Java – Disabling a button in Netbeans GUI until correct password is put into the password field

javanetbeanspasswordsswinguser-interface

I'm very new at coding, and I want a swing button in the netbeans GUI to stay disabled until the correct password is entered to a password field. I have already created the password field, and given it a correct password.

If you can keep it simple it would be appreciated, as I'm very new to programming in general.

Best Solution

You can make use of setEnabled property,

button.setEnabled(true);

you can set it to false initially , upon validating make it true .

if (text.equals("password"))
   button.setEnabled(false);

As #setEnabled(boolean),

Enables or disables this component, depending on the value of the parameter b. An enabled component can respond to user input and generate events. Components are enabled initially by default.

Related Solutions

Java – GroupLayout: Is it worth learning

I'd say it's worth taking some time to understand GroupLayout if only because it's always a good idea to understand what your IDE is doing. Knowing what goes on behind the scenes actually makes you more flexible, because if you wind up in a situation where you don't have access to Netbeans, you'll know how to replicate the layout it would have produced for you. Besides, after you've gotten a decent amount of experience, you'll probably wind up saving time overall. You can often develop a simple GUI faster by hand than by using a visual editor, especially considering the time it takes you to copy and paste the code from Netbeans to Eclipse.

And of course, learning how to use GroupLayout by hand will also make it easier for you to transition to any of the other layout managers Java offers, which in turn can lead to simpler code and even more time saved.

Java – Using the NetBeans GUI editor, how can I create a JTextField or JFormattedText field that must be validated against a regular expression

Open the Properties of your JTextField, in the Properties tab look for inputVerifier. Open it

Now you'll be asked to introduce the InputVerifier code.

ftf2.setInputVerifier(new InputVerifier() {
  public boolean verifyText(String textToVerify) {
     Pattern p = Pattern.compile("your regexp");
     Matcher m = p.matcher(textToVerify);
        if (m.matches()) {
        setComponentValue(textToVerify);
        return true;
    }
    else {
        return false;
    }

  }
});

I haven't compiled this code, so could contain errors. But I think you get the idea ;)

Best Solution

Related Solutions

Java – GroupLayout: Is it worth learning

Java – Using the NetBeans GUI editor, how can I create a JTextField or JFormattedText field that must be validated against a regular expression

Related Question