哪错啊!急

import java.sql.*;
public class conbean{
private Connection con;
private Statement st;
private ResultSet rs;
public conbean(){
}
public void getcon(){
con=null;
st=null;
try{
Class.forName("com.mysql.jdbc.Driver");
con=DriverManager.getConnection("jdbc:mysql://localhost:3306/users","root","490507724");
st=con.createStatement();
}catch(Exception e){
e.printStackTrace();
}
}
public ResultSet login(String user,String pwd){
rs=null;
getcon();
try{
rs=st.executeQuery("select*from user where user='"+user"' and pwd='"pwd"'");
}catch(Exception e){
e.printStackTrace();
}
return rs;
}

public int update(String user,String pwd){
int pet=0l;
getcon();
try{
pet=st.exectuteUqdate("i

急！～～～ 急！！！ 急!!!!!!! 急!!!!!!!!!!!!!!!!!!!!! 急!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 急!!!!!!!!!!!!! 急!!!!!!!!!!!!!! 急!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 急!!!!~~~ 急!!~~~~~~~~~~~~~~