Q erro é essE?

import javax.swing.*;
import java.awt.*;
import java.util.Calendar;
import java.awt.event.*;
import java.text.*;
import java.util.Date;
import java.sql.*;
import org.apache.xml.utils.synthetic.Class;

public void conectBanco() {
		
		try {
			Class.forName("com.mysql.jdbc.Driver").newInstance();
			con = DriverManager.getConnection("jdbc:mysql//localhost:3306/cadastro","root","");
			stm = con.createStatement();
		}
		catch(Exception ex) {
			System.err.println(ex);
		}
	}

public void conectBanco() <b>throws SQLException</b>{

try {

Class.forName(“com.mysql.jdbc.Driver”).newInstance();

con = DriverManager.getConnection(“jdbc:mysql//localhost:3306/cadastro”,“root”,"");

stm = con.createStatement();

}

catch(Exception ex) {

System.err.println(ex);

}

}

import javax.swing.*;
import java.awt.*;
import java.util.Calendar;
import java.awt.event.*;
import java.text.*;
import java.util.Date;
import java.sql.*;
import org.apache.xml.utils.synthetic.Class;

public class SistemaLocadora extends JFrame {
	private JPanel PainelCentral,PainelStatus,PainelEsq,
				   PainelCent,PainelDir;
	private JMenuBar mbPrincipal;
	private JMenu mArquivo,mLocacao,mRelatorio,mSobre,
				  mNovo,mExclui,mAltera,mConsulta;
	private JMenuItem miNovoCli,miNovoTit,miExcluiCli,
					  miExcluiTit,miAlteraCli,miAlteraTit,
					  miConsultaCli,miConsultaTit,miNovaLoc,
					  miExcluiLoc,miAlteraLoc,miConsultaLoc,
					  miReserva,miRelatCli,miRelatTit,miSair;
	private Container c = getContentPane();
	private JLabel lbData,lbHora,lbOperador;
	private String data1,hora1;
	private Timer timer;
	private int dia,mes,ano;
	private UIManager.LookAndFeelInfo[] visual = UIManager.getInstalledLookAndFeels();
	private JToolBar tBar;
	private Connection con = null;
	private Statement stm = null;

	public SistemaLocadora(String user) {
		super("::Sistema de Locadora");
		criaTela();
		
		//Calendar cd = Calendar.getInstance();
		/*data1 = cd.get(Calendar.DATE) +"/"+ cd.get(Calendar.MONTH) +"/"+
				cd.get(Calendar.YEAR);*/
		/*dia = cd.get(Calendar.DATE);
		mes = cd.get(Calendar.MONTH);
		ano = cd.get(Calendar.YEAR);
		if(mes == 0)
			mes = 01;
		if(mes == 1 )
			mes = 02;
		if(mes == 2)
			mes = 03;
		if(mes == 3)
			mes = 04;
		if(mes == 4)
			mes = 05;
		if(mes == 5)
			mes = 06;
		if(mes == 6)
			mes = 07;
		if(mes == 7)
			mes = 8;
		if(mes == 8)
			mes = 9;
		if(mes == 9)
			mes = 10;
		if(mes == 10)
			mes = 11;
		if(mes == 11)
			mes = 12;
		if(dia < 10)
		    data1 = "0" + dia + " / " + mes + " / " + ano;
		if(dia >= 10)
			data1 = dia + " / " + mes + " / " + ano;*/
		
		Date data = new Date();
		SimpleDateFormat estiloData = new SimpleDateFormat("dd/MM/yyyy");
		
		lbData.setText(estiloData.format(data));
		
		timer = new Timer(1000,new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				Calendar cd1 = Calendar.getInstance();
				int hora = cd1.get(Calendar.HOUR_OF_DAY);
				int min = cd1.get(Calendar.MINUTE);
				int seg = cd1.get(Calendar.SECOND);
				
				hora1 = hora +" : "+ min +" : "+ seg;
				
				lbHora.setText(hora1);
			}
		}
		);
		timer.start();
		lbOperador.setText("Operador: "+user);
		conectBanco();
	}

	/*public static void main(String[] args) {
		SistemaLocadora sis = new SistemaLocadora();
		sis.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}*/
	
	public void criaTela() {
		try {
			UIManager.setLookAndFeel(visual[2].getClassName());
		}
		catch(Exception e) {
			e.printStackTrace();
		}
		
		mbPrincipal = new JMenuBar();
		setJMenuBar(mbPrincipal);
		
		tBar = new JToolBar();
		tBar.setPreferredSize(new Dimension(50,30));
		c.add(tBar, BorderLayout.NORTH);
		
		mArquivo = new JMenu("Arquivo");
		mLocacao = new JMenu("Locação");
		mRelatorio = new JMenu("Relatórios");
		mSobre = new JMenu("Sobre");
		mNovo = new JMenu("Novo");
		mExclui = new JMenu("Excluir");
		mAltera = new JMenu("Alterar");
		mConsulta = new JMenu("Consulta");
		
		miNovoCli = new JMenuItem("Cliente");
		miNovoTit = new JMenuItem("Título");
		miExcluiCli = new JMenuItem("Cliente");
		miExcluiTit = new JMenuItem("Título");
		miAlteraCli = new JMenuItem("Cliente");
		miAlteraTit = new JMenuItem("Título");
		miConsultaCli = new JMenuItem("Cliente");
		miConsultaTit = new JMenuItem("Título");
		miSair = new JMenuItem("Sair");
		
		mArquivo.setMnemonic('A');
		mLocacao.setMnemonic('o');
		mRelatorio.setMnemonic('l');
		mSobre.setMnemonic('b');
		
		mbPrincipal.add(mArquivo);
		mbPrincipal.add(mLocacao);
		mbPrincipal.add(mRelatorio);
		mbPrincipal.add(mSobre);
		
		mArquivo.add(mNovo);
		mNovo.add(miNovoCli);
		mNovo.add(miNovoTit);
		mArquivo.add(mExclui);
		mExclui.add(miExcluiCli);
		mExclui.add(miExcluiTit);
		mArquivo.add(mAltera);
		mAltera.add(miAlteraCli);
		mAltera.add(miAlteraTit);
		mArquivo.add(mConsulta);
		mConsulta.add(miConsultaCli);
		mConsulta.add(miConsultaTit);
		mArquivo.addSeparator();
		mArquivo.add(miSair);
		
		PainelCentral = new JPanel();
		PainelStatus = new JPanel();
		PainelEsq = new JPanel();
		PainelCent = new JPanel();
		PainelDir = new JPanel();
		PainelStatus.setLayout(new BorderLayout(1,1));
		
		PainelCentral.setBorder(BorderFactory.createLineBorder(Color.LIGHT_GRAY));
		c.add(PainelCentral);
		
		PainelStatus.setBorder(BorderFactory.createEtchedBorder(0));
		c.add(PainelStatus,BorderLayout.SOUTH);
		
		PainelDir.setBorder(BorderFactory.createLineBorder(Color.GRAY));
		PainelDir.setPreferredSize(new Dimension(75,20));
		lbHora = new JLabel("");
		PainelDir.add(lbHora);
		PainelDir.setToolTipText("Dia da semana, data");
		PainelStatus.add(PainelDir,BorderLayout.EAST);
		
		PainelCent.setBorder(BorderFactory.createLineBorder(Color.GRAY));
		PainelCent.setPreferredSize(new Dimension(50,25));
		lbData = new JLabel("",JLabel.CENTER);
		PainelCent.add(lbData);
		PainelStatus.add(PainelCent,BorderLayout.CENTER);
		
		PainelEsq.setLayout(new GridLayout(1,0));
		PainelEsq.setBorder(BorderFactory.createLineBorder(Color.GRAY));
		PainelEsq.setPreferredSize(new Dimension(640,20));
		lbOperador = new JLabel("");
		lbOperador.setForeground(Color.BLUE);
		lbOperador.setFont(new Font("Serif",Font.BOLD,13));
		PainelEsq.add(lbOperador);
		PainelStatus.add(PainelEsq,BorderLayout.WEST);
		
		setSize(800,600);
		
		//inicio da função que faz com que a tela apareça no meio
		//do video
		Dimension video = Toolkit.getDefaultToolkit().getScreenSize();
		Dimension video2= video.getSize();
		Dimension form = getSize();
		setLocation((video2.width - form.width)/2,(video2.height - form.height)/2);
		//fim da função
		
		show();
	}
	
	public void conectBanco() {
		
		try {
			Class.forName("com.mysql.jdbc.Driver").newInstance();
			con = DriverManager.getConnection("jdbc:mysql://localhost:3306/cadastro","root","");
			stm = con.createStatement();
			stm.execute("SELECT * FROM cadastros");
			ResultSet rs = stm.getResultSet();
			while(rs.next()) {
				int cod = rs.getInt("Codigo");
				System.out.println("Codigo:"+cod);
			}
		}
		catch(Exception ex) {
			System.err.println(ex);
		}
	}
}