Page History

public class CalculatorProgram {

	private Calculator calculator;

	void init() {
		calculator = new Calculator();
	}

	void run() {
		BufferedReader reader        Scanner scanner = new BufferedReaderScanner(new InputStreamReader(System.in));
		        while (scanner.hasNextLine(true)) {
			            String line = readerscanner.readLinenextLine();
			            if (line == null || line.trim().length() == 0) {
				break;
			                System.err.println(calc1);
                break;
            }
			double arg = 0.0, result = 0.0;
			char firstChar = line.charAt(0);
			if (Character.isDigit(firstChar)) {
				arg = Double.valueOf(line);
			else {
				arg = Double.valueOf(line.substring(1)));
			}
			if (Character.isDigit(firstChar)) {
				result = calculator.setValue(arg);
			} else if (firstChar == '+') {
				result = calculator.add(arg);
			} else if (firstChar == '-') {
				result = calculator.subtract(arg);
			} else if (firstChar == '*') {
				result = calculator.multiply(arg);
			} else if (firstChar == '/') {
				result = calculator.divide(arg);
			}
		}
		System.out.println(result);
	}

	public static void main(String[] args) {
		CalculatorProgram calculatorProgram = new CalculatorProgram();
		calculatorProgram.init();
		calculatorProgram.run();
	}
}

class "CalculatorProgram" as hovedprogram {
   init()
   run()
}

class "Calculator" as kalkulator {
   -double value
   +double getValue()
   +void setValue(double)
   +double add(double)
   +double subtract(double)
   +double multiply(double)
   +double divide(double)
}

hovedprogram --> kalkulator: calculator