Specific input from user

Question

I started making my own little applet with buttons and labels and text fields, but I want to when you enter a certain thing in the text field it does something. I tried if(fieldTextField.equals(mystringhere)) { but it doesn't work. Could you post an example of what I want?

@NaameNameee do you work for NASA? no, so don't be afraid, noone is stealing your code. — BackSlash, Apr 07 '13 at 09:10

score 0 · Answer 1 · answered Apr 07 '13 at 09:09

Take a look at event listeners (http://docs.oracle.com/javase/tutorial/uiswing/events/intro.html). Also you shouldn't be comparing the TextField itself to the String, but it's text, using the getText() method.

EDIT: Better than the link above: http://docs.oracle.com/javase/tutorial/uiswing/components/textfield.html

BackSlash · Accepted Answer · 2013-04-07T09:43:03.067

0

You have to use a KeyListener, so that you can listen to keyboard and check your text everytime the user types something in your field:

KeyListener kl = new KeyAdapter(){
    public void keyTyped(KeyEvent evt)){
        if(yourTextField.getText().equals(yourString){
            //do something here
        }
    }
};
yourTextField.addKeyListener(kl);

Note that yourTextField must be an instance variable or a local final variable in order to be used in the KeyListener methods

edited Apr 07 '13 at 09:43

answered Apr 07 '13 at 09:22

BackSlash

21,927
22
96
136

make a local **final** variable? – Naame Nameee Apr 07 '13 at 09:29
@NaameNameee Well, if your variable is `field1TextField` it already is an instance variable, so you don't need to make it final. Also, i see that all your GUI components are from java.awt package. When you can, please use javax.swing package, it is much better, there are two links that explain you why swing is better than awt: [link 1](http://stackoverflow.com/questions/408820/what-is-the-difference-between-swing-and-awt) [link 2](http://edn.embarcadero.com/article/26970) – BackSlash Apr 07 '13 at 09:33
my field1TextField is a simple textfield. `TextField field1TextField = new TextField("Insert Text Here");` – Naame Nameee Apr 07 '13 at 09:34
and one more thing, javax.swing? i dont know how to use that. ill post another question about that – Naame Nameee Apr 07 '13 at 09:38
Did you check the two links i gave you? they explain it – BackSlash Apr 07 '13 at 09:39
and you forgot to add an extra ) to your public void – Naame Nameee Apr 07 '13 at 09:40

Specific input from user

2 Answers2