calculator.java

现在在国外大学里最流行的java学习软件,同时还有大量的example,在名为project的文件里.安装好后用bluej打开peoject的例子,可以进行你想要的任何变化.同时可以了解大量的源码

/**
 * The main class of a simple calculator. Create one of these and you'll
 * get the calculator on screen.
 * 
 * @author David J. Barnes and Michael Kolling
 * @version 2006.03.30
 */
public class Calculator
{
    private CalcEngine engine;
    private UserInterface gui;

    /**
     * Create a new calculator and show it.
     */
    public Calculator()
    {
        engine = new CalcEngine();
        gui = new UserInterface(engine);
    }

    /**
     * In case the window was closed, show it again.
     */
    public void show()
    {
        gui.setVisible(true);
    }
}