import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JTextDem extends JFrame
{ public JTextField uid_text;
public JPasswordField pwd_text;
//////////////////////////////////////////////////////////
public void JTextDemo()
{ Container c = getContentPane();
c.setLayout(new FlowLayout());
c.setSize(200,200);
JLabel uid_label=new JLabel("user");
JLabel pwd_label=new JLabel("pwd");
uid_text=new JTextField(15);
pwd_text=new JPasswordField(15);
JButton button1=new JButton("ok");
button1.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
showText();
}
});
JButton button2=new JButton("cancal");
button2.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
System.exit(0);
}
});
/////////////////////////////////////////////////////////////
c.add(uid_label);
c.add(pwd_label);
c.add(uid_text);
c.add(pwd_text);
c.add(button2);
c.add(button1);
setVisible(true);
}private void showText()
{
String uid,pwd;
uid=uid_text.getText();
JOptionPane.showMessageDialog(this.getParent(),"hello");
}
public static void main(String args[])
{
JTextDem test = new JTextDemo();
}
}
import java.awt.event.*;
import javax.swing.*;
public class JTextDem extends JFrame
{ public JTextField uid_text;
public JPasswordField pwd_text;
//////////////////////////////////////////////////////////
public void JTextDemo()
{ Container c = getContentPane();
c.setLayout(new FlowLayout());
c.setSize(200,200);
JLabel uid_label=new JLabel("user");
JLabel pwd_label=new JLabel("pwd");
uid_text=new JTextField(15);
pwd_text=new JPasswordField(15);
JButton button1=new JButton("ok");
button1.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
showText();
}
});
JButton button2=new JButton("cancal");
button2.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
System.exit(0);
}
});
/////////////////////////////////////////////////////////////
c.add(uid_label);
c.add(pwd_label);
c.add(uid_text);
c.add(pwd_text);
c.add(button2);
c.add(button1);
setVisible(true);
}private void showText()
{
String uid,pwd;
uid=uid_text.getText();
JOptionPane.showMessageDialog(this.getParent(),"hello");
}
public static void main(String args[])
{
JTextDem test = new JTextDemo();
}
}
public static void main(String args[])
{
JTextDem test = new JTextDemo(); //
test.show();
}
类名是JTextDem ,你又new JTextDemo 呵呵 还有加上test.show();才能显示
JTextDem test = new JTextDemo()------>JTextDemo test = new JTextDemo()------>