java正在向JPanel添加元素,但它们没有显示
我一直在尝试在一个JPanel中添加一组复杂的元素,根据返回的列数进行布局,并在一个新的面板中显示它们,该面板通过点击按钮生成
我做错了什么,但不知道是什么。 替换header面板中的其他文本元素绝对可以,但看不出为什么我生成的代码没有添加到面板中(或者更可能的是,面板没有以可访问的方式显示)
My JPanel output code -
private JPanel getOutput() throws BadIdent {
short[] HDformats = { HDformat, Audformat };
short[] SDformats = { SDformat, Audformat };
List poolInfo;
List freeSpaceHD = null;
List freeSpaceSD = null;
System.out.println(man.getZoneNumberName());
// System.out.println(man.getPoolInfo());
poolInfo = man.getPoolInfo();
List poolSpace = man.getPoolSpace();
if ((Short) HDformat != null) {
freeSpaceHD = man.getFreeSpace(HDformats);
}
if ((Short) SDformat != null) {
freeSpaceSD = man.getFreeSpace(SDformats);
}
JPanel content_panel = new JPanel(new GridLayout(poolInfo.size(), 4));
JLabel[] PoolInfoLabel = new JLabel[poolInfo.size()];
JLabel[] PoolSpaceLabel = new JLabel[poolInfo.size()];
JLabel[] PoolSpaceHDLabel = new JLabel[poolInfo.size()];
JLabel[] PoolSpaceSDLabel = new JLabel[poolInfo.size()];
JPanel[] PoolInfo = new JPanel[poolInfo.size()];
// GridBagConstraints gbc_lblPoolInfo[] = new
// GridBagConstraints[poolInfo
// .size()];
// JLabel[] PoolInfoLabel = new JLabel[poolInfo.size()];
for (int i = 0; i < poolInfo.size(); i++) {
PoolInfoLabel[i] = new JLabel();
PoolSpaceLabel[i] = new JLabel();
PoolSpaceHDLabel[i] = new JLabel();
PoolSpaceSDLabel[i] = new JLabel();
PoolInfoLabel[i].setText((String) poolInfo.get(i));
System.out.println(poolInfo.get(i));
PoolSpaceLabel[i].setText((String) poolSpace.get(i));
PoolSpaceHDLabel[i].setText((String) freeSpaceHD.get(i));
PoolSpaceSDLabel[i].setText((String) freeSpaceSD.get(i));
//
// System.out.println(PoolInfoLabel[i].getText());
}
for (int i = 0; i < PoolInfoLabel.length; i++) {
PoolInfo[i] = new JPanel();
PoolInfo[i].add(PoolInfoLabel[i]);
PoolInfo[i].add(PoolSpaceLabel[i]);
PoolInfo[i].add(PoolSpaceHDLabel[i]);
PoolInfo[i].add(PoolSpaceSDLabel[i]);
System.out.println(PoolSpaceLabel[i].getText());
System.out.println(PoolSpaceSDLabel[i].getText());
System.out.println(PoolSpaceHDLabel[i].getText());
}
for (int i = 0; i < PoolInfo.length; i++) {
content_panel.add(PoolInfo[i]);
}
return content_panel;
}
用于在面板和框架中添加和更改元素的按钮代码(框架是主显示,面板是标题,位于北边框布局中)。 这三个组合框被正确添加和显示,我使用的生成和显示它们的机制与我在getOutput()函数中使用的基本相同
JButton ButtonSubmit = new JButton("Connect");
ButtonSubmit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
man.ManagerConnect(ISAHostName.getText(), null);
// System.out.println(man.getZoneNumberName());
ZoneNumName.setText(man.getZoneNumberName());
AudFormat = getAudCombo();
HDVidFormat = getHDCombo();
SDVidFormat = getSDCombo();
panel.add(HDVidFormat, gbc_HDVidFormat);
panel.add(SDVidFormat, gbc_SDVidFormat);
panel.add(AudFormat, gbc_AudFormat);
btnFormatButton.setEnabled(true);
frame.repaint();
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
});
panel.add(ButtonSubmit, gbc_ButtonSubmit);
btnFormatButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
JPanel content_panel = getOutput();
frame.getContentPane().add(content_panel,
BorderLayout.CENTER);
} catch (BadIdent e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
});
panel.add(btnFormatButton, gbc_btnNewButton);
供参考-获取高清格式组合框
private JPanel getHDCombo() {
JComboBox combo = new JComboBox();
combo.setFont(new Font("Tahoma", Font.PLAIN, 10));
combo.setMaximumRowCount(10);
final Map<String, Integer> map = man.HDVidFormats();
Collection<String> keys = map.keySet();
Iterator<String> it = keys.iterator();
while (it.hasNext()) {
String key = it.next();
combo.addItem(key);
}
combo.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JComboBox combo = (JComboBox) e.getSource();
String key = (String) combo.getSelectedItem();
int format = map.get(key);
System.out.println(format);
HDformat = (short) format;
}
});
JPanel panel = new JPanel();
panel.setBackground(new Color(0, 0, 0, 0));
panel.add(combo);
return panel;
}
我相信这很简单,但我真的不明白为什么没有添加面板 抱歉,我已经好几年没有用Java从头开始编写GUI代码了
共 (0) 个答案