我正在尝试使用 DefaultListModel 在 JList 中显示 JPanel。一切都编译得很好，所以我不确定出了什么问题。它实际上在某个时候工作过，但我必须在一个更大的项目中实现它，但现在它停止工作了。问题很可能出在 Jp_Diskussion 中的某个地方，但我就是找不到它......
public class Jp_Diskussion extends JPanel {
private Jd_BeitragErstellen jd_beitr_erst;
private Jd_BeitragBearbeiten jd_beitr_bearb;
private JFrame parentFrame = (JFrame) this.getParent();
private JComboBox comboBoxMA;
private JComboBox comboBoxTag;
private JButton btnFiltern;
private JLabel labelFiltern;
private JLabel labelOpt;
private JButton btnBeitragVerfassen;
private JScrollPane messageScroll;
public Jp_Diskussion() {
createMessageList();
}
private void createMessageList() {
setBounds(new Rectangle(0, 0, 994, 624));
setLayout(null);
add(getJScrollPane());
add(getComboBoxTag());
add(getComboBox_2());
add(getBtnFiltern());
add(getLabelFiltern());
add(getLabelOpt());
add(getBtnBeitragVerfassen());
}
private JScrollPane getJScrollPane() {
if (messageScroll == null) {
MessageList m = new MessageList();
m.getMessage("NAME AUTOR", "<html><body style='width: 690px;'>Lorem ipsum dolor sit amet.", "22.01.13", "SOA");
m.getMessage("AUTOR NAME", "<html><body style='width: 690px;'>Lorem ipsum dolor sit amet.", "22.01.13", "SOA");
messageScroll = new JScrollPane(m);
messageScroll.setBounds(20, 20, 954, 461);
}
return messageScroll;
}
private JButton getBtnBeitragVerfassen() {
private JLabel getLabelFiltern() {
private JLabel getLabelOpt() {
private JComboBox getComboBoxTag() {
private JComboBox getComboBox_2() {
private JButton getBtnFiltern() {
}
JList:
public class MessageList extends JList{
DefaultListModel messageModel = new DefaultListModel();
JList messageList = new JList(messageModel);
MessageRenderer messageRenderer = new MessageRenderer();
public MessageList( ){
messageList.setCellRenderer(messageRenderer);
}
public void getMessage(String author, String text, String date, String tag){
messageModel.addElement(new Message(author, text, date, tag));
}
}
消息类:
public class Message extends JPanel{
JLabel lblAuthor = new JLabel();
JLabel lblText = new JLabel();
JLabel lblDate = new JLabel();
JLabel lblTag = new JLabel();
public Message(String author, String text, String date, String tag){
lblAuthor.setText(author);
lblText.setText(text);
lblDate.setText(date);
lblTag.setText(tag);
add(lblAuthor,BorderLayout.NORTH);
add(lblText,BorderLayout.WEST);
add(lblDate,BorderLayout.SOUTH);
add(lblTag,BorderLayout.EAST);
GroupLayout groupLayout = new GroupLayout(this);
groupLayout.setHorizontalGroup(groupLayout.createSequentialGroup()
.addGroup(groupLayout.createParallelGroup()
.addComponent(lblAuthor)
.addComponent(lblText)
.addComponent(lblTag))
.addComponent(lblDate))
;
groupLayout.setVerticalGroup(groupLayout.createSequentialGroup()
.addGroup(groupLayout.createParallelGroup()
.addComponent(lblAuthor)
.addComponent(lblDate))
.addComponent(lblText)
.addComponent(lblTag))
;
this.setLayout(groupLayout);
}
}
我的渲染器:
public class MessageRenderer implements ListCellRenderer {
public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
Component component = (Component)value;
if (isSelected) {
component.setBackground(Color.RED);
} else {
component.setBackground(Color.GREEN);
}
return component;
}
}
最佳答案
public class MessageList extends JList{
DefaultListModel messageModel = new DefaultListModel();
MessageRenderer messageRenderer = new MessageRenderer();
public MessageList( ){
this.setCellRenderer(messageRenderer);
this.setModel(messageModel);
}
public void getMessage(String author, String text, String date, String tag){
messageModel.addElement(new Message(author, text, date, tag));
}
}
关于java - 数据未显示在 JList 中，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20658790/