Ask about JPasswordfield

[yonghan]

Hi all,i'm using netbeans with ubuntu.I got a problem,i use a jtextfield and a jpaswordfield,when i run the program,jtextfield is ok,but whne i want to edit the jpasswordfield,it can't be edited,unless i've click a button displaying messages,then the jpasswordfield can be edited..What should i do?Thanks a lot..

[serjant]

Can you provide the cod please,actually it should be this way:

JPasswordField passwordField = new JPasswordField(10);
passwordField.addActionListener(this);

you can try this demo JNLP application with JPasswordField
PasswordDemo
and the code for it is:
PasswordDemo.java

[yonghan]

I use netbeans,i didn't edit the code for the jpasswordfield..When i delete the jtextfield,the jpasswordfield can be edited immediately.

[Fubarable]

My recommendation, and you're not going to like it: avoid using NetBeans to generate your Swing code and code it by hand. It's not hard to do, and in the process, you'll learn much more about Swing.

[Eranga]

My recommendation, and you're not going to like it: avoid using NetBeans to generate your Swing code and code it by hand. It's not hard to do, and in the process, you'll learn much more about Swing.

This is really nice advice for newbies, on swing specially. When you have better idea on such things better to move with Java IDE.

Back to the original question, can you post a code segment to see what you have exactly done. I hope it's not clear what you have done for most of the members.

[yonghan]

I'm confused..Last night i try,there's no problem..I can directly edit the password,but just now it doesn't works again..

private void btCancelActionPerformed(java.awt.event.ActionEvent evt)
{
System.exit(0);
}

private void btLoginActionPerformed(java.awt.event.ActionEvent evt)
{
try
{char[] pwd = txtPwd.getPassword();
StringBuffer str = new StringBuffer();for (int i=0;i<pwd.length;i++)
{
str.append(pwd[i]);
}
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(str.toString().getBytes(),0,str.length() );
String pass = new BigInteger(1,md.digest()).toString(16);
javax.persistence.Query query=ent.createQuery("select d from DataUser d where d.usrname=:name and d.pwd= :pwd");
query.setParameter("name",txtUser.getText());
query.setParameter("pwd", pass);
DataUser d =(DataUser) query.getSingleResult();
this.setVisible(false);this.dispose();new MainFrm().setVisible(true);
}
catch (Exception exception)
{
JOptionPane.showMessageDialog(null, exception.getMessage());
}
}

[Norm]

,it can't be edited,unless i've click a button

private void btLoginActionPerformed(java.awt.event.ActionEvent evt)
{

Your code in the above method appears to be called when a button is pressed. You don't show the addActionListener() call but the method name and args make it look like an actionListener. So its only called when the button is pressed.
What do you want to change?

[yonghan]

I don't want to change anything Norm..It just that i don't know why that the jpasswordfield that i put in the login form using netbeans are unabled to be edited on the runtime,unless i click the login button first,then back to edit the jpasswordfield....I'm using ubuntu,does it concern with it?Thansk a lot..