form.setCommandListener(new CommandListener() { public void commandAction(Command c, Displayable d) { if (c == cmdAdd) { operator = "+"; siOperator.setText("Operator: " + operator); tfNumber1.setVisible(false); tfNumber2.setVisible(true); tfNumber2.setString(""); display.setCurrent(form); isNumber1 = false; } else if (c == cmdSub) { operator = "-"; siOperator.setText("Operator: " + operator); tfNumber1.setVisible(false); tfNumber2.setVisible(true); tfNumber2.setString(""); display.setCurrent(form); isNumber1 = false; } else if (c == cmdMul) { operator = "*"; siOperator.setText("Operator: " + operator); tfNumber1.setVisible(false); tfNumber2.setVisible(true); tfNumber2.setString(""); display.setCurrent(form); isNumber1 = false; } else if (c == cmdDiv) { operator = "/"; siOperator.setText("Operator: " + operator); tfNumber1.setVisible(false); tfNumber2.setVisible(true); tfNumber2.setString(""); display.setCurrent(form); isNumber1 = false; } else if (c == cmdEq) { if (isNumber1) { num1 = tfNumber1.getString(); } else { num2 = tfNumber2.getString(); }
double n1 = Double.parseDouble(num1); double n2 = Double.parseDouble(num2); double res = 0; nokia dct4 calculator
tfNumber1 = new TextField("Number 1: ", "", 10, TextField.NUMERIC); form.append(tfNumber1); siOperator.setText("Operator: " + operator)
siResult.setText("Result: " + res); tfNumber1.setString(""); tfNumber2.setString(""); tfNumber1.setVisible(true); tfNumber2.setVisible(false); isNumber1 = true; } else if (c == cmdExit) { destroyApp(true); } } }); isNumber1 = false
StringItem siResult = new StringItem("Result: ", ""); form.append(siResult);
Command cmdAdd = new Command("Add", Command.OK, 1); Command cmdSub = new Command("Subtract", Command.OK, 2); Command cmdMul = new Command("Multiply", Command.OK, 3); Command cmdDiv = new Command("Divide", Command.OK, 4); Command cmdEq = new Command("Equals", Command.OK, 5); Command cmdExit = new Command("Exit", Command.EXIT, 1);
public CalculatorMIDlet() { display = Display.getDisplay(this); }