Calculadora

Publicado por Rodrigo Zanuzzo (ķltima atualizaÁ„o em 25/11/2009)

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Homepage: @rodrigozanuzzo

Download Calculadora.jar




Este é o projeto de uma calculadora feita em Java no IDE Netbeans.

Gostaria que dessem uma olhada e identificassem possíveis erros ou dessem alguma dica para melhorar o meu projeto.

Desde já agradeço a todos.

  



Esconder cůdigo-fonte

public class calculadora extends javax.swing.JFrame {
String tela,op;
double res,por,raiz,m,v1,v2;

††††public calculadora() {
††††††††initComponents();
††††}
††††@SuppressWarnings("unchecked")
††††// <editor-fold defaultstate="collapsed" desc="Generated Code">
††††private void initComponents() {

††††††††jPanel1 = new javax.swing.JPanel();
††††††††tfExibe = new javax.swing.JTextField();
††††††††b9 = new javax.swing.JButton();
††††††††bOff = new javax.swing.JButton();
††††††††bCe = new javax.swing.JButton();
††††††††bSqrt = new javax.swing.JButton();
††††††††bDiv = new javax.swing.JButton();
††††††††bMult = new javax.swing.JButton();
††††††††bSub = new javax.swing.JButton();
††††††††bAdi = new javax.swing.JButton();
††††††††bIgual = new javax.swing.JButton();
††††††††b0 = new javax.swing.JButton();
††††††††bPor = new javax.swing.JButton();
††††††††bOn = new javax.swing.JButton();
††††††††bMr = new javax.swing.JButton();
††††††††bMais = new javax.swing.JButton();
††††††††bMenos = new javax.swing.JButton();
††††††††b1 = new javax.swing.JButton();
††††††††b2 = new javax.swing.JButton();
††††††††b3 = new javax.swing.JButton();
††††††††b6 = new javax.swing.JButton();
††††††††b5 = new javax.swing.JButton();
††††††††b4 = new javax.swing.JButton();
††††††††b7 = new javax.swing.JButton();
††††††††b8 = new javax.swing.JButton();

††††††††setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
††††††††setTitle("Calculadora");
††††††††setResizable(false);

††††††††jPanel1.setLayout(null);
††††††††jPanel1.add(tfExibe);
††††††††tfExibe.setBounds(10, 10, 320, 23);

††††††††b9.setText("9");
††††††††b9.setEnabled(false);
††††††††b9.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††b9ActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(b9);
††††††††b9.setBounds(220, 80, 50, 27);

††††††††bOff.setMnemonic('f');
††††††††bOff.setText("OFF");
††††††††bOff.setEnabled(false);
††††††††bOff.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††bOffActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(bOff);
††††††††bOff.setBounds(90, 50, 70, 27);

††††††††bCe.setMnemonic('c');
††††††††bCe.setText("CE");
††††††††bCe.setEnabled(false);
††††††††bCe.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††bCeActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(bCe);
††††††††bCe.setBounds(160, 50, 60, 27);

††††††††bSqrt.setMnemonic('s');
††††††††bSqrt.setText("SQRT");
††††††††bSqrt.setEnabled(false);
††††††††bSqrt.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††bSqrtActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(bSqrt);
††††††††bSqrt.setBounds(20, 200, 120, 30);

††††††††bDiv.setText("/");
††††††††bDiv.setEnabled(false);
††††††††bDiv.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††bDivActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(bDiv);
††††††††bDiv.setBounds(220, 50, 50, 27);

††††††††bMult.setText("X");
††††††††bMult.setEnabled(false);
††††††††bMult.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††bMultActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(bMult);
††††††††bMult.setBounds(280, 50, 50, 27);

††††††††bSub.setText("-");
††††††††bSub.setEnabled(false);
††††††††bSub.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††bSubActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(bSub);
††††††††bSub.setBounds(280, 80, 50, 27);

††††††††bAdi.setText("+");
††††††††bAdi.setEnabled(false);
††††††††bAdi.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††bAdiActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(bAdi);
††††††††bAdi.setBounds(280, 110, 50, 80);

††††††††bIgual.setText("=");
††††††††bIgual.setEnabled(false);
††††††††bIgual.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††bIgualActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(bIgual);
††††††††bIgual.setBounds(280, 200, 50, 30);

††††††††b0.setText("0");
††††††††b0.setEnabled(false);
††††††††b0.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††b0ActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(b0);
††††††††b0.setBounds(210, 200, 50, 30);

††††††††bPor.setText("%");
††††††††bPor.setEnabled(false);
††††††††bPor.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††bPorActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(bPor);
††††††††bPor.setBounds(150, 200, 50, 30);

††††††††bOn.setMnemonic('o');
††††††††bOn.setText("ON");
††††††††bOn.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††bOnActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(bOn);
††††††††bOn.setBounds(20, 50, 70, 27);

††††††††bMr.setMnemonic('m');
††††††††bMr.setText("MR");
††††††††bMr.setEnabled(false);
††††††††bMr.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††bMrActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(bMr);
††††††††bMr.setBounds(20, 80, 70, 27);

††††††††bMais.setText("M+");
††††††††bMais.setEnabled(false);
††††††††bMais.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††bMaisActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(bMais);
††††††††bMais.setBounds(20, 120, 70, 27);

††††††††bMenos.setText("M-");
††††††††bMenos.setEnabled(false);
††††††††bMenos.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††bMenosActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(bMenos);
††††††††bMenos.setBounds(20, 160, 70, 27);

††††††††b1.setText("1");
††††††††b1.setEnabled(false);
††††††††b1.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††b1ActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(b1);
††††††††b1.setBounds(100, 160, 50, 27);

††††††††b2.setText("2");
††††††††b2.setEnabled(false);
††††††††b2.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††b2ActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(b2);
††††††††b2.setBounds(160, 160, 50, 27);

††††††††b3.setText("3");
††††††††b3.setEnabled(false);
††††††††b3.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††b3ActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(b3);
††††††††b3.setBounds(220, 160, 50, 27);

††††††††b6.setText("6");
††††††††b6.setEnabled(false);
††††††††b6.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††b6ActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(b6);
††††††††b6.setBounds(220, 120, 50, 27);

††††††††b5.setText("5");
††††††††b5.setEnabled(false);
††††††††b5.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††b5ActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(b5);
††††††††b5.setBounds(160, 120, 50, 27);

††††††††b4.setText("4");
††††††††b4.setEnabled(false);
††††††††b4.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††b4ActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(b4);
††††††††b4.setBounds(100, 120, 50, 27);

††††††††b7.setText("7");
††††††††b7.setEnabled(false);
††††††††b7.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††b7ActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(b7);
††††††††b7.setBounds(100, 80, 50, 27);

††††††††b8.setText("8");
††††††††b8.setEnabled(false);
††††††††b8.addActionListener(new java.awt.event.ActionListener() {
††††††††††††public void actionPerformed(java.awt.event.ActionEvent evt) {
††††††††††††††††b8ActionPerformed(evt);
††††††††††††}
††††††††});
††††††††jPanel1.add(b8);
††††††††b8.setBounds(160, 80, 50, 27);

††††††††getContentPane().add(jPanel1, java.awt.BorderLayout.CENTER);

††††††††java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
††††††††setBounds((screenSize.width-364)/2, (screenSize.height-276)/2, 364, 276);
††††}// </editor-fold>

private void b0ActionPerformed(java.awt.event.ActionEvent evt) {
if(tela==""){††††††
††††tfExibe.setText(tfExibe.getText()+"0");
}else{††††††††
††††tfExibe.setText(tfExibe.getText()+"0");
}
tela="0";
}

private void b1ActionPerformed(java.awt.event.ActionEvent evt) {
if(tela==""){†† 
††††tfExibe.setText(tfExibe.getText()+"1");
}else{††††
††††tfExibe.setText(tfExibe.getText()+"1");
}
tela="1";
}

private void b2ActionPerformed(java.awt.event.ActionEvent evt) {
if(tela==""){†† 
††††tfExibe.setText(tfExibe.getText()+"2");
}else{††††
††††tfExibe.setText(tfExibe.getText()+"2");
}
tela="2";
}

private void b3ActionPerformed(java.awt.event.ActionEvent evt) {
if(tela==""){†† 
††††tfExibe.setText(tfExibe.getText()+"3");
}else{††††
††††tfExibe.setText(tfExibe.getText()+"3");
}
tela="3";
}

private void b4ActionPerformed(java.awt.event.ActionEvent evt) {
if(tela==""){†† 
††††tfExibe.setText(tfExibe.getText()+"4");
}else{††††
††††tfExibe.setText(tfExibe.getText()+"4");
}
tela="4";
}

private void b5ActionPerformed(java.awt.event.ActionEvent evt) {
if(tela==""){†† 
††††tfExibe.setText(tfExibe.getText()+"5");
}else{††††
††††tfExibe.setText(tfExibe.getText()+"5");
}
tela="5";
}

private void b6ActionPerformed(java.awt.event.ActionEvent evt) {
if(tela==""){†† 
††††tfExibe.setText(tfExibe.getText()+"6");
}else{††††
tfExibe.setText(tfExibe.getText()+"6");
}
tela="6";
}

private void b7ActionPerformed(java.awt.event.ActionEvent evt) {
if(tela==""){†† 
††††tfExibe.setText(tfExibe.getText()+"7");
}else{
††††tfExibe.setText(tfExibe.getText()+"7");
}
tela="7";
}

private void b8ActionPerformed(java.awt.event.ActionEvent evt) {
if(tela==""){†† 
††††tfExibe.setText(tfExibe.getText()+"8");
}else{
††††tfExibe.setText(tfExibe.getText()+"8");
}
tela="8";
}

private void b9ActionPerformed(java.awt.event.ActionEvent evt) {
if(tela==""){†† 
††††tfExibe.setText(tfExibe.getText()+"9");
}else{
††††tfExibe.setText(tfExibe.getText()+"9");
}
tela="9";
}

private void bAdiActionPerformed(java.awt.event.ActionEvent evt) {
if (op=="+"){
††††v2=Double.parseDouble(tfExibe.getText());
††††v1=v1+v2; 
}
††††††††op="+";
v1=Double.parseDouble(tfExibe.getText());
tela="";
tfExibe.setText("");
}

private void bSubActionPerformed(java.awt.event.ActionEvent evt) {
††if (op=="-"){
††††v2=Double.parseDouble(tfExibe.getText());
††††v1=v1-v2;
}
††††††††op="-";
v1=Double.parseDouble(tfExibe.getText());
tela="";
tfExibe.setText("");
}

private void bMultActionPerformed(java.awt.event.ActionEvent evt) {
††if (op=="*"){
††††v2=Double.parseDouble(tfExibe.getText());
††††v1=v1*v2;
}
††††††††op="*";
v1=Double.parseDouble(tfExibe.getText());
tela="";
tfExibe.setText("");
}

private void bDivActionPerformed(java.awt.event.ActionEvent evt) {
††if (op=="/"){
††††v2=Double.parseDouble(tfExibe.getText());
††††v1=v1/v2;
††††
}
††††††††op="/";
v1=Double.parseDouble(tfExibe.getText());
tela="";
tfExibe.setText("");
}

private void bIgualActionPerformed(java.awt.event.ActionEvent evt) {
v2=Double.parseDouble(tfExibe.getText());
if (op=="+"){
††††res=v1+v2;
}
if (op=="-"){
††††res=v1-v2;
}
if (op=="/"){
††††res=v1/v2;
}
if (op=="*"){
††††res=v1*v2;
}
tfExibe.setText(String.valueOf(res));
tela="";
op="";
res=0;
v1=0;
v2=0;
raiz=0;
por=0;
}

private void bCeActionPerformed(java.awt.event.ActionEvent evt) {
tfExibe.setText("");
tela=null;
op=null;
res=0;
por=0;
v1=0;
v2=0;
}

private void bPorActionPerformed(java.awt.event.ActionEvent evt) {
v2=Double.parseDouble(tfExibe.getText());
if (op=="+"){
††††por=v1+((v1*v2)/100);
††}
if (op=="-"){
††††por=v1-((v1*v2)/100);
††}
if (op=="*"){
††††por=(v1*v2)/100;
††}
tfExibe.setText(String.valueOf(por));
tela="";
}

private void bSqrtActionPerformed(java.awt.event.ActionEvent evt) {
raiz=Double.parseDouble(tfExibe.getText());
tfExibe.setText(String.valueOf(Math.sqrt(raiz)));

}

private void bMrActionPerformed(java.awt.event.ActionEvent evt) {
tfExibe.setText(String.valueOf(m));
}

private void bMaisActionPerformed(java.awt.event.ActionEvent evt) {
m=Double.parseDouble(tfExibe.getText());
}

private void bMenosActionPerformed(java.awt.event.ActionEvent evt) {
m=0;
}

private void bOnActionPerformed(java.awt.event.ActionEvent evt) {
b1.setEnabled(true);
b2.setEnabled(true);
b3.setEnabled(true);
b4.setEnabled(true);
b5.setEnabled(true);
b6.setEnabled(true);
b7.setEnabled(true);
b8.setEnabled(true);
b9.setEnabled(true);
b0.setEnabled(true);
bOff.setEnabled(true);
bAdi.setEnabled(true);
bDiv.setEnabled(true);
bMult.setEnabled(true);
bSub.setEnabled(true);
bPor.setEnabled(true);
bSqrt.setEnabled(true);
bCe.setEnabled(true);
bIgual.setEnabled(true);
bMr.setEnabled(true);
bMais.setEnabled(true);
bMenos.setEnabled(true);
bOn.setEnabled(false);
tfExibe.requestFocus();
}

private void bOffActionPerformed(java.awt.event.ActionEvent evt) {
b1.setEnabled(false);
b2.setEnabled(false);
b3.setEnabled(false);
b4.setEnabled(false);
b5.setEnabled(false);
b6.setEnabled(false);
b7.setEnabled(false);
b8.setEnabled(false);
b9.setEnabled(false);
b0.setEnabled(false);
bOff.setEnabled(false);
bAdi.setEnabled(false);
bDiv.setEnabled(false);
bMult.setEnabled(false);
bSub.setEnabled(false);
bPor.setEnabled(false);
bSqrt.setEnabled(false);
bCe.setEnabled(false);
bIgual.setEnabled(false);
bMr.setEnabled(false);
bMais.setEnabled(false);
bMenos.setEnabled(false);
bOn.setEnabled(true);
tfExibe.setText("");
tela=null;
op=null;
res=0;
por=0;
v1=0;
v2=0;
}
††††public static void main(String args[]) {
††††††††java.awt.EventQueue.invokeLater(new Runnable() {
††††††††††††public void run() {
††††††††††††††††new calculadora().setVisible(true);
††††††††††††}
††††††††});
††††}
††††// Variables declaration - do not modify
††††private javax.swing.JButton b0;
††††private javax.swing.JButton b1;
††††private javax.swing.JButton b2;
††††private javax.swing.JButton b3;
††††private javax.swing.JButton b4;
††††private javax.swing.JButton b5;
††††private javax.swing.JButton b6;
††††private javax.swing.JButton b7;
††††private javax.swing.JButton b8;
††††private javax.swing.JButton b9;
††††private javax.swing.JButton bAdi;
††††private javax.swing.JButton bCe;
††††private javax.swing.JButton bDiv;
††††private javax.swing.JButton bIgual;
††††private javax.swing.JButton bMais;
††††private javax.swing.JButton bMenos;
††††private javax.swing.JButton bMr;
††††private javax.swing.JButton bMult;
††††private javax.swing.JButton bOff;
††††private javax.swing.JButton bOn;
††††private javax.swing.JButton bPor;
††††private javax.swing.JButton bSqrt;
††††private javax.swing.JButton bSub;
††††private javax.swing.JPanel jPanel1;
††††private javax.swing.JTextField tfExibe;
††††// End of variables declaration
}

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