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Java como resolver este erros no netbeans

raphael46

Por raphael46
em Java/Android SDK

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raphael46
 

raphael46

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E para um sistema de cadastro e vendas
    } 

public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(MeuMenu.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(MeuMenu.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(MeuMenu.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(MeuMenu.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new MeuMenu().setVisible(true);
            }
        });
    }
    
    

    // Variables declaration - do not modify                     
    private javax.swing.JButton btnClientes;
    private javax.swing.JButton btnProdutos;
    private javax.swing.JButton btnSair;
    private javax.swing.JButton btnVendas;
    private javax.swing.JLabel jLabel1;
    // End of variables declaration                   
    ArrayList<Cliente> cliente = new ArrayList<Cliente>();
    
       Connection conexao = MinhaConexao.getInstance().sqlConnection;
        //fill client list
        String query = "SELECT nome, cpf FROM cliente";
        Statement stmt = null;
        try
        {
            stmt = conexao.createStatement();
            ResultSet rs = stmt.executeQuery(query);
            while(rs.next()){
                String nome = rs.getString("nome");
                String cpf = rs.getString("cpf");
                
                
                //adiciona cliente na lista
                cliente.add(new Cliente(nome, cpf));
            }
        }catch(Exception e){
            e.printStackTrace();
        }
        
        DefaultListModel listModel = new DefaultListModel();
                
        for(Cliente c : cliente){
            listModel.addElement(new String(c.getNome() + " - " + c.getCPF()));
            System.out.println("Client name: " + c.getNome());
        }
        
        listClientes.setModel(listModel);
   }
       
   
    @Override
    public void repaint() {
        super.repaint(); //To change body of generated methods, choose Tools | Templates.
        this.atualizaClientes();
    }

}

 

errros no console

Exception in thread "main" java.lang.ClassFormatError: Duplicate field name&signature in class file interfaceGrafica/MeuMenu
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at sistemadecadastro.SistemaDeCadastro.main(SistemaDeCadastro.java:35)
Java Result: 1

 

image.rar

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raphael46
 

raphael46

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  • Autor
Postado 
package interfaceGrafica;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import javax.swing.DefaultListModel;
import javax.swing.WindowConstants;
import sistemadecadastro.Cliente;
import sistemadecadastro.MinhaConexao;

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author Eduardo
 */
public class MeuMenu extends javax.swing.JFrame {

    /**
     * Creates new form MeuMenu
     */
    public MeuMenu() {
        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        btnProdutos = new javax.swing.JButton();
        btnVendas = new javax.swing.JButton();
        btnSair = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();
        btnClientes = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        btnProdutos.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
        btnProdutos.setText("Produtos");
        btnProdutos.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnProdutosActionPerformed(evt);
            }
        });

        btnVendas.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
        btnVendas.setText("Vendas");
        btnVendas.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnVendasActionPerformed(evt);
            }
        });

        btnSair.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
        btnSair.setText("Sair");

        jLabel1.setFont(new java.awt.Font("Tahoma", 0, 36)); // NOI18N
        jLabel1.setText("Sistema de Vendas");

        btnClientes.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
        btnClientes.setText("Clientes");
        btnClientes.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnClientesActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(37, 37, 37)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 323, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(btnVendas, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(btnClientes, javax.swing.GroupLayout.PREFERRED_SIZE, 138, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(btnSair, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(btnProdutos, javax.swing.GroupLayout.DEFAULT_SIZE, 130, Short.MAX_VALUE))))
                .addContainerGap(40, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(btnClientes, javax.swing.GroupLayout.DEFAULT_SIZE, 80, Short.MAX_VALUE)
                    .addComponent(btnProdutos, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGap(40, 40, 40)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(btnVendas, javax.swing.GroupLayout.PREFERRED_SIZE, 75, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnSair, javax.swing.GroupLayout.PREFERRED_SIZE, 75, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(37, 37, 37))
        );

        pack();
    }// </editor-fold>                        

    private void btnProdutosActionPerformed(java.awt.event.ActionEvent evt) {                                            
        // TODO add your handling code here:
    }                                           

    private void btnClientesActionPerformed(java.awt.event.ActionEvent evt) {                                            
        // TODO add your handling code here:

       MeusClientes mc = new MeusClientes();
       mc.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
       mc.setVisible(true);

    }                                           

    private void btnVendasActionPerformed(java.awt.event.ActionEvent evt) {                                          
         AdiocinarVenda v = new AdiocinarVenda();
       v.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
       v.setVisible(true);
    }                                         

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(MeuMenu.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(MeuMenu.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(MeuMenu.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(MeuMenu.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new MeuMenu().setVisible(true);
            }
        });
    }
    
    

    // Variables declaration - do not modify                     
    private javax.swing.JButton btnClientes;
    private javax.swing.JButton btnProdutos;
    private javax.swing.JButton btnSair;
    private javax.swing.JButton btnVendas;
    private javax.swing.JLabel jLabel1;
    // End of variables declaration                   
    ArrayList<Cliente> cliente = new ArrayList<Cliente>();
    
       Connection conexao = MinhaConexao.getInstance().sqlConnection;
        //fill client list
        String query = "SELECT nome, cpf FROM cliente";
        Statement stmt = null;
        try
        {
            stmt = conexao.createStatement();
            ResultSet rs = stmt.executeQuery(query);
            while(rs.next()){
                String nome = rs.getString("nome");
                String cpf = rs.getString("cpf");
                
                
                //adiciona cliente na lista
                cliente.add(new Cliente(nome, cpf));
            }
        }catch(Exception e){
            e.printStackTrace();
        }
        
        DefaultListModel listModel = new DefaultListModel();
                
        for(Cliente c : cliente){
            listModel.addElement(new String(c.getNome() + " - " + c.getCPF()));
            System.out.println("Client name: " + c.getNome());
        }
        
        listClientes.setModel(listModel);
   }
       
   
    @Override
    public void repaint() {
        super.repaint(); //To change body of generated methods, choose Tools | Templates.
        this.atualizaClientes();
    }

}

 

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raphael46
 

raphael46

Postado
  • Autor
Postado
3 horas atrás, Matheus Andrei Jankovski disse:

Exception in thread "main" java.lang.ClassFormatError: Duplicate field name&signature in class file interfaceGrafica/MeuMenu

 

Posta o código do "MeuMenu" 

package interfaceGrafica;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import javax.swing.DefaultListModel;
import javax.swing.WindowConstants;
import sistemadecadastro.Cliente;
import sistemadecadastro.MinhaConexao;

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author Eduardo
 */
public class MeuMenu extends javax.swing.JFrame {

    /**
     * Creates new form MeuMenu
     */
    public MeuMenu() {
        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        btnProdutos = new javax.swing.JButton();
        btnVendas = new javax.swing.JButton();
        btnSair = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();
        btnClientes = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        btnProdutos.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
        btnProdutos.setText("Produtos");
        btnProdutos.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnProdutosActionPerformed(evt);
            }
        });

        btnVendas.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
        btnVendas.setText("Vendas");
        btnVendas.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnVendasActionPerformed(evt);
            }
        });

        btnSair.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
        btnSair.setText("Sair");

        jLabel1.setFont(new java.awt.Font("Tahoma", 0, 36)); // NOI18N
        jLabel1.setText("Sistema de Vendas");

        btnClientes.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
        btnClientes.setText("Clientes");
        btnClientes.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnClientesActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(37, 37, 37)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 323, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(btnVendas, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(btnClientes, javax.swing.GroupLayout.PREFERRED_SIZE, 138, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(btnSair, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(btnProdutos, javax.swing.GroupLayout.DEFAULT_SIZE, 130, Short.MAX_VALUE))))
                .addContainerGap(40, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(btnClientes, javax.swing.GroupLayout.DEFAULT_SIZE, 80, Short.MAX_VALUE)
                    .addComponent(btnProdutos, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGap(40, 40, 40)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(btnVendas, javax.swing.GroupLayout.PREFERRED_SIZE, 75, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnSair, javax.swing.GroupLayout.PREFERRED_SIZE, 75, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(37, 37, 37))
        );

        pack();
    }// </editor-fold>                        

    private void btnProdutosActionPerformed(java.awt.event.ActionEvent evt) {                                            
        // TODO add your handling code here:
    }                                           

    private void btnClientesActionPerformed(java.awt.event.ActionEvent evt) {                                            
        // TODO add your handling code here:

       MeusClientes mc = new MeusClientes();
       mc.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
       mc.setVisible(true);

    }                                           

    private void btnVendasActionPerformed(java.awt.event.ActionEvent evt) {                                          
         AdiocinarVenda v = new AdiocinarVenda();
       v.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
       v.setVisible(true);
    }                                         

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(MeuMenu.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(MeuMenu.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(MeuMenu.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(MeuMenu.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new MeuMenu().setVisible(true);
            }
        });
    }
    
    

    // Variables declaration - do not modify                     
    private javax.swing.JButton btnClientes;
    private javax.swing.JButton btnProdutos;
    private javax.swing.JButton btnSair;
    private javax.swing.JButton btnVendas;
    private javax.swing.JLabel jLabel1;
    // End of variables declaration                   
    ArrayList<Cliente> cliente = new ArrayList<Cliente>();
    
       Connection conexao = MinhaConexao.getInstance().sqlConnection;
        //fill client list
        String query = "SELECT nome, cpf FROM cliente";
        Statement stmt = null;
        try
        {
            stmt = conexao.createStatement();
            ResultSet rs = stmt.executeQuery(query);
            while(rs.next()){
                String nome = rs.getString("nome");
                String cpf = rs.getString("cpf");
                
                
                //adiciona cliente na lista
                cliente.add(new Cliente(nome, cpf));
            }
        }catch(Exception e){
            e.printStackTrace();
        }
        
        DefaultListModel listModel = new DefaultListModel();
                
        for(Cliente c : cliente){
            listModel.addElement(new String(c.getNome() + " - " + c.getCPF()));
            System.out.println("Client name: " + c.getNome());
        }
        
        listClientes.setModel(listModel);
   }
       
   
    @Override
    public void repaint() {
        super.repaint(); //To change body of generated methods, choose Tools | Templates.
        this.atualizaClientes();
    }

}

 

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