package stockinterface;import javax.swing.UIManager;import java.awt.*;import javax.swing.*;import maininterface.*;public class CashLedgerViewApp {  public CashLedgerViewApp() {    //創建主窗口類，該類供測試使用    StockManagementMainFrame stockManagementMainFrame = new StockManagementMainFrame();    //創建用戶類    user.User user = new user.User("jack", "jack", 4095, 16, 2088, 0);    //取得進貨模塊的用戶權限    int stockFunction = user.getStockFunction();    if((stockFunction & 16) != 16){      JOptionPane.showMessageDialog(null, user.getUserName() + "用戶不具有該權限.");      System.exit(0);    }    //設置主窗口的用戶類    stockManagementMainFrame.setUser(user);    //設置主窗口的賬套    stockManagementMainFrame.setLedgerDate("200405");    CashLedgerViewFrame frame = new CashLedgerViewFrame(stockManagementMainFrame);    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();    Dimension frameSize = frame.getSize();    if (frameSize.height > screenSize.height) {      frameSize.height = screenSize.height;    }    if (frameSize.width > screenSize.width) {      frameSize.width = screenSize.width;    }    frame.setLocation( (screenSize.width - frameSize.width) / 2,                      (screenSize.height - frameSize.height) / 2);    frame.setVisible(true);  }  public static void main(String[] args) {    try {      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());    }    catch(Exception e) {      e.printStackTrace();    }    new CashLedgerViewApp();  }}