SHOW:
|
|
- or go back to the newest paste.
| 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 | 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{
| |
| 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(){
| |
| 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{
| |
| 35 | private double op1 = 0; | |
| 36 | private double op2 = 0; | |
| 37 | private boolean isOp2 = false; | |
| 38 | - | private string operatore = "+"; |
| 38 | + | private String operatore = "+"; |
| 39 | ||
| 40 | public void mousePressed(MouseEvent e){
| |
| 41 | JButton bottoneMagico; | |
| 42 | if(e.getComponent() instanceof JButton) {
| |
| 43 | bottoneMagico = (JButton)e.getComponent(); | |
| 44 | - | if(bottoneMagico.getText().isDigit()) |
| 44 | + | if(Character.isDigit(bottoneMagico.getText().charAt(0))) |
| 45 | casellaDiCalcolo.setText(casellaDiCalcolo.getText()+bottoneMagico.getText()); | |
| 46 | else {
| |
| 47 | operatore = bottoneMagico.getText(); | |
| 48 | ||
| 49 | if(isOp2) {
| |
| 50 | op2 = Double.parseDouble(casellaDiCalcolo.getText()); | |
| 51 | } else {
| |
| 52 | op1 = Double.parseDouble(casellaDiCalcolo.getText()); | |
| 53 | } | |
| 54 | ||
| 55 | casellaDiCalcolo.setText("");
| |
| 56 | isOp2 = !isOp2; | |
| 57 | ||
| 58 | if(bottoneMagico.getText() == "=") {
| |
| 59 | - | if(operatore == "+") casellaDiCalcolo.setText(op1 + op2); |
| 59 | + | if(operatore == "+") casellaDiCalcolo.setText(""+(op1 + op2));
|
| 60 | - | if(operatore == "-") casellaDiCalcolo.setText(op1 - op2); |
| 60 | + | if(operatore == "-") casellaDiCalcolo.setText(""+(op1 - op2));
|
| 61 | - | if(operatore == "*") casellaDiCalcolo.setText(op1 * op2); |
| 61 | + | if(operatore == "*") casellaDiCalcolo.setText(""+(op1 * op2));
|
| 62 | - | if(operatore == "/") casellaDiCalcolo.setText(op1 / op2); |
| 62 | + | if(operatore == "/") casellaDiCalcolo.setText(""+(op1 / op2));
|
| 63 | } | |
| 64 | } | |
| 65 | }//if | |
| 66 | }//mousePressed | |
| 67 | }//AscoltatoreMouse | |
| 68 | ||
| 69 | ||
| 70 | class TabNumeri extends JPanel{
| |
| 71 | public TabNumeri(){
| |
| 72 | setLayout(new GridLayout(4,3)); | |
| 73 | for(int i=9;i>-1;i--){
| |
| 74 | numeri[i] = new JButton(""+i);
| |
| 75 | add(numeri[i]); | |
| 76 | }//for | |
| 77 | numeri[10] = new JButton("=");
| |
| 78 | add(numeri[10]); | |
| 79 | numeri[11] = new JButton(".");
| |
| 80 | add(numeri[11]); | |
| 81 | }//TabNumeri | |
| 82 | }//TabNumeri | |
| 83 | ||
| 84 | class TabOperatori extends JPanel{
| |
| 85 | public TabOperatori(){
| |
| 86 | setLayout(new GridLayout(1,4)); | |
| 87 | operatori[0] = new JButton("/");
| |
| 88 | add(operatori[0]); | |
| 89 | operatori[1] = new JButton("*");
| |
| 90 | add(operatori[1]); | |
| 91 | operatori[2] = new JButton("-");
| |
| 92 | add(operatori[2]); | |
| 93 | operatori[3] = new JButton("+");
| |
| 94 | add(operatori[3]); | |
| 95 | }//TabOperatori | |
| 96 | }//TabOperatori | |
| 97 | ||
| 98 | }//Calcolatrice |
