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How do we retrieve value from a textfield and actionPerformed()? I need the value to be converted into String for further processing. I have created a textfield on clicking a button I need to store the value entered into a String can you please provide a code snippet?

e-sushi
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harshini
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    Did you try reading the javadoc? – Stephen C Apr 22 '11 at 04:37
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    It is a duplicate. Maybe not of a single question. But this is not a new problem. [Getting text](http://stackoverflow.com/questions/3885577/retrieve-jtextfield-text-value) & [Adding action listener](http://stackoverflow.com/questions/4062195/adding-an-action-listener-to-a-jcombobox). Plus I am sure if you would google it there is even an example for what you describe. – Boro Apr 22 '11 at 06:21
  • Its very easy to get value from JTextfield.. try to read java doc........it will help you to develop programs.. – Chetan Jan 30 '15 at 08:57

7 Answers7

70
testField.getText()

See the java doc for JTextField

Sample code can be:

button.addActionListener(new ActionListener(){
   public void actionPerformed(ActionEvent ae){
      String textFieldValue = testField.getText();
      // .... do some operation on value ...
   }
})
Harry Joy
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10
* First we declare JTextField like this

 JTextField  testField = new JTextField(10);

* We can get textfield value in String like this on any button click event.

button.addActionListener(new ActionListener(){
   public void actionPerformed(ActionEvent ae){
      String getValue = testField.getText()

   }
})
Chetan
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8

How do we retrieve a value from a text field?

mytestField.getText();

ActionListner example: 

mytextField.addActionListener(this);

public void actionPerformed(ActionEvent evt) {
    String text = textField.getText();
    textArea.append(text + newline);
    textField.selectAll();
}
trashgod
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Nirmal- thInk beYond
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4

What I found helpful is this condition that is below.

String tempEmail = "";
JTextField tf1 = new JTextField();

tf1.addKeyListener(new KeyAdapter(){
    public void keyTyped(KeyEvent evt){
         tempEmail = ((JTextField)evt.getSource()).getText() + String.valueOf(evt.getKeyChar());
    }
});
Nathan Tuggy
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ArifMustafa
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  • There is one problem: the control keys. they will get printed as soon as you hit them. For example, CONTROL, ALT, BACK, etc. All those keys will get printed in your string. – Mesabloo May 13 '18 at 10:40
4
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Swingtest extends JFrame implements ActionListener
{
    JTextField txtdata;
    JButton calbtn = new JButton("Calculate");

    public Swingtest()
    {
        JPanel myPanel = new JPanel();
        add(myPanel);
        myPanel.setLayout(new GridLayout(3, 2));
        myPanel.add(calbtn);
        calbtn.addActionListener(this);
        txtdata = new JTextField();
        myPanel.add(txtdata);
    }

    public void actionPerformed(ActionEvent e)
    {
        if (e.getSource() == calbtn) {
            String data = txtdata.getText(); //perform your operation
            System.out.println(data);
        }
    }

    public static void main(String args[])
    {
        Swingtest g = new Swingtest();
        g.setLocation(10, 10);
        g.setSize(300, 300);
        g.setVisible(true);
    }
}

now its working

Francisco Barra Sepulveda
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jayesh
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  • Reformatted code; please revert if incorrect. Unfortunately, this does not compile. – trashgod Apr 22 '11 at 06:28
  • Please don't shout; it makes you sound angry. Even ignoring the missing imports, it looks like you're missing the constructor. Can I help you fix it? – trashgod Apr 22 '11 at 06:57
  • you understand how to get value from text box so its ok – jayesh Apr 22 '11 at 07:04
  • No, this is worse; I'm trying to help improve this answer. You appear to be declaring `class serverfact` and instantiating something named `VIEWBTN`. Neither name uses a style with which I am familiar. – trashgod Apr 22 '11 at 07:12
  • haha ... that's cool, commanding the upvote ;-) BTW: you should stick to java naming conventions – kleopatra Apr 22 '11 at 10:20
  • @kleopatra is right about the naming conventions: they improve readability, e.g. `class ServerFact` or `JTextField resText`. I previously down-voted this answer because it was misleading; it is correct now, so I have reversed the vote. I'm not sure it adds anything to prior answers, but I defer to @harshini on whether it is useful. I'd be happy to examine other answers you have proposed. I can't promise an up-vote, but I can promise honest, constructive review. – trashgod Apr 22 '11 at 11:12
2

Just use event.getSource() frim within actionPerformed

Cast it to the component

for Ex, if you need combobox

JComboBox comboBox = (JComboBox) event.getSource();
JTextField txtField = (JTextField) event.getSource();

use appropriate api to get the value,

for Ex.

Object selected = comboBox.getSelectedItem();  etc.
Andrey Korneyev
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Anuj Singh
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0

You can use the getText() method anywhere in your code it is instancely called by your object, So you can use the method anywhere within a calass

Melvin Infant
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