Calculadora Java

welder.a · 14 de julho de 2017

Olá a todos peço uma ajuda. Não sei porque está dando erro na minha progamação ja tentei consertar de diversos modo mas não sai o erro

*Obs: Sou leigo em Java

A quem puder agradeço!!

package Telas;

import javax.swing.JOptionPane;

/**
*
* @author update
*/
public class CalculadoraJFrame extends javax.swing.JFrame {

double num1, num2, resultado;
char operacao;

/**
* Creates new form CalculadoraJFrame
*/
public CalculadoraJFrame() {
initComponents();

jPanel1.setFocusable(true);
// lbTela.setBorder (new EtchedBorder());
}

/**
* 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() {
bindingGroup = new org.jdesktop.beansbinding.BindingGroup();

jPanel1 = new javax.swing.JPanel();
btseis = new javax.swing.JButton();
bttres = new javax.swing.JButton();
btsete = new javax.swing.JButton();
btponto = new javax.swing.JButton();
btquatro = new javax.swing.JButton();
btdividir = new javax.swing.JButton();
btum = new javax.swing.JButton();
btmultiplicar = new javax.swing.JButton();
btc = new javax.swing.JButton();
btsubtrair = new javax.swing.JButton();
btoito = new javax.swing.JButton();
btsomar = new javax.swing.JButton();
btcinco = new javax.swing.JButton();
btigual = new javax.swing.JButton();
btdois = new javax.swing.JButton();
btraizquadrada = new javax.swing.JButton();
btzero = new javax.swing.JButton();
btnove = new javax.swing.JButton();
lbTela = new javax.swing.JLabel();
btBackspace = new javax.swing.JButton();
lbTemp = new javax.swing.JLabel();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setBackground(new java.awt.Color(0, 153, 204));

jPanel1.setBackground(new java.awt.Color(204, 204, 255));
jPanel1.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
jPanel1.setForeground(new java.awt.Color(0, 204, 204));
jPanel1.setToolTipText("Calculadora");
jPanel1.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyPressed(java.awt.event.KeyEvent evt) {
jPanel1KeyPressed(evt);
}
});

btseis.setFont(new java.awt.Font("Times New Roman", 1, 14)); // NOI18N
btseis.setText("6");
btseis.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btseisActionPerformed(evt);
}
});

bttres.setFont(new java.awt.Font("Times New Roman", 1, 14)); // NOI18N
bttres.setText("3");
bttres.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
bttresActionPerformed(evt);
}
});

btsete.setFont(new java.awt.Font("Times New Roman", 1, 14)); // NOI18N
btsete.setText("7");
btsete.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btseteActionPerformed(evt);
}
});

btponto.setFont(new java.awt.Font("Times New Roman", 1, 14)); // NOI18N
btponto.setText(".");
btponto.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btpontoActionPerformed(evt);
}
});

btquatro.setFont(new java.awt.Font("Times New Roman", 1, 14)); // NOI18N
btquatro.setText("4");
btquatro.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btquatroActionPerformed(evt);
}
});

btdividir.setFont(new java.awt.Font("Times New Roman", 1, 14)); // NOI18N
btdividir.setText("/");
btdividir.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btdividirActionPerformed(evt);
}
});

btum.setFont(new java.awt.Font("Times New Roman", 1, 14)); // NOI18N
btum.setText("1");
btum.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btumActionPerformed(evt);
}
});

btmultiplicar.setFont(new java.awt.Font("Times New Roman", 1, 14)); // NOI18N
btmultiplicar.setText("X");
btmultiplicar.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btmultiplicarActionPerformed(evt);
}
});

btc.setFont(new java.awt.Font("Times New Roman", 1, 10)); // NOI18N
btc.setText("C");
btc.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btcActionPerformed(evt);
}
});

btsubtrair.setFont(new java.awt.Font("Times New Roman", 1, 14)); // NOI18N
btsubtrair.setText("-");
btsubtrair.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btsubtrairActionPerformed(evt);
}
});

btoito.setFont(new java.awt.Font("Times New Roman", 1, 14)); // NOI18N
btoito.setText("8");
btoito.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btoitoActionPerformed(evt);
}
});

btsomar.setFont(new java.awt.Font("Times New Roman", 1, 24)); // NOI18N
btsomar.setText("+");
btsomar.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btsomarActionPerformed(evt);
}
});

btcinco.setFont(new java.awt.Font("Times New Roman", 1, 14)); // NOI18N
btcinco.setText("5");
btcinco.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btcincoActionPerformed(evt);
}
});

btigual.setFont(new java.awt.Font("Times New Roman", 1, 24)); // NOI18N
btigual.setText("=");
btigual.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btigualActionPerformed(evt);
}
});

btdois.setFont(new java.awt.Font("Times New Roman", 1, 14)); // NOI18N
btdois.setText("2");
btdois.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btdoisActionPerformed(evt);
}
});

btraizquadrada.setFont(new java.awt.Font("Times New Roman", 1, 14)); // NOI18N
btraizquadrada.setText("√");
btraizquadrada.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btraizquadradaActionPerformed(evt);
}
});

btzero.setFont(new java.awt.Font("Times New Roman", 1, 14)); // NOI18N
btzero.setText("0");
btzero.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btzeroActionPerformed(evt);
}
});

btnove.setFont(new java.awt.Font("Times New Roman", 1, 14)); // NOI18N
btnove.setText("9");
btnove.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnoveActionPerformed(evt);
}
});

lbTela.setFont(new java.awt.Font("Tahoma", 0, 24)); // NOI18N
lbTela.setBorder(javax.swing.BorderFactory.createTitledBorder(""));
lbTela.setHorizontalTextPosition(javax.swing.SwingConstants.RIGHT);

org.jdesktop.beansbinding.Binding binding = org.jdesktop.beansbinding.Bindings.createAutoBinding(org.jdesktop.beansbinding.AutoBinding.UpdateStrategy.READ_WRITE, btc, org.jdesktop.beansbinding.ELProperty.create("${horizontalAlignment}"), lbTela, org.jdesktop.beansbinding.BeanProperty.create("horizontalAlignment"));
bindingGroup.addBinding(binding);

btBackspace.setText("BackSpace");
btBackspace.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btBackspaceActionPerformed(evt);
}
});

lbTemp.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);

javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(45, 45, 45)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(lbTela, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, jPanel1Layout.createSequentialGroup()
.addComponent(btquatro)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(btcinco))
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, jPanel1Layout.createSequentialGroup()
.addComponent(btsete)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(btoito))
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, jPanel1Layout.createSequentialGroup()
.addComponent(btum)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(btdois))
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(btc)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(btzero)))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(bttres)
.addComponent(btseis))
.addComponent(btponto)
.addComponent(btnove, javax.swing.GroupLayout.Alignment.LEADING)))
.addComponent(btBackspace, javax.swing.GroupLayout.PREFERRED_SIZE, 129, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(btigual, javax.swing.GroupLayout.PREFERRED_SIZE, 108, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(btsubtrair, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(btmultiplicar, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(btdividir, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(btraizquadrada, javax.swing.GroupLayout.PREFERRED_SIZE, 51, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(btsomar, javax.swing.GroupLayout.PREFERRED_SIZE, 51, javax.swing.GroupLayout.PREFERRED_SIZE))))))
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(32, 32, 32)
.addComponent(lbTemp, javax.swing.GroupLayout.PREFERRED_SIZE, 279, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addContainerGap(25, Short.MAX_VALUE))
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(61, 61, 61)
.addComponent(lbTemp, javax.swing.GroupLayout.PREFERRED_SIZE, 36, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(lbTela, javax.swing.GroupLayout.PREFERRED_SIZE, 51, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(btdividir)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(btmultiplicar)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(btsubtrair, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(btraizquadrada, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(btoito)
.addComponent(btsete)
.addComponent(btnove))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(btseis)
.addComponent(btcinco)
.addComponent(btquatro))
.addGap(7, 7, 7)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(btum)
.addComponent(bttres)
.addComponent(btdois))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(btc, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(btzero, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(btponto, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addComponent(btsomar, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(btigual, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(btBackspace, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addContainerGap())
);

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGap(0, 3, Short.MAX_VALUE)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
);

jPanel1.getAccessibleContext().setAccessibleName("Calculadora");

bindingGroup.bind();

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

private void btumActionPerformed(java.awt.event.ActionEvent evt) {
setarNumerosNoLbTela('1');
}

private void btdoisActionPerformed(java.awt.event.ActionEvent evt) {
setarNumerosNoLbTela('2');
}

private void bttresActionPerformed(java.awt.event.ActionEvent evt) {
setarNumerosNoLbTela('3');
}

private void btquatroActionPerformed(java.awt.event.ActionEvent evt) {
setarNumerosNoLbTela('4');
}

private void btcincoActionPerformed(java.awt.event.ActionEvent evt) {
setarNumerosNoLbTela('5');
}

private void btseisActionPerformed(java.awt.event.ActionEvent evt) {
setarNumerosNoLbTela('6');
}

private void btseteActionPerformed(java.awt.event.ActionEvent evt) {
setarNumerosNoLbTela('7');
}

private void btoitoActionPerformed(java.awt.event.ActionEvent evt) {
setarNumerosNoLbTela('8');
}

private void btnoveActionPerformed(java.awt.event.ActionEvent evt) {
setarNumerosNoLbTela('9');
}

private void btzeroActionPerformed(java.awt.event.ActionEvent evt) {
setarNumerosNoLbTela('0');
}

private void btpontoActionPerformed(java.awt.event.ActionEvent evt) {
setarNumerosNoLbTela('.');
}

private void btsomarActionPerformed(java.awt.event.ActionEvent evt) {
pegarNum1();

operacao = '+';
setarValoresLbTemp();
}

private void btdividirActionPerformed(java.awt.event.ActionEvent evt) {
pegarNum1();

operacao = '/';
setarValoresLbTemp();
}

private void btsubtrairActionPerformed(java.awt.event.ActionEvent evt) {
pegarNum1();

operacao = '-';
setarValoresLbTemp();
}

private void btmultiplicarActionPerformed(java.awt.event.ActionEvent evt) {
pegarNum1();

operacao = '*';
setarValoresLbTemp();
}

private void btigualActionPerformed(java.awt.event.ActionEvent evt) {
pegarNum2();
calcular();
lbTemp.setText(lbTemp.getText() + " " + num2);
}

private void btcActionPerformed(java.awt.event.ActionEvent evt) {
reiniciarCalculadora();
jPanel1.requestFocus();
}

private void btBackspaceActionPerformed(java.awt.event.ActionEvent evt) {
backspace();
}

private void btraizquadradaActionPerformed(java.awt.event.ActionEvent evt) {
pegarNum1();

operacao = '√';
calcular();
setarValoresLbTemp();
}

private void jPanel1KeyPressed(java.awt.event.KeyEvent evt) {
if (evt.getKeyChar() == '0'
|| evt.getKeyChar() == '1'
|| evt.getKeyChar() == '2'
|| evt.getKeyChar() == '3'
|| evt.getKeyChar() == '4'
|| evt.getKeyChar() == '5'
|| evt.getKeyChar() == '6'
|| evt.getKeyChar() == '7'
|| evt.getKeyChar() == '8'
|| evt.getKeyChar() == '9') {
setarNumerosNoLbTela(evt.getKeyChar());
}
else if (evt.getKeyChar() == '-'
||evt.getKeyChar() == '+'
||evt.getKeyChar() == '/'
||evt.getKeyChar() == '*' )
{
pegarNum1();

operacao = evt.getKeyChar();
setarValoresLbTemp();
{
else if(evt.getKeyCode()==10){
pegarNum2();
calcular();
lbTemp.setText(lbTemp.getText() + " " + num2);
} else if(evt.getKeyCode()==8);
{
backspace();
}

/**
* @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(CalculadoraJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(CalculadoraJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(CalculadoraJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(CalculadoraJFrame.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 CalculadoraJFrame().setVisible(true);
}
});
}

// Variables declaration - do not modify
private javax.swing.JButton btBackspace;
private javax.swing.JButton btc;
private javax.swing.JButton btcinco;
private javax.swing.JButton btdividir;
private javax.swing.JButton btdois;
private javax.swing.JButton btigual;
private javax.swing.JButton btmultiplicar;
private javax.swing.JButton btnove;
private javax.swing.JButton btoito;
private javax.swing.JButton btponto;
private javax.swing.JButton btquatro;
private javax.swing.JButton btraizquadrada;
private javax.swing.JButton btseis;
private javax.swing.JButton btsete;
private javax.swing.JButton btsomar;
private javax.swing.JButton btsubtrair;
private javax.swing.JButton bttres;
private javax.swing.JButton btum;
private javax.swing.JButton btzero;
private javax.swing.JPanel jPanel1;
private javax.swing.JLabel lbTela;
private javax.swing.JLabel lbTemp;
private org.jdesktop.beansbinding.BindingGroup bindingGroup;
// End of variables declaration

public void setarNumerosNoLbTela(char numero) {
if ("0".equals(lbTela.getText()) && !".".equals(String.valueOf(numero))) {
lbTela.setText("");
}
String texto = lbTela.getText();

if (texto.length() <= 15) {
texto = texto + numero;
lbTela.setText(texto);

jPanel1.requestFocus();
}

}

public void pegarNum1() {
num1 = Double.parseDouble(lbTela.getText());
lbTela.setText("0");
jPanel1.requestFocus();
}

public void pegarNum2() {
num2 = Double.parseDouble(lbTela.getText());
lbTela.setText("");
}

public void calcular() {
if (num2 == 0 && operacao == '/') {
JOptionPane.showMessageDialog(null, "Operação Inválida!");
reiniciarCalculadora();
} else {
if (operacao == '+') {
resultado = num1 + num2;
} else if (operacao == '/') {
resultado = num1 / num2;
} else if (operacao == '-') {
resultado = num1 - num2;
} else if (operacao == '*') {
resultado = num1 * num2;
} else {
resultado = Math.sqrt(num1);
}
lbTela.setText(String.valueOf(resultado));
jPanel1.requestFocus();
}
}

public void setarValoresLbTemp() {
lbTemp.setText(num1 + " " + operacao);
}

public void reiniciarCalculadora() {
num1 = 0;
num2 = 0;
resultado = 0;
lbTela.setText("0");
lbTemp.setText("");
}

/**
*
*/
public void backspace() {
String valor_do_lbTela = lbTela.getText();

if (valor_do_lbTela.length() > 1) {
if (".".equals(valor_do_lbTela.substring(valor_do_lbTela.length() - 2, valor_do_lbTela.length() - 1))) {
valor_do_lbTela = valor_do_lbTela.substring(0, valor_do_lbTela.length() - 2);
} else {
valor_do_lbTela = valor_do_lbTela.substring(0, valor_do_lbTela.length() - 1);
}

lbTela.setText(valor_do_lbTela);

if (valor_do_lbTela.length() == 0) {
lbTela.setText("0");
}
} else {
lbTela.setText("0");
}

jPanel1.requestFocus();
}
public void limitarCaracteres(){

}
}