final String PASS = "admin";
 
   public static void main(String[] args) {
   Connection conn = null;
   Statement stmt = null;
   try{
      //STEP 2: Register JDBC driver
      Class.forName("com.mysql.jdbc.Driver");

      //STEP 3: Open a connection
      System.out.println("Connecting to a selected database...");
      conn = DriverManager.getConnection(DB_URL, USER, PASS);
      System.out.println("Connected database successfully...");
     
      //STEP 4: Execute a query
      System.out.println("Creating statement...");
      stmt = conn.createStatement();
      String sql = "DELETE FROM emp " +
                   "WHERE empno = 101";
      stmt.executeUpdate(sql);

      // Now you can extract all the records
      // to see the remaining records
      sql = "SELECT empno, ename, sal, hiredate,deptno FROM emp";
      ResultSet rs = stmt.executeQuery(sql);

      while(rs.next()){
         //Retrieve by column name
         int id  = rs.getInt("empno");
         String first = rs.getString("ename");
         double sal = rs.getInt("sal");
//         date hiredate=res.getDate("hiredate");
         int deptno = rs.getInt("deptno");

         //Display values
         System.out.print("empno: " + id);
         System.out.print(", ename: " + first);
         System.out.print(", sal: " + sal);
//         System.out.println(", hiredate: " + hiredate);
      }
      rs.close();
   }catch(SQLException se){
      //Handle errors for JDBC
      se.printStackTrace();
   }catch(Exception e){
      //Handle errors for Class.forName
      e.printStackTrace();
   }finally{
      //finally block used to close resources
      try{
         if(stmt!=null)
            conn.close();
      }catch(SQLException se){
      }// do nothing
      try{
         if(conn!=null)
            conn.close();
      }catch(SQLException se){
         se.printStackTrace();
      }//end finally try
   }//end try
   System.out.println("Goodbye!");
}//end main
}//end JDBCExample