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为什么切换标签页时JTextArea会消失？我正在运行Ubuntu Linux，如果这有所作为的话。为什么切换标签时JTextArea会消失？
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.TextArea;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
public class LogView extends JPanel {
private JLabel titleLabel;
private TextArea orderViewArea;
public LogView() {
setLayout(new BorderLayout());
JPanel mainPanel = new JPanel();
titleLabel = new JLabel("Logging Information");
// titleLabel.setPreferredSize(new Dimension(600,50));
mainPanel.setLayout(new GridBagLayout());
GridBagConstraints constraints = new GridBagConstraints();
String[] tempstuff = { "Active", "ALL", "Stuff" };
JComboBox stageList = new JComboBox(tempstuff);
stageList.setSelectedIndex(0);
JComboBox otherList = new JComboBox(tempstuff);
otherList.setSelectedIndex(0);
JLabel dateStart = new JLabel("Date Start: ");
JLabel dateEnd = new JLabel("Date End: ");
JTextField dateStartField = new JTextField(9);
JTextField dateEndField = new JTextField(9);
JPanel datePanel = new JPanel(new FlowLayout());
datePanel.add(dateStart);
datePanel.add(dateStartField);
datePanel.add(dateEnd);
datePanel.add(dateEndField);
List s = new ArrayList();
s.add("test1");
s.add("test2");
JList orderJList = new JList();
orderJList.setListData(s.toArray());
orderJList
.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
orderViewArea = new TextArea();
orderViewArea.setEditable(false);
orderViewArea.setText("Log stuff:\n Pizza\n Rochester\n stuff");
constraints.insets = new Insets(10, 10, 10, 10);
constraints.weighty = 0;
constraints.gridx = 0;
constraints.gridy = 0;
constraints.fill = GridBagConstraints.HORIZONTAL;
mainPanel.add(titleLabel, constraints);
constraints.weighty = 0;
constraints.gridx = 0;
constraints.gridy = 1;
constraints.fill = GridBagConstraints.HORIZONTAL;
mainPanel.add(stageList, constraints);
constraints.weighty = 0;
constraints.gridx = 0;
constraints.gridy = 2;
constraints.fill = GridBagConstraints.HORIZONTAL;
mainPanel.add(datePanel, constraints);
/*
constraints.weighty = 0;
constraints.gridx = 0;
constraints.gridy = 3;
constraints.fill = GridBagConstraints.HORIZONTAL;
mainPanel.add(otherList, constraints);
*/
constraints.weighty = 1;
constraints.gridx = 0;
constraints.gridy = 3;
constraints.fill = GridBagConstraints.BOTH;
mainPanel.add(orderJList, constraints);
//otherList.setVisible(false);
JScrollPane scroll = new JScrollPane(orderViewArea);
constraints.gridx = 1;
constraints.gridy = 2;
constraints.gridheight = 2;
constraints.ipady = 5;
constraints.weighty = 1;
constraints.weightx = 1;
constraints.fill = GridBagConstraints.BOTH;
mainPanel.add(scroll, constraints);
add(mainPanel);
}
public static void main(String args[]){
JFrame test = new JFrame("TEST");
JTabbedPane tabs = new JTabbedPane();
tabs.addTab("test", new LogView());
tabs.addTab("Test3", new JPanel());
test.add(tabs);
test.pack();
test.setVisible(true);
}
}
摇摆GUI对象应当被构造和操作的_only_ [事件调度线程]上（http://download.oracle.com/javase/tutorial/uiswing/concurrency/initial.html）。 – trashgod 2012-02-17 05:23:13
无法重现。 – trashgod 2012-02-17 05:35:24
@trashgod在Windows上相同。 OTOH的代码是混合Swing和AWT组件，所以如果我要翻转硬币并开始制作WAGs .. – 2012-02-17 05:39:55