好了,所以我簡單地定義,像這樣的組合框...鞦韆組合框
JComboBox yearSelect = new JComboBox();
現在,我還沒有將此添加到面板或任何東西,我剛纔定義它。當我運行該應用程序時,沒有任何顯示..當我註釋掉這條線......該應用程序顯示其他面板,就像我想要的那樣..是否有什麼我做錯了?也許我忘記了一些與組合框有關的事情?我想這可能是我錯過的一些愚蠢的東西。
這是我的整個內容構造函數。
private Container pane; // content pane
private JPanel calendarPanel; // where our calendar will go
private JPanel datePanel; // where "todays date" will go
private JPanel pnlToolbar; // tool bar for moving in the year
private JPanel bottomPanel;
private JPanel yearPanel;
private JLabel lbCurrentMonth;
private JLabel dateLabel;
private JButton monthBack;
private JButton monthForward;
private JComboBox yearSelect;
private Date today = new Date();
private int currentMonth = today.getMonth();
private int currentYear = today.getYear();
final private String [] days = {"Sunday", "Monday", "Tuesday",
"Wednesday", "Thursday", "Friday",
"Saturday"};
final private String [] months = {"January", "Febuary", "March", "April",
"May", "June", "July", "August",
"September", "October", "November",
"December"};
public Calendar() {
// call the calendar frame class constructor (Window class)
// this function will setup our basic window
super();
// define the current date of the calendar as today
// below are attributes to our window. They define what content
// is on them.
// define our window
pane = window.getContentPane();
pane.setLayout(new BorderLayout());
calendarPanel = new JPanel(new FlowLayout());
calendarPanel.setBorder(BorderFactory.createTitledBorder("Calendar"));
pnlToolbar = new JPanel(new FlowLayout(FlowLayout.CENTER, 40, 5));
pnlToolbar.setSize(300, 45);
//////////////////////////////////////////////////////////////////////
/* setup our lower date panel, that displays todays date
and the year drop down menu */
// for "todays date"
dateLabel = new JLabel(returnDateString());
dateLabel.setFont(new Font(null, Font.BOLD, 12));
datePanel = new JPanel(new FlowLayout(FlowLayout.LEFT, 5, 5));
datePanel.add(new JLabel("Todays Date: "), BorderLayout.WEST);
datePanel.add(dateLabel, BorderLayout.EAST);
// for "year select"
// yearSelect = new JComboBox();
yearPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT, 5, 5));
//yearPanel.add(yearSelect);
bottomPanel = new JPanel(new BorderLayout());
bottomPanel.add(datePanel, BorderLayout.WEST);
//bottomPanel.add(yearPanel, BorderLayout.EAST);
// setup the tool bar panel
lbCurrentMonth = new JLabel(months[currentMonth]);
monthBack = new JButton("<<");
monthForward = new JButton(">>");
monthForward.setEnabled(true);
monthBack.setEnabled(true);
pnlToolbar.add(monthBack);
pnlToolbar.add(lbCurrentMonth);
pnlToolbar.add(monthForward);
// add everything to the content panel
pane.add(calendarPanel, BorderLayout.CENTER);
pane.add(bottomPanel, BorderLayout.SOUTH);
pane.add(pnlToolbar, BorderLayout.NORTH);
沒有看到你的代碼的其餘部分,很難說。 – 2010-04-19 01:39:33
你是不是故意說'JComboBox yearSelect = new JComboBox();'導致錯誤的面板渲染?這個問題不是很清楚。 – 2010-04-19 16:28:49
發佈您的實際Java文件(無任何關鍵業務信息) – 2010-04-19 16:38:29