Hide/Show Password in a JTextFIeld (Java Swing)

Question

So I've been working on a Password Strength Checker and the way it works is that the user enters some random text into a textfield and then instantaneous visual feedback (breakdown of points) is displayed. I've also added a checkbox, which on being selected, should hide the password i.e. replace all the chars with asterisks, while preserving the actual text input by the user. A document listener is being used to keep track of changes inside the textfield. (each char on entry gets analyzed and then scored)

So, my question is, how exactly do I mask the user input with asterisks preserving its original value?

Here's what the GUI looks like:

http://speedcap.net/sharing/screen.php?id=files/51/2f/512f9abb3f92a25add7c593e9d80e9e4.png

score 40 · Accepted Answer · edited Dec 18 '14 at 05:50

40

How exactly do I mask the user input with asterisks preserving its original value?

Use the JPasswordField which has nice function jPasswordField.getPassword(); to get the password as char[] to work with.

Use jPasswordField1.setEchoChar('*') to mask the password characters with *.
If you wish to see the value you are inserting use jPasswordField1.setEchoChar((char)0); Setting a value of 0 indicates that you wish to see the text as it is typed, similar to the behavior of a standard JTextField.

Tutorial and Reference:

edited Dec 18 '14 at 05:50

Eric

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answered Nov 03 '13 at 16:43

Sage

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Set echo character to 0 to disable masking: `jPasswordField1.setEchoChar('\u0000')`. – Hollis Waite Nov 03 '13 at 17:12
@Sage, whenever I click on the hide checkBox, the textfield loses focus, and then I have to click on the textfield again for the changes to take place. I used to function requestFocus on it to regain focus, but it doesn't seem to work. What could I be doing wrong? – Manas Bajaj Nov 03 '13 at 17:39
@EnTHuSiAsTx94, please post another question with a short description, so that i and other experienced people from the community can help you with, it is also preferable to attach a short and simple working example which is able to produce your problem :)\ – Sage Nov 03 '13 at 17:48

score 3 · Answer 2 · answered Apr 11 '18 at 08:13

3

Use Password Field Instead of using textfield

answered Apr 11 '18 at 08:13

Muhammad Aasharib Nawshad

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score 2 · Answer 3 · edited Apr 18 '18 at 12:36

2

ok thanks for tutorialnya,

and ex,

action chechbox / double click

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

   if (lihat.isSelected()) {
      password.setEchoChar((char)0); //password = JPasswordField
   } else {
      password.setEchoChar('*');
   }
}

edited Apr 18 '18 at 12:36

Dumbo

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answered Dec 26 '14 at 06:46

Mahdani Ismail

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Welcome to Stack Overflow! This really seems like a comment, not an answer. With a bit more rep, [you will be able to post comments](http://stackoverflow.com/privileges/comment). – Nathan Tuggy Dec 26 '14 at 06:51

score 1 · Answer 4 · answered Jul 08 '21 at 21:14

1

I solved it as follows:

if ( jPasswordField.getEchoChar() != '\u0000' ) {
    jPasswordField.setEchoChar('\u0000');
} else {
    jPasswordField.setEchoChar((Character) UIManager.get("PasswordField.echoChar"));
}

answered Jul 08 '21 at 21:14

Márcio R. Lima

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Assuming this is not a `JTextField` but a `JPasswordField`. – Frederic Perron Jul 08 '21 at 22:10

Hide/Show Password in a JTextFIeld (Java Swing)

4 Answers4

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