javax.swing：JEditorPane（html页面）没有出现在主框架上
Browser 类具有方法 getBrowserWindow()，该方法返回 JEditorPane(new URL("some URL"))。
MainForm 类调用 new Browser()。 getBrowserWindow() 并将其分配给另一个 JEditorPane 对象。
editor = new Browser().getBrowserWindow();
scrollpane = new JScrollPane(editor);
对象编辑器.hashCode()是正确的，所以毫无疑问我得到了正确的对象。
尽管如此，我在主框架中看不到 html 页面。
PS 我尝试创建仅填充文本的简单 JEditorPane，而不是 htmlpane， 而这个我也看不到。
聚苯硫醚
package faxutils;
import javax.swing.*;
import javax.swing.border.TitledBorder;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.URL;
public class MainForm {
public MainForm() {
}
private static GeneralActions ga = new GeneralActions();
private static Arguments _args_for_Update;
private static String _Phone;
private static JTextField[] emails;
private static MyConstants c = new MyConstants();
private static JFrame frame = new JFrame("frame title");
private static JCheckBox c2 = new JCheckBox("SMS Notification");
private static JCheckBox c1 = new JCheckBox("PDF");
private static JCheckBox c3 = new JCheckBox("153");
private static JTextField textBox1 = new JTextField(20);
private static JTextField textBox2 = new JTextField(20);
private static JTextField textBox3 = new JTextField(20);
private static JTextField textBox4 = new JTextField(20);
private static JTextArea richText = new JTextArea();
private static JEditorPane log = new JEditorPane();
private static JScrollPane scrollp = new JScrollPane(richText);
private static JScrollPane scrollplog = new JScrollPane(log);
private static JPanel p1 = new JPanel();
private static JPanel p2 = new JPanel();
private static JLabel label3 = new JLabel("Send to:");
private static JLabel label2 = new JLabel("number");
private static JLabel label = new JLabel("Fax:");
private static JPanel p3 = new JPanel();
private static JButton button1 = new JButton("Search");
private static JButton button2 = new JButton("Save");
private static JButton button3 = new JButton("Send");
private static Component[] comp = new Component[]{c1, c2, c3, textBox2, textBox3, textBox3, textBox4, richText, log, button2, button3};
private static void createAndShowGUI() {
//Create and set up the window.
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Set up the content pane.
Container contentPane = frame.getContentPane();
SpringLayout layout1 = new SpringLayout();
SpringLayout layout2 = new SpringLayout();
SpringLayout layout3 = new SpringLayout();
SpringLayout frmlayout = new SpringLayout();
p1.setBorder(new TitledBorder("Search"));
p2.setBorder(new TitledBorder("Customer details"));
p3.setBorder(new TitledBorder("Send test fax"));
p1.setLayout(layout1);
p2.setLayout(layout2);
p3.setLayout(layout3);
frame.setLayout(frmlayout);
//Create and add the components to p1.
p1.add(label);
p1.add(textBox1);
p1.add(button1);
//Create and add the components to p2
p2.add(scrollp);
p2.add(textBox2);
p2.add(textBox3);
p2.add(textBox4);
p2.add(c1);
p2.add(c2);
p2.add(button2);
//Create and add the components to p3
p3.add(c3);
p3.add(label3);
p3.add(label2);
p3.add(button3);
p3.add(scrollplog);
//Add panels to frame
contentPane.add(p1);
contentPane.add(p2);
contentPane.add(p3);
//Layout1
//label
layout1.putConstraint(SpringLayout.WEST, label,
5,
SpringLayout.WEST, p1);
layout1.putConstraint(SpringLayout.NORTH, label,
5,
SpringLayout.NORTH, p1);
//textbox1
layout1.putConstraint(SpringLayout.WEST, textBox1,
30,
SpringLayout.WEST, label);
layout1.putConstraint(SpringLayout.NORTH, textBox1,
0,
SpringLayout.NORTH, label);
//button1
layout1.putConstraint(SpringLayout.WEST, button1,
230,
SpringLayout.WEST, textBox1);
layout1.putConstraint(SpringLayout.NORTH, button1,
-5,
SpringLayout.NORTH, textBox1);
//Layout2
//RICHTEXT
layout2.putConstraint(SpringLayout.WEST, scrollp, 5, SpringLayout.WEST, p2);
layout2.putConstraint(SpringLayout.NORTH, scrollp, 5, SpringLayout.NORTH, p2);
layout2.putConstraint(SpringLayout.EAST, scrollp, -5, SpringLayout.EAST, p2);
layout2.putConstraint(SpringLayout.SOUTH, scrollp, -150, SpringLayout.SOUTH, p2);
//TEXTBOX1,2,3
layout2.putConstraint(SpringLayout.WEST, textBox2, 140, SpringLayout.WEST, scrollp);
layout2.putConstraint(SpringLayout.NORTH, textBox2, 130, SpringLayout.NORTH, scrollp);
layout2.putConstraint(SpringLayout.WEST, textBox3, 0, SpringLayout.WEST, textBox2);
layout2.putConstraint(SpringLayout.NORTH, textBox3, 25, SpringLayout.NORTH, textBox2);
layout2.putConstraint(SpringLayout.WEST, textBox4, 0, SpringLayout.WEST, textBox3);
layout2.putConstraint(SpringLayout.NORTH, textBox4, 25, SpringLayout.NORTH, textBox3);
//CHECKBOXES
layout2.putConstraint(SpringLayout.WEST, c1, 0, SpringLayout.WEST, scrollp);
layout2.putConstraint(SpringLayout.NORTH, c1, 200, SpringLayout.NORTH, scrollp);
layout2.putConstraint(SpringLayout.WEST, c2, 0, SpringLayout.WEST, c1);
layout2.putConstraint(SpringLayout.NORTH, c2, 25, SpringLayout.NORTH, c1);
//BUTTON
layout2.putConstraint(SpringLayout.WEST, button2, 160, SpringLayout.WEST, textBox4);
layout2.putConstraint(SpringLayout.NORTH, button2, 25, SpringLayout.NORTH, textBox4);
//Layout3
//CHECKBOX3
layout3.putConstraint(SpringLayout.WEST, c3, 5, SpringLayout.WEST, p3);
layout3.putConstraint(SpringLayout.NORTH, c3, 5, SpringLayout.NORTH, p3);
//label3
layout3.putConstraint(SpringLayout.WEST, label3, 50, SpringLayout.WEST, c3);
layout3.putConstraint(SpringLayout.NORTH, label3, 4, SpringLayout.NORTH, c3);
// label2
layout3.putConstraint(SpringLayout.WEST, label2, 50, SpringLayout.WEST, label3);
layout3.putConstraint(SpringLayout.NORTH, label2, 0, SpringLayout.NORTH, label3);
//button3
layout3.putConstraint(SpringLayout.WEST, button3, 305, SpringLayout.WEST, p3);
layout3.putConstraint(SpringLayout.NORTH, button3, 0, SpringLayout.NORTH, p3);
//Browser
layout3.putConstraint(SpringLayout.WEST, scrollplog, 0, SpringLayout.WEST, c3);
layout3.putConstraint(SpringLayout.NORTH, scrollplog, 25, SpringLayout.NORTH, c3);
layout3.putConstraint(SpringLayout.EAST, scrollplog, 320, SpringLayout.EAST, c3);
layout3.putConstraint(SpringLayout.SOUTH, scrollplog, 140, SpringLayout.SOUTH, c3);
//FrameLayout
//p1
frmlayout.putConstraint(SpringLayout.WEST, p1,
5,
SpringLayout.WEST, frame);
frmlayout.putConstraint(SpringLayout.NORTH, p1,
5,
SpringLayout.NORTH, frame);
frmlayout.putConstraint(SpringLayout.EAST, p1,
380,
SpringLayout.EAST, frame);
frmlayout.putConstraint(SpringLayout.SOUTH, p1,
50,
SpringLayout.SOUTH, frame);
//p2
frmlayout.putConstraint(SpringLayout.WEST, p2,
5,
SpringLayout.WEST, frame);
frmlayout.putConstraint(SpringLayout.NORTH, p2,
75,
SpringLayout.NORTH, p1);
frmlayout.putConstraint(SpringLayout.EAST, p2,
380,
SpringLayout.EAST, frame);
frmlayout.putConstraint(SpringLayout.SOUTH, p2,
285,
SpringLayout.SOUTH, p1);
//p3
frmlayout.putConstraint(SpringLayout.WEST, p3,
5,
SpringLayout.WEST, frame);
frmlayout.putConstraint(SpringLayout.NORTH, p3,
285,
SpringLayout.NORTH, p2);
frmlayout.putConstraint(SpringLayout.EAST, p3,
380,
SpringLayout.EAST, frame);
frmlayout.putConstraint(SpringLayout.SOUTH, p3,
200,
SpringLayout.SOUTH, p2);
//Display the window.
frame.setSize(400, 600);
initialize();
// frame.pack();
frame.setVisible(true);
}
private static void setPanelsEnabled(boolean b) {
for (int i = 0; i < comp.length; i++)
comp[i].setEnabled(b);
}
private static void initialize() {
try {
emails = new JTextField[]{textBox2, textBox3, textBox4};
textBox1.requestFocus();
setPanelsEnabled(false);
richText.setEditable(false);
log.setEditable(false);
textBox1.setText("enter number here");
} catch (Exception ex) {
System.out.println(c.MSGBOX_EXCEPTION_TITLE + ": " + ex);
}
}
private static void button1_Click() {
try {
label2.setText(textBox1.getText());
_Phone = textBox1.getText();
_args_for_Update = ga.query1(_Phone, c1, c2);
if (_args_for_Update.getUserId() == 0) {
c1.setSelected(false);
c2.setSelected(false);
System.out.println(c.MSGBOX_SEARCH_STATUS_TITLE + ": " + c.MSGBOX_NO_USER_WAS_FOUND);
} else {
richText.setText(_args_for_Update.getUserInfo());
ga.query2(_args_for_Update);
_args_for_Update.setEmailsAmount(ga.fillEmails(_args_for_Update, emails));
}
boolean b = _args_for_Update.getUserId() > 0;
setPanelsEnabled(b);
c3.setSelected(false);
} catch (Exception ex) {
System.out.println(c.MSGBOX_EXCEPTION_TITLE + ": " + ex);
}
}
private static void button2_Click() {
try {
int saveOK = ga.SaveSettings(_args_for_Update, emails, c1, c2);
button1.doClick();
if (saveOK == c.USER_UPDATE_RESULT_0)
System.out.println(c.MSGBOX_EMAIL_CHANGES_STATUS_TITLE + ": " + c.MSGBOX_CANNOT_DELETE_MAIN_EMAIL);
else
System.out.println(c.MSGBOX_USER_STATUS_TITLE + ": " + c.MSGBOX_USER_WAS_SUCCESSFULLY_UPDATED);
} catch (Exception ex) {
System.out.println(c.MSGBOX_EXCEPTION_TITLE + ": " + ex);
}
}
private static void checkBox3_CheckedChanged() {
if (c3.isSelected())
label2.setText(c.FAX_PREFIX_153 + _Phone.substring(1));
else
label2.setText(_Phone);
}
private static void button3_Click() {
try {
// debugging
// log = new Browser().getBrowserWindow(String.format(c.SEND_FAX, ".com")); /////////
log = new JEditorPane(new URL(String.format(c.SEND_FAX, ".com")));
// System.out.println(log.getText());
p3.remove(scrollplog);
scrollplog = new JScrollPane(log); //////////
p3.add(scrollplog, layout3);
scrollplog.repaint();
System.out.println(c.MSGBOX_TEST_FAX_STATUS_TITLE + ": " + c.MSGBOX_FAX_SENDING_IN_PROGRESS);
} catch (Exception ex) {
System.out.println(c.MSGBOX_EXCEPTION_TITLE + ": " + ex);
}
}
public static void main(String[] args) {
try {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
button1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
button1_Click();
}
});
button2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
button2_Click();
}
});
c3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
checkBox3_CheckedChanged();
}
});
button3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
button3_Click();
}
});
createAndShowGUI();
}
});
} catch (Exception e) {
System.out.println(">:)" + e + ">:)");
}
}
}
class Browser has method getBrowserWindow() which returns JEditorPane(new URL("some URL")).
class MainForm calls new Browser().getBrowserWindow() and assigns it to another JEditorPane object.
editor = new Browser().getBrowserWindow();
scrollpane = new JScrollPane(editor);
Object editor.hashCode() is correct, so there's no doubt that i've got the right object.
Still, i can't see html page in the main frame.
P.S. i've tried creating instead of htmlpane simple JEditorPane filled with text only,
and this one i couldn't see neither.
P.P.S.
package faxutils;
import javax.swing.*;
import javax.swing.border.TitledBorder;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.URL;
public class MainForm {
public MainForm() {
}
private static GeneralActions ga = new GeneralActions();
private static Arguments _args_for_Update;
private static String _Phone;
private static JTextField[] emails;
private static MyConstants c = new MyConstants();
private static JFrame frame = new JFrame("frame title");
private static JCheckBox c2 = new JCheckBox("SMS Notification");
private static JCheckBox c1 = new JCheckBox("PDF");
private static JCheckBox c3 = new JCheckBox("153");
private static JTextField textBox1 = new JTextField(20);
private static JTextField textBox2 = new JTextField(20);
private static JTextField textBox3 = new JTextField(20);
private static JTextField textBox4 = new JTextField(20);
private static JTextArea richText = new JTextArea();
private static JEditorPane log = new JEditorPane();
private static JScrollPane scrollp = new JScrollPane(richText);
private static JScrollPane scrollplog = new JScrollPane(log);
private static JPanel p1 = new JPanel();
private static JPanel p2 = new JPanel();
private static JLabel label3 = new JLabel("Send to:");
private static JLabel label2 = new JLabel("number");
private static JLabel label = new JLabel("Fax:");
private static JPanel p3 = new JPanel();
private static JButton button1 = new JButton("Search");
private static JButton button2 = new JButton("Save");
private static JButton button3 = new JButton("Send");
private static Component[] comp = new Component[]{c1, c2, c3, textBox2, textBox3, textBox3, textBox4, richText, log, button2, button3};
private static void createAndShowGUI() {
//Create and set up the window.
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Set up the content pane.
Container contentPane = frame.getContentPane();
SpringLayout layout1 = new SpringLayout();
SpringLayout layout2 = new SpringLayout();
SpringLayout layout3 = new SpringLayout();
SpringLayout frmlayout = new SpringLayout();
p1.setBorder(new TitledBorder("Search"));
p2.setBorder(new TitledBorder("Customer details"));
p3.setBorder(new TitledBorder("Send test fax"));
p1.setLayout(layout1);
p2.setLayout(layout2);
p3.setLayout(layout3);
frame.setLayout(frmlayout);
//Create and add the components to p1.
p1.add(label);
p1.add(textBox1);
p1.add(button1);
//Create and add the components to p2
p2.add(scrollp);
p2.add(textBox2);
p2.add(textBox3);
p2.add(textBox4);
p2.add(c1);
p2.add(c2);
p2.add(button2);
//Create and add the components to p3
p3.add(c3);
p3.add(label3);
p3.add(label2);
p3.add(button3);
p3.add(scrollplog);
//Add panels to frame
contentPane.add(p1);
contentPane.add(p2);
contentPane.add(p3);
//Layout1
//label
layout1.putConstraint(SpringLayout.WEST, label,
5,
SpringLayout.WEST, p1);
layout1.putConstraint(SpringLayout.NORTH, label,
5,
SpringLayout.NORTH, p1);
//textbox1
layout1.putConstraint(SpringLayout.WEST, textBox1,
30,
SpringLayout.WEST, label);
layout1.putConstraint(SpringLayout.NORTH, textBox1,
0,
SpringLayout.NORTH, label);
//button1
layout1.putConstraint(SpringLayout.WEST, button1,
230,
SpringLayout.WEST, textBox1);
layout1.putConstraint(SpringLayout.NORTH, button1,
-5,
SpringLayout.NORTH, textBox1);
//Layout2
//RICHTEXT
layout2.putConstraint(SpringLayout.WEST, scrollp, 5, SpringLayout.WEST, p2);
layout2.putConstraint(SpringLayout.NORTH, scrollp, 5, SpringLayout.NORTH, p2);
layout2.putConstraint(SpringLayout.EAST, scrollp, -5, SpringLayout.EAST, p2);
layout2.putConstraint(SpringLayout.SOUTH, scrollp, -150, SpringLayout.SOUTH, p2);
//TEXTBOX1,2,3
layout2.putConstraint(SpringLayout.WEST, textBox2, 140, SpringLayout.WEST, scrollp);
layout2.putConstraint(SpringLayout.NORTH, textBox2, 130, SpringLayout.NORTH, scrollp);
layout2.putConstraint(SpringLayout.WEST, textBox3, 0, SpringLayout.WEST, textBox2);
layout2.putConstraint(SpringLayout.NORTH, textBox3, 25, SpringLayout.NORTH, textBox2);
layout2.putConstraint(SpringLayout.WEST, textBox4, 0, SpringLayout.WEST, textBox3);
layout2.putConstraint(SpringLayout.NORTH, textBox4, 25, SpringLayout.NORTH, textBox3);
//CHECKBOXES
layout2.putConstraint(SpringLayout.WEST, c1, 0, SpringLayout.WEST, scrollp);
layout2.putConstraint(SpringLayout.NORTH, c1, 200, SpringLayout.NORTH, scrollp);
layout2.putConstraint(SpringLayout.WEST, c2, 0, SpringLayout.WEST, c1);
layout2.putConstraint(SpringLayout.NORTH, c2, 25, SpringLayout.NORTH, c1);
//BUTTON
layout2.putConstraint(SpringLayout.WEST, button2, 160, SpringLayout.WEST, textBox4);
layout2.putConstraint(SpringLayout.NORTH, button2, 25, SpringLayout.NORTH, textBox4);
//Layout3
//CHECKBOX3
layout3.putConstraint(SpringLayout.WEST, c3, 5, SpringLayout.WEST, p3);
layout3.putConstraint(SpringLayout.NORTH, c3, 5, SpringLayout.NORTH, p3);
//label3
layout3.putConstraint(SpringLayout.WEST, label3, 50, SpringLayout.WEST, c3);
layout3.putConstraint(SpringLayout.NORTH, label3, 4, SpringLayout.NORTH, c3);
// label2
layout3.putConstraint(SpringLayout.WEST, label2, 50, SpringLayout.WEST, label3);
layout3.putConstraint(SpringLayout.NORTH, label2, 0, SpringLayout.NORTH, label3);
//button3
layout3.putConstraint(SpringLayout.WEST, button3, 305, SpringLayout.WEST, p3);
layout3.putConstraint(SpringLayout.NORTH, button3, 0, SpringLayout.NORTH, p3);
//Browser
layout3.putConstraint(SpringLayout.WEST, scrollplog, 0, SpringLayout.WEST, c3);
layout3.putConstraint(SpringLayout.NORTH, scrollplog, 25, SpringLayout.NORTH, c3);
layout3.putConstraint(SpringLayout.EAST, scrollplog, 320, SpringLayout.EAST, c3);
layout3.putConstraint(SpringLayout.SOUTH, scrollplog, 140, SpringLayout.SOUTH, c3);
//FrameLayout
//p1
frmlayout.putConstraint(SpringLayout.WEST, p1,
5,
SpringLayout.WEST, frame);
frmlayout.putConstraint(SpringLayout.NORTH, p1,
5,
SpringLayout.NORTH, frame);
frmlayout.putConstraint(SpringLayout.EAST, p1,
380,
SpringLayout.EAST, frame);
frmlayout.putConstraint(SpringLayout.SOUTH, p1,
50,
SpringLayout.SOUTH, frame);
//p2
frmlayout.putConstraint(SpringLayout.WEST, p2,
5,
SpringLayout.WEST, frame);
frmlayout.putConstraint(SpringLayout.NORTH, p2,
75,
SpringLayout.NORTH, p1);
frmlayout.putConstraint(SpringLayout.EAST, p2,
380,
SpringLayout.EAST, frame);
frmlayout.putConstraint(SpringLayout.SOUTH, p2,
285,
SpringLayout.SOUTH, p1);
//p3
frmlayout.putConstraint(SpringLayout.WEST, p3,
5,
SpringLayout.WEST, frame);
frmlayout.putConstraint(SpringLayout.NORTH, p3,
285,
SpringLayout.NORTH, p2);
frmlayout.putConstraint(SpringLayout.EAST, p3,
380,
SpringLayout.EAST, frame);
frmlayout.putConstraint(SpringLayout.SOUTH, p3,
200,
SpringLayout.SOUTH, p2);
//Display the window.
frame.setSize(400, 600);
initialize();
// frame.pack();
frame.setVisible(true);
}
private static void setPanelsEnabled(boolean b) {
for (int i = 0; i < comp.length; i++)
comp[i].setEnabled(b);
}
private static void initialize() {
try {
emails = new JTextField[]{textBox2, textBox3, textBox4};
textBox1.requestFocus();
setPanelsEnabled(false);
richText.setEditable(false);
log.setEditable(false);
textBox1.setText("enter number here");
} catch (Exception ex) {
System.out.println(c.MSGBOX_EXCEPTION_TITLE + ": " + ex);
}
}
private static void button1_Click() {
try {
label2.setText(textBox1.getText());
_Phone = textBox1.getText();
_args_for_Update = ga.query1(_Phone, c1, c2);
if (_args_for_Update.getUserId() == 0) {
c1.setSelected(false);
c2.setSelected(false);
System.out.println(c.MSGBOX_SEARCH_STATUS_TITLE + ": " + c.MSGBOX_NO_USER_WAS_FOUND);
} else {
richText.setText(_args_for_Update.getUserInfo());
ga.query2(_args_for_Update);
_args_for_Update.setEmailsAmount(ga.fillEmails(_args_for_Update, emails));
}
boolean b = _args_for_Update.getUserId() > 0;
setPanelsEnabled(b);
c3.setSelected(false);
} catch (Exception ex) {
System.out.println(c.MSGBOX_EXCEPTION_TITLE + ": " + ex);
}
}
private static void button2_Click() {
try {
int saveOK = ga.SaveSettings(_args_for_Update, emails, c1, c2);
button1.doClick();
if (saveOK == c.USER_UPDATE_RESULT_0)
System.out.println(c.MSGBOX_EMAIL_CHANGES_STATUS_TITLE + ": " + c.MSGBOX_CANNOT_DELETE_MAIN_EMAIL);
else
System.out.println(c.MSGBOX_USER_STATUS_TITLE + ": " + c.MSGBOX_USER_WAS_SUCCESSFULLY_UPDATED);
} catch (Exception ex) {
System.out.println(c.MSGBOX_EXCEPTION_TITLE + ": " + ex);
}
}
private static void checkBox3_CheckedChanged() {
if (c3.isSelected())
label2.setText(c.FAX_PREFIX_153 + _Phone.substring(1));
else
label2.setText(_Phone);
}
private static void button3_Click() {
try {
// debugging
// log = new Browser().getBrowserWindow(String.format(c.SEND_FAX, ".com")); /////////
log = new JEditorPane(new URL(String.format(c.SEND_FAX, ".com")));
// System.out.println(log.getText());
p3.remove(scrollplog);
scrollplog = new JScrollPane(log); //////////
p3.add(scrollplog, layout3);
scrollplog.repaint();
System.out.println(c.MSGBOX_TEST_FAX_STATUS_TITLE + ": " + c.MSGBOX_FAX_SENDING_IN_PROGRESS);
} catch (Exception ex) {
System.out.println(c.MSGBOX_EXCEPTION_TITLE + ": " + ex);
}
}
public static void main(String[] args) {
try {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
button1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
button1_Click();
}
});
button2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
button2_Click();
}
});
c3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
checkBox3_CheckedChanged();
}
});
button3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
button3_Click();
}
});
createAndShowGUI();
}
});
} catch (Exception e) {
System.out.println(">:)" + e + ">:)");
}
}
}
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评论（1）
Swing 组件的实例化不足以显示它。它必须添加到某种容器（
JFrame、JPanel...）。对于重新初始化同样有效。重新初始化组件后，必须从容器中删除旧版本并添加新版本。Instantiation of a Swing component is not enough to display it. It has to be added to some sort of a container (
JFrame,JPanel...). Same is valid for reinitialization. After having a component reinitialized the old version has to be removed from the container and the new one added.