Terminei um projeto calculadora tudo funcionando corretamente mas me restou uma dúvida, para mim efetuar a conta eu preciso clicar com o mouse qual método que preciso fazer para captar pelo numero lock do meu teclado ja ouvi em algo como System.in mas n sei direito como funciona isso algueim pode me da uma ajuda ? vlw :shock:
Dúvida com calculadora
13 Respostas
HÃ ??? Escreva com calma, parece que você corria da polícia quando escreveu este tópico
Você fez a calculadora usando interface gráfica? Se sim, você deve usar isso aqui:
http://www.guj.com.br/posts/list/47289.java#258583
Aliás, antes de perguntar, procure usar a busca do fórum. O tema “calculadora” já deve ter sido criado milhares de vocês por aqui.
Ah sim, e pontuação ajuda MUITO quem lê o seu texto.
não entendi exatamente o que vc quer.
Mais tem um evento chamado onKeyPress. Tente usar ele pode resolver o seu problema
mal povo sou novo aqui no forum estou ainda me adaptando as regras, o que eu quis dizer acima foi.
Criei um projeto feito em netbeans, ele funciona corretamente porem para mim efetuar o calculo preciso clicar com o mouse no numero ex: 6x7 preciso clicar no 6 no x e no 7 e clicar em somar para dar o resultado, gostaria de saber de algum método que eu possa incrementar para invez de ter que clicar no 6 na multiplicacao e no botao 7 eu apenas aperta-se o 6 , * e o 7 do meu numero lock (TECLADO de números)! e desculpa pela má expressão.
vc terá que implementar um keyListener e ai no metodo keypressed vc faz esse tratamento que vc quer, tipo no construtor da sua classe faça isso:
public teclado() {
this.addKeyListener(new KeyListener() {
public void keyPressed(KeyEvent e) {
if(e.getKeyCode() == e.VK_B){
JOptionPane.showMessageDialog(null, "ksdgfjksd");
}
}
public void keyReleased(KeyEvent e) {
}
public void keyTyped(KeyEvent e) {
}
});
}
nesse exemplo qdo dor apertado a tecla B ele vai dar uma mensagem.
fis isso e ta o texto public teclado() { ta sublinhado com o seguinte erro -> invalid method declaration, return type required.
Coloca:
public void teclado() {
Negativo, incrementei esse código ae com void e nada abro o projeto aperto o botao B e n aparece mensagem alguma! é esse mesmo o código? posso estar fazendo algo errado?
Tu colocou a chama ao método teclado() em algum lugar??
Coloca o código aí pra nós termos uma idéia… só não precisa colocar todo o intiCompnents… hehehehe
Você deve colocar o listener de evento de teclado no formulário
ficou assim
public class TelaCalculadora extends javax.swing.JFrame {
package telas;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.text.NumberFormat;
import java.util.Locale;
import javax.swing.JOptionPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
/**
*
* @author kenshin
*/
public class TelaCalculadora extends javax.swing.JFrame {
/** Creates new form TelaCalculadora */
public TelaCalculadora() {
initComponents();
temas = UIManager.getInstalledLookAndFeels();
for (int i=0; i < temas.length; i++) {
cbTemas.addItem(temas[i].getName());
}
}
/** 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() {
txVisor = new javax.swing.JTextField();
brBack = new javax.swing.JButton();
brClear = new javax.swing.JButton();
btBarra = new javax.swing.JButton();
bt_Nove = new javax.swing.JButton();
brOito = new javax.swing.JButton();
brSete = new javax.swing.JButton();
btMultiplicacao = new javax.swing.JButton();
btSeis = new javax.swing.JButton();
btCinco = new javax.swing.JButton();
brQuatro = new javax.swing.JButton();
btUm = new javax.swing.JButton();
btDois = new javax.swing.JButton();
btTres = new javax.swing.JButton();
btSubtracao = new javax.swing.JButton();
btZero = new javax.swing.JButton();
btVirgula = new javax.swing.JButton();
btResultado = new javax.swing.JButton();
btSoma = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
cbTemas = new javax.swing.JComboBox();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Calculadora Java");
setResizable(false);
txVisor.setBackground(new java.awt.Color(102, 255, 102));
txVisor.setFont(new java.awt.Font("Tahoma", 0, 24));
txVisor.setHorizontalAlignment(javax.swing.JTextField.RIGHT);
txVisor.setText("0");
txVisor.setToolTipText("Visor da Calculadora");
brBack.setFont(new java.awt.Font("Comic Sans MS", 1, 11));
brBack.setText("BackSpace");
brBack.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
brBackActionPerformed(evt);
}
});
brClear.setFont(new java.awt.Font("Comic Sans MS", 1, 11));
brClear.setText("Clear");
brClear.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
brClearActionPerformed(evt);
}
});
btBarra.setFont(new java.awt.Font("Tahoma", 1, 11));
btBarra.setForeground(new java.awt.Color(204, 0, 51));
btBarra.setText("/");
btBarra.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btBarraActionPerformed(evt);
}
});
bt_Nove.setFont(new java.awt.Font("Tahoma", 1, 11));
bt_Nove.setForeground(new java.awt.Color(0, 153, 255));
bt_Nove.setText("9");
bt_Nove.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
bt_NoveActionPerformed(evt);
}
});
brOito.setFont(new java.awt.Font("Tahoma", 1, 11));
brOito.setForeground(new java.awt.Color(0, 153, 255));
brOito.setText("8");
brOito.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
brOitoActionPerformed(evt);
}
});
brSete.setFont(new java.awt.Font("Tahoma", 1, 11));
brSete.setForeground(new java.awt.Color(0, 153, 255));
brSete.setText("7");
brSete.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
brSeteActionPerformed(evt);
}
});
btMultiplicacao.setFont(new java.awt.Font("Tahoma", 1, 11));
btMultiplicacao.setForeground(new java.awt.Color(255, 0, 51));
btMultiplicacao.setText("*");
btMultiplicacao.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btMultiplicacaoActionPerformed(evt);
}
});
btSeis.setFont(new java.awt.Font("Tahoma", 1, 11));
btSeis.setForeground(new java.awt.Color(0, 153, 255));
btSeis.setText("6");
btSeis.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btSeisActionPerformed(evt);
}
});
btCinco.setFont(new java.awt.Font("Tahoma", 1, 11));
btCinco.setForeground(new java.awt.Color(0, 153, 255));
btCinco.setText("5");
btCinco.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btCincoActionPerformed(evt);
}
});
brQuatro.setFont(new java.awt.Font("Tahoma", 1, 11));
brQuatro.setForeground(new java.awt.Color(0, 153, 255));
brQuatro.setText("4");
brQuatro.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
brQuatroActionPerformed(evt);
}
});
btUm.setFont(new java.awt.Font("Tahoma", 1, 11));
btUm.setForeground(new java.awt.Color(0, 153, 255));
btUm.setText("1");
btUm.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btUmActionPerformed(evt);
}
});
btDois.setFont(new java.awt.Font("Tahoma", 1, 11));
btDois.setForeground(new java.awt.Color(0, 153, 255));
btDois.setText("2");
btDois.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btDoisActionPerformed(evt);
}
});
btTres.setFont(new java.awt.Font("Tahoma", 1, 11));
btTres.setForeground(new java.awt.Color(0, 153, 255));
btTres.setText("3");
btTres.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btTresActionPerformed(evt);
}
});
btSubtracao.setFont(new java.awt.Font("Tahoma", 1, 11));
btSubtracao.setForeground(new java.awt.Color(255, 0, 51));
btSubtracao.setText("-");
btSubtracao.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btSubtracaoActionPerformed(evt);
}
});
btZero.setFont(new java.awt.Font("Tahoma", 1, 11));
btZero.setForeground(new java.awt.Color(0, 153, 255));
btZero.setText("0");
btZero.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btZeroActionPerformed(evt);
}
});
btVirgula.setFont(new java.awt.Font("Tahoma", 1, 11));
btVirgula.setForeground(new java.awt.Color(255, 102, 51));
btVirgula.setText(",");
btVirgula.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btVirgulaActionPerformed(evt);
}
});
btResultado.setFont(new java.awt.Font("Tahoma", 1, 11));
btResultado.setForeground(new java.awt.Color(255, 0, 51));
btResultado.setText("=");
btResultado.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btResultadoActionPerformed(evt);
}
});
btSoma.setFont(new java.awt.Font("Tahoma", 1, 11));
btSoma.setForeground(new java.awt.Color(255, 0, 51));
btSoma.setText("+");
btSoma.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btSomaActionPerformed(evt);
}
});
jLabel1.setFont(new java.awt.Font("Comic Sans MS", 1, 11));
jLabel1.setText("Temas");
cbTemas.addItemListener(new java.awt.event.ItemListener() {
public void itemStateChanged(java.awt.event.ItemEvent evt) {
cbTemasItemStateChanged(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()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(txVisor, javax.swing.GroupLayout.DEFAULT_SIZE, 390, Short.MAX_VALUE)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(brSete, javax.swing.GroupLayout.DEFAULT_SIZE, 102, Short.MAX_VALUE)
.addComponent(btZero, javax.swing.GroupLayout.DEFAULT_SIZE, 102, Short.MAX_VALUE)
.addComponent(btUm, javax.swing.GroupLayout.DEFAULT_SIZE, 102, Short.MAX_VALUE)
.addComponent(brQuatro, javax.swing.GroupLayout.Alignment.TRAILING, 0, 0, Short.MAX_VALUE))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(brOito, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 87, Short.MAX_VALUE)
.addComponent(btCinco, javax.swing.GroupLayout.DEFAULT_SIZE, 87, Short.MAX_VALUE)
.addComponent(btVirgula, 0, 0, Short.MAX_VALUE)
.addComponent(btDois, javax.swing.GroupLayout.DEFAULT_SIZE, 87, Short.MAX_VALUE))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(brBack)
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(bt_Nove, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 86, Short.MAX_VALUE)
.addGroup(layout.createSequentialGroup()
.addComponent(btSeis, javax.swing.GroupLayout.DEFAULT_SIZE, 86, Short.MAX_VALUE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED))
.addComponent(btTres, 0, 0, Short.MAX_VALUE)
.addComponent(btResultado, javax.swing.GroupLayout.DEFAULT_SIZE, 86, Short.MAX_VALUE))))
.addGap(12, 12, 12)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(btSoma, 0, 0, Short.MAX_VALUE)
.addComponent(btSubtracao, 0, 0, Short.MAX_VALUE)
.addComponent(brClear, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(btBarra, 0, 0, Short.MAX_VALUE)
.addComponent(btMultiplicacao, javax.swing.GroupLayout.DEFAULT_SIZE, 67, Short.MAX_VALUE)))
.addGroup(layout.createSequentialGroup()
.addComponent(cbTemas, javax.swing.GroupLayout.PREFERRED_SIZE, 162, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)))))
.addContainerGap())
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 53, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(159, 159, 159))))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(txVisor, javax.swing.GroupLayout.PREFERRED_SIZE, 54, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(brClear, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(brBack, javax.swing.GroupLayout.DEFAULT_SIZE, 38, Short.MAX_VALUE))
.addGap(26, 26, 26)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(bt_Nove, javax.swing.GroupLayout.DEFAULT_SIZE, 38, Short.MAX_VALUE)
.addComponent(btBarra, javax.swing.GroupLayout.DEFAULT_SIZE, 38, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(brSete, javax.swing.GroupLayout.DEFAULT_SIZE, 38, Short.MAX_VALUE)
.addComponent(brOito, javax.swing.GroupLayout.DEFAULT_SIZE, 38, Short.MAX_VALUE)))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(btMultiplicacao, javax.swing.GroupLayout.DEFAULT_SIZE, 29, Short.MAX_VALUE)
.addComponent(brQuatro, javax.swing.GroupLayout.DEFAULT_SIZE, 29, Short.MAX_VALUE)
.addComponent(btCinco, javax.swing.GroupLayout.DEFAULT_SIZE, 29, Short.MAX_VALUE)
.addComponent(btSeis, javax.swing.GroupLayout.DEFAULT_SIZE, 29, Short.MAX_VALUE))
.addGap(30, 30, 30)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(btSubtracao, javax.swing.GroupLayout.DEFAULT_SIZE, 29, Short.MAX_VALUE)
.addComponent(btDois, javax.swing.GroupLayout.DEFAULT_SIZE, 29, Short.MAX_VALUE)
.addComponent(btTres, javax.swing.GroupLayout.DEFAULT_SIZE, 29, Short.MAX_VALUE)
.addComponent(btUm, javax.swing.GroupLayout.DEFAULT_SIZE, 29, Short.MAX_VALUE))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(btResultado, javax.swing.GroupLayout.DEFAULT_SIZE, 37, Short.MAX_VALUE)
.addComponent(btSoma, javax.swing.GroupLayout.DEFAULT_SIZE, 37, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(btVirgula, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(btZero, javax.swing.GroupLayout.DEFAULT_SIZE, 37, Short.MAX_VALUE)))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jLabel1)
.addGap(1, 1, 1)
.addComponent(cbTemas, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
);
pack();
}// </editor-fold>
private void brSeteActionPerformed(java.awt.event.ActionEvent evt) {
if (txVisor.getText().equals("0")) {
txVisor.setText("7");
}
else {
txVisor.setText(txVisor.getText() + "7");
}
}
private void brOitoActionPerformed(java.awt.event.ActionEvent evt) {
if (txVisor.getText().equals("0")) {
txVisor.setText("8");
}
else {
txVisor.setText(txVisor.getText() + "8");
}
}
private void bt_NoveActionPerformed(java.awt.event.ActionEvent evt) {
if (txVisor.getText().equals("0")) {
txVisor.setText("9");
}
else {
txVisor.setText(txVisor.getText() + "9");
}
}
private void brQuatroActionPerformed(java.awt.event.ActionEvent evt) {
if (txVisor.getText().equals("0")) {
txVisor.setText("4");
}
else {
txVisor.setText(txVisor.getText() + "4");
}
}
private void btCincoActionPerformed(java.awt.event.ActionEvent evt) {
if (txVisor.getText().equals("0")) {
txVisor.setText("5");
}
else {
txVisor.setText(txVisor.getText() + "5");
}
}
private void btSeisActionPerformed(java.awt.event.ActionEvent evt) {
if (txVisor.getText().equals("0")) {
txVisor.setText("6");
}
else {
txVisor.setText(txVisor.getText() + "6");
}
}
private void btUmActionPerformed(java.awt.event.ActionEvent evt) {
if (txVisor.getText().equals("0")) {
txVisor.setText("1");
}
else {
txVisor.setText(txVisor.getText() + "1");
}
}
private void btDoisActionPerformed(java.awt.event.ActionEvent evt) {
if (txVisor.getText().equals("0")) {
txVisor.setText("2");
}
else {
txVisor.setText(txVisor.getText() + "2");
}
}
private void btTresActionPerformed(java.awt.event.ActionEvent evt) {
if (txVisor.getText().equals("0")) {
txVisor.setText("3");
}
else {
txVisor.setText(txVisor.getText() + "3");
}
}
private void btZeroActionPerformed(java.awt.event.ActionEvent evt) {
if (txVisor.getText().equals("0")) {
txVisor.setText("0");
}
else {
txVisor.setText(txVisor.getText() + "0");
}
}
private void brBackActionPerformed(java.awt.event.ActionEvent evt) {
String valor = txVisor.getText();
if ( (!valor.equals("0")) && (!valor.equals("")) ) {
valor = valor.substring(0, valor.length()-1);
if (valor.equals("")) {
txVisor.setText("0");
}
else {
txVisor.setText(valor);
}
}
}
private void brClearActionPerformed(java.awt.event.ActionEvent evt) {
txVisor.setText("0");
visor = 0;
operacao = "";
}
private void btVirgulaActionPerformed(java.awt.event.ActionEvent evt) {
if (txVisor.getText().indexOf(",") == -1) {
txVisor.setText(txVisor.getText() + ",");
}
}
private void btSomaActionPerformed(java.awt.event.ActionEvent evt) {
if (visor==0) {
visor = Double.parseDouble(txVisor.getText().replace(",","."));
}
else {
visor = visor + Double.parseDouble(txVisor.getText().replace(",","."));
}
operacao = "soma";
txVisor.setText("0");
}
private void btSubtracaoActionPerformed(java.awt.event.ActionEvent evt) {
if (visor==0) {
visor = Double.parseDouble(txVisor.getText().replace(",","."));
}
else {
visor = visor - Double.parseDouble(txVisor.getText().replace(",","."));
}
operacao = "subtracao";
txVisor.setText("0");
}
private void btBarraActionPerformed(java.awt.event.ActionEvent evt) {
if (!txVisor.getText().equals("0")) {
if (visor==0) {
visor = Double.parseDouble(txVisor.getText().replace(",","."));
}
else {
visor = visor / Double.parseDouble(txVisor.getText().replace(",","."));
}
operacao = "divisao";
txVisor.setText("0");
}
}
private void btMultiplicacaoActionPerformed(java.awt.event.ActionEvent evt) {
if (visor==0) {
visor = Double.parseDouble(txVisor.getText().replace(",","."));
}
else {
visor = visor * Double.parseDouble(txVisor.getText().replace(",","."));
}
operacao = "multiplicacao";
txVisor.setText("0");
}
private void btResultadoActionPerformed(java.awt.event.ActionEvent evt) {
if (!txVisor.getText().equals("0")) {
if (operacao.equals("soma")) {
visor = visor + Double.parseDouble(txVisor.getText().replace(",","."));
}
else if (operacao.equals("subtracao")) {
visor = visor - Double.parseDouble(txVisor.getText().replace(",","."));
}
else if (operacao.equals("multiplicacao")) {
visor = visor * Double.parseDouble(txVisor.getText().replace(",","."));
}
else if (operacao.equals("divisao")) {
visor = visor / Double.parseDouble(txVisor.getText().replace(",","."));
}
}
NumberFormat nf = NumberFormat .getInstance(new Locale("pt","BR"));
nf.setMinimumFractionDigits(0);
txVisor.setText(nf.format(visor));
visor = 0;
operacao = "";
}
private void cbTemasItemStateChanged(java.awt.event.ItemEvent evt) {
try {
UIManager.setLookAndFeel(temas[cbTemas.getSelectedIndex()].getClassName());
SwingUtilities.updateComponentTreeUI(this);
}
catch (Exception e) {
JOptionPane.showMessageDialog(null,"Ocorreu um erro na aplicação do tema!");
}
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new TelaCalculadora().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton brBack;
private javax.swing.JButton brClear;
private javax.swing.JButton brOito;
private javax.swing.JButton brQuatro;
private javax.swing.JButton brSete;
private javax.swing.JButton btBarra;
private javax.swing.JButton btCinco;
private javax.swing.JButton btDois;
private javax.swing.JButton btMultiplicacao;
private javax.swing.JButton btResultado;
private javax.swing.JButton btSeis;
private javax.swing.JButton btSoma;
private javax.swing.JButton btSubtracao;
private javax.swing.JButton btTres;
private javax.swing.JButton btUm;
private javax.swing.JButton btVirgula;
private javax.swing.JButton btZero;
private javax.swing.JButton bt_Nove;
private javax.swing.JComboBox cbTemas;
private javax.swing.JLabel jLabel1;
private javax.swing.JTextField txVisor;
// End of variables declaration
private double visor = 0;
private String operacao = "";
private UIManager.LookAndFeelInfo temas[];
public void teclado() {
this.addKeyListener(new KeyListener() {
public void keyPressed(KeyEvent e) {
if(e.getKeyCode() == e.VK_B){
JOptionPane.showMessageDialog(null, "ksdgfjksd");
}
}
public void keyReleased(KeyEvent e) {
}
public void keyTyped(KeyEvent e) {
}
});
}
}
ta ae
ta ae o codigo pessoal nao consigo capturar os numeros do meu num pad na minha calculadora, ele so faz a operacao se eu clica nos numeros.
Criado 20 de novembro de 2008
Ultima resposta 28 de nov. de 2008
Respostas 13
Participantes 6
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