Java connects to MySQL. ATM

Package bank;import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.Statement;import java.util.Scanner;public class JDBC {static Statement sc=null; static Scanner sca=new Scanner (System.in); static String username; public static void main (String [] args) throws Exception {/ / this method is to get the operating platform of the database. GetStatement (); System.out.println ("well come to bank of china"); System.out.println ("Please select what you want:" + "1. Register "+" 2. Login "); int m=sca.nextInt (); for (int jackpot;) {if (jackpot 1) {System.out.println (" Please enter a new account "); String bname=sca.next () System.out.println ("Please enter a new password"); String bpassword=sca.next (); String sql= "select * from bank where bname='" + bname+ "'"; ResultSet bq=sc.executeQuery (sql) / / query the database if (bq.next ()) {/ / determine whether the registered account System.out.println also exists in the database ("this account has been registered") } else {sql= "insert into bank (bname,bpassword) values ('" + bname+ "','" + bpassword+ "')"; int i=sc.executeUpdate (sql) / / Update the database and use I to receive the returned data if (iComple0) {System.out.println ("registered successfully") } else {System.out.println ("registration failed") } else if (jacks 2) {for (int winters 1)