资 源 简 介
// calc-ui-model/Calc.java -- Fred Swartz// Level : Intermediate.// Structure : Three files: main, GUI (subclass of JFrame), logic.// Components: JButton, JTextField (right justified).// Containers: JFrame, several JPanels.// Layouts : BorderLayout to put the other panels together.// Two GridLayout panels for the buttons.// Listeners : One ActionListener which is shared by all// numeric key buttons. Similarly share// an ActionListener for all operator buttons.//
