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| 1 | - | class AscoltatoreMouse extends MouseAdapter{
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| 1 | + | import javax.swing.JFrame; |
| 2 | import javax.swing.Action; | |
| 3 | import javax.swing.JButton; | |
| 4 | import javax.swing.JLabel; | |
| 5 | import javax.swing.JPanel; | |
| 6 | import java.awt.GridLayout; | |
| 7 | import javax.swing.JOptionPane; | |
| 8 | import java.awt.TextField; | |
| 9 | - | }//AscoltatoreMouse |
| 9 | + | import java.awt.event.KeyAdapter; |
| 10 | import java.awt.event.KeyEvent; | |
| 11 | import java.awt.event.MouseAdapter; | |
| 12 | import java.awt.event.MouseEvent; | |
| 13 | ||
| 14 | public class Calcolatrice extends JFrame{
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| 15 | ||
| 16 | private JButton[] numeri = new JButton[12]; | |
| 17 | private JButton[] operatori = new JButton[4]; | |
| 18 | private TextField casellaDiCalcolo = new TextField(); | |
| 19 | private String stampa = ""; | |
| 20 | ||
| 21 | ||
| 22 | public Calcolatrice(){
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| 23 | setVisible(true); | |
| 24 | setSize(500,500); | |
| 25 | setLayout(new GridLayout(3,1)); | |
| 26 | add(casellaDiCalcolo); | |
| 27 | add(new TabNumeri()); | |
| 28 | add(new TabOperatori()); | |
| 29 | addMouseListener(new AscoltatoreMouse()); | |
| 30 | setDefaultCloseOperation(EXIT_ON_CLOSE); | |
| 31 | }//Calcolatrice | |
| 32 | ||
| 33 | ||
| 34 | class AscoltatoreMouse extends MouseAdapter{
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| 35 | public void mousePressed(MouseEvent e){
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| 36 | JButton bottoneMagico; | |
| 37 | if(e.getComponent() instanceof JButton) {
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| 38 | bottoneMagico = (JButton)e.getComponent(); | |
| 39 | casellaDiCalcolo.setText(bottoneMagico.getText()); | |
| 40 | }//if | |
| 41 | }//mousePressed | |
| 42 | }//AscoltatoreMouse | |
| 43 | ||
| 44 | ||
| 45 | class TabNumeri extends JPanel{
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| 46 | public TabNumeri(){
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| 47 | setLayout(new GridLayout(4,3)); | |
| 48 | for(int i=9;i>-1;i--){
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| 49 | numeri[i] = new JButton(""+i);
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| 50 | add(numeri[i]); | |
| 51 | }//for | |
| 52 | numeri[10] = new JButton("=");
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| 53 | add(numeri[10]); | |
| 54 | numeri[11] = new JButton(".");
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| 55 | add(numeri[11]); | |
| 56 | }//TabNumeri | |
| 57 | }//TabNumeri | |
| 58 | ||
| 59 | class TabOperatori extends JPanel{
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| 60 | public TabOperatori(){
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| 61 | setLayout(new GridLayout(1,4)); | |
| 62 | operatori[0] = new JButton("/");
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| 63 | add(operatori[0]); | |
| 64 | operatori[1] = new JButton("*");
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| 65 | add(operatori[1]); | |
| 66 | operatori[2] = new JButton("-");
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| 67 | add(operatori[2]); | |
| 68 | operatori[3] = new JButton("+");
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| 69 | add(operatori[3]); | |
| 70 | }//TabOperatori | |
| 71 | }//TabOperatori | |
| 72 | ||
| 73 | }//Calcolatrice |
