Witajcie napisałem prosty kalkulator w javie,ale jest problem wyniki wyświetlają się w postaci np.3.0 jak to naprawić? Prosiłbym o poprawienie tego co jest źle.
public class Kalkulator extends JFrame implements ActionListener {
private JTextArea text = new JTextArea(1, 20);
private JFrame frame = new JFrame("Kalkulator");
private JPanel panel = new JPanel();
private JMenuBar menuBar = new JMenuBar();
private JMenu Program = new JMenu("Program");
private JMenu Edycja = new JMenu("Edycja");
private JMenuItem Zamknij = new JMenuItem("Zamknij");
private JMenuItem Kopiuj = new JMenuItem("Kopiuj");
private JMenuItem Wklej = new JMenuItem("Wklej");
private JButton but1 = new JButton("1");
private JButton but2 = new JButton("2");
private JButton but3 = new JButton("3");
private JButton but4 = new JButton("4");
private JButton but5 = new JButton("5");
private JButton but6 = new JButton("6");
private JButton but7 = new JButton("7");
private JButton but8 = new JButton("8");
private JButton but9 = new JButton("9");
private JButton but0 = new JButton("0");
private JButton dodaj = new JButton("+");
private JButton odejmij = new JButton("-");
private JButton pomnoz = new JButton("*");
private JButton podziel = new JButton("/");
private JButton wynik = new JButton("=");
private JButton czysc = new JButton("C");
Double number1, number2, result;
int dodajc = 0, odejmijc = 0, pomnozc = 0, podzielc = 0;
public void Zamknij() {
System.exit(0);
}
public void but1() {
text.append("1");
}
public void but2() {
text.append("2");
}
public void but3() {
text.append("3");
}
public void but4() {
text.append("4");
}
public void but5() {
text.append("5");
}
public void but6() {
text.append("6");
}
public void but7() {
text.append("7");
}
public void but8() {
text.append("8");
}
public void but9() {
text.append("9");
}
public void but0() {
text.append("0");
}
public void dodaj() {
number1 = number_reader();
text.setText("");
dodajc = 1;
odejmijc = 0;
pomnozc = 0;
podzielc = 0;
}
public void odejmij() {
number1 = number_reader();
text.setText("");
dodajc = 0;
odejmijc = 1;
pomnozc = 0;
podzielc = 0;
}
public void pomnoz() {
number1 = number_reader();
text.setText("");
dodajc = 1;
odejmijc = 0;
pomnozc = 1;
podzielc = 0;
}
public void wynik() {
number2 = number_reader();
if (dodajc > 0) {
result = number1 + number2;
text.setText(Double.toString(result));
}
if (odejmijc > 0) {
result = number1 - number2;
text.setText(Double.toString(result));
}
if (pomnozc > 0) {
result = number1 * number2;
text.setText(Double.toString(result));
}
}
public double number_reader() {
Double num1;
String s;
s = text.getText();
num1 = Double.valueOf(s);
return num1;
}
public Kalkulator() {
this.setSize(new Dimension(240, 230));
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setVisible(true);
this.setTitle("Kalkulator");
this.add(panel, BorderLayout.CENTER);
// this.setIconImage(Toolkit.getDefaultToolkit().getImage(
// getClass().getResource("pobrane.png")))
Zamknij.addActionListener(this);
Kopiuj.addActionListener(this);
Wklej.addActionListener(this);
but1.addActionListener(this);
but2.addActionListener(this);
but3.addActionListener(this);
but4.addActionListener(this);
but5.addActionListener(this);
but6.addActionListener(this);
but7.addActionListener(this);
but8.addActionListener(this);
but9.addActionListener(this);
but0.addActionListener(this);
dodaj.addActionListener(this);
odejmij.addActionListener(this);
pomnoz.addActionListener(this);
podziel.addActionListener(this);
wynik.addActionListener(this);
czysc.addActionListener(this);
this.setJMenuBar(menuBar);
panel.add(text);
panel.add(but1);
panel.add(but2);
panel.add(but3);
panel.add(but4);
panel.add(but5);
panel.add(but6);
panel.add(but7);
panel.add(but8);
panel.add(but9);
panel.add(but0);
panel.add(dodaj);
panel.add(odejmij);
panel.add(pomnoz);
panel.add(podziel);
panel.add(wynik);
panel.add(czysc);
menuBar.add(Program);
menuBar.add(Edycja);
Program.add(Zamknij);
Edycja.add(Kopiuj);
Edycja.add(Wklej);
// skroty klawiszowe
Zamknij.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,
ActionEvent.CTRL_MASK));
Kopiuj.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,
ActionEvent.CTRL_MASK));
Wklej.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,
ActionEvent.CTRL_MASK));
}
public static void main(String[] args) {
new Kalkulator();
}
@Override
public void actionPerformed(ActionEvent a) {
// TODO Auto-generated method stub
if (a.getSource() == Zamknij)
Zamknij();
if (a.getSource() == but1)
but1();
if (a.getSource() == but2)
but2();
if (a.getSource() == but3)
but3();
if (a.getSource() == but4)
but4();
if (a.getSource() == but5)
but5();
if (a.getSource() == but6)
but6();
if (a.getSource() == but7)
but7();
if (a.getSource() == but8)
but8();
if (a.getSource() == but9)
but9();
if (a.getSource() == but0)
but0();
if (a.getSource() == dodaj)
dodaj();
if (a.getSource() == odejmij)
odejmij();
if (a.getSource() == pomnoz)
pomnoz();
if (a.getSource() == wynik)
wynik();
}
}