Boa noite pessoal.
Estou tentando fazer uma interface gráfica para uma simples calculadora que chamará métodos remotos para fazer as operações de soma e subtração usando RMI, mas estou tendo as seguintes exceções:
Janela.java:58: unreported exception java.rmi.RemoteException; must be caught or declared to be thrown
somadorActionPerformed(evt);
^
Janela.java:66: unreported exception java.rmi.RemoteException; must be caught or declared to be thrown
subtratorActionPerformed(evt);
^
Janela.java:198: unreported exception java.rmi.RemoteException; must be caught or declared to be thrown
new Janela().setVisible(true);
^
3 errors
O que estou fazendo de errado? Aqui coloco o código da interface, espero que possam mu ajudar.
import javax.swing.JOptionPane;
import java.rmi.RemoteException;
import java.rmi.Naming;
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* @author robgeek
*/
public class Janela extends javax.swing.JFrame {
/**
* Creates new form Janela
*/
public Janela() throws RemoteException {
try {
calc = (Inter_Calculadora) Naming.lookup("//192.168.1.101/CoreCalculadora");
} catch (RemoteException e) {
System.out.println();
System.out.println("RemoteException: " + e.toString());
} catch (Exception e) {
System.out.println();
System.out.println("Exception: " + e.toString());
}
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">//GEN-BEGIN:initComponents
private void initComponents() {
campo1 = new javax.swing.JTextField();
campo2 = new javax.swing.JTextField();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
somador = new javax.swing.JButton();
subtrator = new javax.swing.JButton();
resposta = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Calculadora Básica");
jLabel1.setText("Número 1");
jLabel2.setText("Número 2");
somador.setText("+");
somador.setToolTipText("Somar");
somador.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt){
somadorActionPerformed(evt);
}
});
subtrator.setText("-");
subtrator.setToolTipText("Subtrair");
subtrator.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt){
subtratorActionPerformed(evt);
}
});
resposta.setText("O resultado é: ");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(72, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(resposta)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addGroup(layout.createSequentialGroup()
.addComponent(somador, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 37, Short.MAX_VALUE)
.addComponent(subtrator, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE))
.addComponent(campo2, javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(campo1, javax.swing.GroupLayout.Alignment.LEADING))))
.addGap(115, 115, 115))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(65, 65, 65)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(campo1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1))
.addGap(59, 59, 59)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(campo2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel2))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(somador)
.addComponent(subtrator))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 32, Short.MAX_VALUE)
.addComponent(resposta)
.addGap(34, 34, 34))
);
pack();
}// </editor-fold>//GEN-END:initComponents
private void somadorActionPerformed(java.awt.event.ActionEvent evt) throws RemoteException {//GEN-FIRST:event_somadorActionPerformed
int numero1, numero2;
try{
numero1 = Integer.parseInt(
this.campo1.getText());
}catch (Exception e){
JOptionPane.showMessageDialog(this, "Primeiro número inválido",
"Erro",JOptionPane.ERROR_MESSAGE);
return;
}
try{
numero2 = Integer.parseInt(
this.campo2.getText());
}catch (Exception e){
JOptionPane.showMessageDialog(this, "Secundo número inválido",
"Erro",JOptionPane.ERROR_MESSAGE);
return;
}
int resposta = this.calc.somar(numero1, numero2);
this.resposta.setText("O resultado é: "+ resposta);
}//GEN-LAST:event_somadorActionPerformed
private void subtratorActionPerformed(java.awt.event.ActionEvent evt) throws RemoteException {//GEN-FIRST:event_subtratorActionPerformed
int numero1, numero2;
try {
numero1 = Integer.parseInt(
this.campo1.getText());
} catch (Exception e) {
JOptionPane.showMessageDialog(this, "Primeiro número inválido",
"Erro", JOptionPane.ERROR_MESSAGE);
return;
}
try {
numero2 = Integer.parseInt(
this.campo2.getText());
} catch (Exception e) {
JOptionPane.showMessageDialog(this, "Secundo número inválido",
"Erro", JOptionPane.ERROR_MESSAGE);
return;
}
int resposta = this.calc.subtrair(numero1, numero2);
this.resposta.setText("O resultado é: " + resposta);
}//GEN-LAST:event_subtratorActionPerformed
/**
* @param args the command line arguments
*/
public static void main(String args[]) throws RemoteException {
/*
* 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(Janela.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Janela.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Janela.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Janela.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 Janela().setVisible(true);
}
});
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JTextField campo1;
private javax.swing.JTextField campo2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel resposta;
private javax.swing.JButton somador;
private javax.swing.JButton subtrator;
private Inter_Calculadora calc; //Declarando calc.
// End of variables declaration//GEN-END:variables
}
Obrigado.