对话框的文本怎么提取到框架的文本区中 在对话框中访问不了框架的文本区,所以不能对文本区的内容进行更新。 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 思想是:通过对话框输入user类的name和password域,并提取到对话框所属框架中的文本域输出。但是我在编辑对话框类中对话框的按钮响应事件时在ActionListener中的actionPerformed(ActionEvent e)不可以访问框架类的文本域。import java.awt.BorderLayout;import java.awt.EventQueue;import java.awt.GridLayout;import java.awt.Label;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.*;public class dialogdataexchange { public static void main(String[] args) { // TODO 自动生成方法存根 EventQueue.invokeLater(new Runnable() { public void run() { // TODO 自动生成方法存根 DialogFrame dframe=new DialogFrame(); dframe.setSize(200,200); dframe.setVisible(true); } }); }}class DialogFrame extends JFrame{ public DialogFrame() { // TODO 自动生成构造函数存根 JMenuBar bar=new JMenuBar(); setJMenuBar(bar); JMenu help=new JMenu("help"); JMenuItem about=new JMenuItem("about"); JMenuItem exit=new JMenuItem("exit"); ; about.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { if(dialog==null) dialog=new Dialogclass(DialogFrame.this); dialog.setVisible(true); } }); exit.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { // TODO 自动生成方法存根 System.exit(0); } }); help.add(about); help.add(exit); bar.add(help); add(info,BorderLayout.CENTER); } public JTextArea info=new JTextArea("text:\n"); private Dialogclass dialog; }class Dialogclass extends JDialog{ public Dialogclass(JFrame owner) { super(owner,"the dialog test",true); //panel JPanel panel1=new JPanel(); panel1.setLayout(new GridLayout(2,2)); panel1.add(new Label("name:")); final JTextField nametext=new JTextField(); panel1.add(nametext); panel1.add(new Label("password")); final JTextField passwordtext=new JTextField(); panel1.add(passwordtext); add(panel1,BorderLayout.CENTER); //panel2 JButton insert=new JButton("insert"); insert.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { String name=new String(nametext.getText()); char[] password=passwordtext.getText().toCharArray(); user u=new user(name,password); System.out.println("name:"+name+" password:"+new String(password)); nametext.setText(""); passwordtext.setText(""); } }); JButton close=new JButton("close"); close.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { setVisible(false); } }); JPanel p=new JPanel(); p.setLayout(new GridLayout(1,2)); p.add(close); p.add(insert); add(p,BorderLayout.SOUTH); setSize(200,200);}}class user{public user(String name,char[] password) { this.name=name; this.password=password; }public String getName() { return name;}public void setName(String name) { this.name = name;}public char[] getPassword() { return password;}public void setPassword(char[] password) { this.password = password;}String name;char[] password;} join是干什么用的? 剪刀石头布的游戏,哪个高手帮帮看能优化不?? itext 解析 pdf 我是新手,看了代码,请大家别笑我傻 如何使用数组来得到查询的结果 ,急求! JTree图标变换问题,急求 我用JAWIN实现JAVA与VC OCX,但是出现异常,想大家看看帮帮忙 如何移动JTextArea里面的光标? 图片上的手机号怎么识别 请问运行serverlet需要装什么软件??? JFrame设置的图标不能显示? 一个字符串题
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.Label;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;import javax.swing.*;public class dialogdataexchange {
public static void main(String[] args) {
// TODO 自动生成方法存根
EventQueue.invokeLater(new Runnable()
{
public void run() {
// TODO 自动生成方法存根
DialogFrame dframe=new DialogFrame();
dframe.setSize(200,200);
dframe.setVisible(true);
}
}); }}
class DialogFrame extends JFrame{
public DialogFrame() {
// TODO 自动生成构造函数存根
JMenuBar bar=new JMenuBar();
setJMenuBar(bar);
JMenu help=new JMenu("help");
JMenuItem about=new JMenuItem("about");
JMenuItem exit=new JMenuItem("exit");
;
about.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
if(dialog==null)
dialog=new Dialogclass(DialogFrame.this);
dialog.setVisible(true);
}
});
exit.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO 自动生成方法存根
System.exit(0);
}
});
help.add(about);
help.add(exit);
bar.add(help);
add(info,BorderLayout.CENTER);
}
public JTextArea info=new JTextArea("text:\n");
private Dialogclass dialog;
}class Dialogclass extends JDialog
{
public Dialogclass(JFrame owner) {
super(owner,"the dialog test",true);
//panel
JPanel panel1=new JPanel();
panel1.setLayout(new GridLayout(2,2));
panel1.add(new Label("name:"));
final JTextField nametext=new JTextField();
panel1.add(nametext);
panel1.add(new Label("password"));
final JTextField passwordtext=new JTextField();
panel1.add(passwordtext);
add(panel1,BorderLayout.CENTER);
//panel2
JButton insert=new JButton("insert");
insert.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e) {
String name=new String(nametext.getText());
char[] password=passwordtext.getText().toCharArray();
user u=new user(name,password);
System.out.println("name:"+name+" password:"+new String(password));
nametext.setText("");
passwordtext.setText("");
}
});
JButton close=new JButton("close");
close.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
setVisible(false);
}
});
JPanel p=new JPanel();
p.setLayout(new GridLayout(1,2));
p.add(close);
p.add(insert);
add(p,BorderLayout.SOUTH);
setSize(200,200);
}
}
class user
{
public user(String name,char[] password) {
this.name=name;
this.password=password;
}public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public char[] getPassword() {
return password;
}
public void setPassword(char[] password) {
this.password = password;
}
String name;
char[] password;
}