JTextField restrict number of characters

Hello,
Can anyone tell me how to restrict the number of characters that a JTextField can have?
In my username field I want the user to be able to only insert 10 characters, not more.
In my password field I want the user to be able to only insert 8 charatcers, not more, not less.
i hope i made myself clear.
thanks

read this: [http://java.sun.com/docs/books/tutorial/uiswing/components/formattedtextfield.html]
and this: [http://java.sun.com/docs/books/tutorial/uiswing/misc/focus.html#inputVerification]

Similar Messages

How to restrict number of characters for an input field

Hi All,
I have an input field.
The max number of characters for this input field is 10.
when a user enter more then 10 characters. it should prompt for an error or the input field should not allow to accpet the 11 character.
how we do this in VC.
need your helpful answers
Rgds
Srinivas

Hi Srinu
You could achieve this by configuring error messages under the formula:-
Select the control properties and in the Input field at the Display tab write the formula
"IF((@<LEN(text)>10),'appropriate message','Records available')"
Note :- there is a LEN(text) under text functions in formula tab.
Regards
Navneet
Message was edited by:
Navneet Giria

Restrict number of characters in table field for select statement.

SELECT * FROM table
                WHERE column1 = z-column.
The field column1 is of type char and size 20
The field z-column is of type char size 10.
how do we perform this select?
Anyone can guide me?
Edited by: Hadesfx on Sep 11, 2009 3:56 PM
Edited by: Hadesfx on Sep 11, 2009 3:59 PM

Hello,
In your OP did you mention this? Please be specific when you post the next time.
Can you please post your code?
I think you have to try a work around:
DATA:
RS_STOCKID TYPE SELOPT,
RT_STOCKID TYPE STANDARD TABLE OF SELOPT.
LOOP AT GT_ZB1PUT_STOCKTMP.
RS_STOCKID-SIGN = 'I'.
RS_STOCKID-OPTION = 'EQ'.
RS_STOCKID-LOW = GT_ZB1PUT_STOCKTMP-STOCKID.
APPEND RS_STOCKID TO RT_STOCKID.
CLEAR RS_STOCKID.
ENDLOOP.
You can use this RANGE table to SELECT data from the table.
SELECT * FROM zb1xxt_param
            FOR ALL ENTRIES IN gt_zb1put_stocktmp[]
            WHERE zzcode    = 'DEV036'
            AND   zzdomain = 'SD'
            AND   zzdata    = 'INBOUND'
            AND   zzinput1 = 'STOCKID'
            AND   zzinput2 IN RT_STOCKID. "Use RT_STOCKID for SELECT'ing data
BR,
Suhas

Restricting user to input a maximum number of characters in a JTable cloumn

Hi all,
I'me developing a program which should restrict the user with a maximum number of characters input in a JTable column. It should show a msg and restrict the user from typing in, if the number of characters exceed the limit and on clicking cancel it should revert back the changes made to the field.
Can anybody please help me?
Thanks in advance,
Amol

Hi,
Try to write your own cell editor.
There attach an InputVerifier to the JTextField of the editing cell.
The input verifier can watch for the size of the input and if too many characters you can show a JOptionPane.Dialog.
Olek

How do I limit number of characters in a JTextField?(different from others)

Hi,
I know this question has been posted several times on this forum, but my question is actually a different one. So please read.
I have the following code that puts two JTextFields in a JFrame. I want to limit the number of characters in the first JTextField to three characters. What's different about my question from other solutions provided, is that I don't want to be able to type more than three characters in the JTextField, and then not be able to get out of JTextField unless I have three or less characters. What I do want, is to have maximum of three characters, not be able to type the fourth, and have access to the other JTextField at all times.
I have tried the following solution of setting an InputVerifier to my JTextField, but it hasn't worked, since I can still type the fourth character.
Looking forward to your help!
Thanks.
import java.awt.Dimension;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.InputVerifier;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class TextFieldVerifier {
     public TextFieldVerifier()
          JFrame frame = new JFrame("My TextVerifier");
          JPanel panel = new JPanel();
          JLabel firstTextFieldLabel = new JLabel("First: ");
          JLabel secondTextFieldLabel = new JLabel("Second: ");
          final JTextField myTextField = new JTextField();
          myTextField.setPreferredSize(new Dimension(100,20));
          myTextField.setInputVerifier(new InputVerifier()
               public boolean verify(JComponent input) {
                    if(myTextField.getText().length()<=3)
                         return true;
                    else
                        return false;
          myTextField.addKeyListener(new KeyAdapter()
               public void keyTyped(KeyEvent e)
                    if(!myTextField.getInputVerifier().verify(myTextField))
                         myTextField.setText(myTextField.getText().substring(0, myTextField.getText().length()-1));
          JTextField secondTextField = new JTextField();
          secondTextField.setPreferredSize(new Dimension(100,20));
          panel.add(firstTextFieldLabel);
          panel.add(myTextField);
          panel.add(secondTextFieldLabel);
          panel.add(secondTextField);
          frame.getContentPane().add(panel);
          frame.setSize(new Dimension(200,100));
          frame.setVisible(true);
     public static void main (String [] args)
          TextFieldVerifier v = new TextFieldVerifier();
}

Thanks, JayDS! Your suggestion worked. And I've come up with the following code with help of your suggestion. However, I'm not happy with the fact that I see empty spaces in my JFormattedTextField when I don't have anything entered in it, or when my textfield has focus and I click it again. Also, I'd like the text alignment to always stay on the right, even if I have less than 3 digits.
Could you please help me out with that?
Thanks!
import java.awt.Dimension;
import java.text.ParseException;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.text.MaskFormatter;
public class TextFieldVerifier {
     public TextFieldVerifier()
          JFrame frame = new JFrame("My TextVerifier");
          JPanel panel = new JPanel();
          JLabel firstTextFieldLabel = new JLabel("First: ");
          JLabel secondTextFieldLabel = new JLabel("Second: ");
          try{
               VariableLengthMaskFormatter formatter = new VariableLengthMaskFormatter("###");
               final JFormattedTextField myTextField = new JFormattedTextField(formatter);
               myTextField.setHorizontalAlignment(JTextField.RIGHT);
               myTextField.setPreferredSize(new Dimension(100,20));
               panel.add(firstTextFieldLabel);
               panel.add(myTextField);
          } catch (ParseException ex) {
               ex.printStackTrace();
          JTextField secondTextField = new JTextField();
          secondTextField.setPreferredSize(new Dimension(100,20));
          panel.add(secondTextFieldLabel);
          panel.add(secondTextField);
          frame.getContentPane().add(panel);
          frame.setSize(new Dimension(200,100));
          frame.setVisible(true);
     protected MaskFormatter createFormatter(String s) {
         MaskFormatter formatter = null;
         try {
              formatter = new MaskFormatter(s);
         } catch (java.text.ParseException exc) {
             System.err.println("formatter is bad: " + exc.getMessage());
             System.exit(-1);
         return formatter;
     public static void main (String [] args)
          TextFieldVerifier v = new TextFieldVerifier();
}Edited by: programmer_girl on Mar 10, 2008 11:10 PM

To restrict the number of characters in the Paragraph text box

Hi Experts,
I have created a custom container on my screen using module pool programming.
Here I need to restrict the number of characters to be entered to 250.
Please tell me how to restrict the number of characters.
Sharon

Hi Rich,
I'm also facing the same problem; when i'm trying to use this method LIMIT_TEXT than i'm getting error saying that this method is protected or private. Please let me know how to access the protected method in this case. Code pertaining to this will be very helpful.
Thanks & Regards,
Megha

Limit number of characters in a JTextField

Now I know that this question has been asked very often but the answers that have been given do not always work. According to other posts you can either use a KeyListener or a DocumentListener. The problem with the code that I have seen using a KeyListener is that you can't use the backspace key when the limit is reached. I am using a JTextField and all the answers dealing with Documents use a JTextArea and I can't figure out how to get it to work with JTextField. I don't understand why the Swing package just didn't come out with a method or cunstructor for these components to limit the number of characters. It would simplify things a lot. I need a JTextField to allow only 25 characters and allow backspaces. Thanks

Here is the code that I am using. It seems to be working somewhat. The only problem now is that when you type the 26th key that new key overwrites what is in the 25th position. Is this the correct way of doing it and if so how do I get it to quit adding in the key that was just pressed?
user_box.addKeyListener(new KeyAdapter() {
    public void keyPressed(KeyEvent e) {
     if((user_box.getText().length() > 24)&&(e.getKeyCode() != KeyEvent.VK_BACK_SPACE)) {
//     System.out.println(e.getKeyCode());
     e.consume();
     try {
          user_box.setText(user_box.getText(0,24));
     }catch(Exception ex) {}
     Toolkit kit = Toolkit.getDefaultToolkit();
     kit.beep(); //system beep
});

How to limit the number of characters entered in a JTextfield???

Hello there,
I have created a Text box using swing component JTextField and I want to limit the number of characters entered to 8 characters..how do i proceed with that?
Thanks in advance!
Joe

Ty out this
import com.sun.java.swing.text.*;
//import javax.swing.text.*;
public class JTextFieldLimit extends PlainDocument {
private int limit;
// optional uppercase conversion
private boolean toUppercase = false;
JTextFieldLimit(int limit) {
super();
this.limit = limit;
JTextFieldLimit(int limit, boolean upper) {
super();
this.limit = limit;
toUppercase = upper;
public void insertString
(int offset, String str, AttributeSet attr)
throws BadLocationException {
if (str == null) return;
if ((getLength() + str.length()) <= limit) {
if (toUppercase) str = str.toUpperCase();
super.insertString(offset, str, attr);
import java.awt.*;
import com.sun.java.swing.*;
//import javax.swing.*;
public class tswing extends JApplet{
JTextField textfield1;
JLabel label1;
public void init() {
getContentPane().setLayout(new FlowLayout());
label1 = new JLabel("max 10 chars");
textfield1 = new JTextField(15);
getContentPane().add(label1);
getContentPane().add(textfield1);
textfield1.setDocument
(new JTextFieldLimit(10));

Limiting the number of characters in a JTextField

Hi I have 6 textfields and I don't want the user to enter more than 160 characters in a tet box. As soon as he reaches that limit, it shouldn't accept any more characters, how do I do this?
One more thing, incase I register 5 textboxes to listen to the same event, how do I make out which textbox generated the event?
Thanks

The event generated from the textboxes has a method e.getSource() check that.
To limit the number of characters extend PlainDocument and override insertString(...) and check the text size if the old size plus text to be inserted < your limit call super.insertString(..) else return.

How to increase the number of characters in Text Edit??

Hi,
How to increase the number of characters we enter in the Text Edit, for example i can't enter not more than 255 characters. If to enter upto 500 char, what to do.
Thanks and regards,
Karthik

We can't restrict the number of characters a UI element can take. Rows and columns properties are to specify the visible no of rows and columns.
If u want a restriction in the number of characters you have to create a simple type and set it to a context attribute and then map it to the text view.

Number of characters in long text functionality

Can anyone please help me as to how many characters are there in long text functionality in Standard SAP. If we create a document under FB01 , there is a long text field how many characters we can enter in that text field.
Also can we have any number of characters in custom field or is there any restriction to it.

Hi Isha,
Please refer the solution for your problem on this link :
Here i have explained in detail how you can go about with providing Custom Controls on the screen.
[Re: long text in custom screen]
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Regards,
Samreen.

Any settings for max. number of characters in DD?

Hello
I am keeping a drop-down field on my interactive form and am setting "Allow user input his/her own value in it".
But, i want to restrict end-user to enter a specified number of characters, we hv the same ability to specify for text fields.
Do we hv any such option of specifying MAXIMUM NUMBER OF CHARACTERS in the drop-down field?
Thaknk yoo

Thank you.
I copied and pasted the below code at CHANGE event of that specific field (COUNTRY drop-down), but,am getting error/red ribbon on Java Script, pls. let me know the correct syntax,
if (xfa.event.newText > 999) {
xfa.event.change = "";
Regards

How to set number of characters in input field ?

I am creating an input field dynamically (via CL_WD_INPUT_FIELD).
I am binding the value (via BIND_VALUE) to an attribute with type CHAR30.
I want to give the possibility to enter a number with 4 digits (0 - 9999).
Is it possible to restrict the number of characters that can be entered to 4 (although the BIND_VALUE attribute has a type CHAR30, that allows 30)?
I have tried it via set_length, bind_length but it seems that the length of the BIND_VALUE attribute overrules the length information...

Hi Moritz,
AFAIk you have no other option as using a NUM4 here.
Set Length just sets the lengths of the inputfield according to the current character set ... count of charcters but does not limit the value you may enter
Cheers
Sascha

Why is bridge reducing number of characters in keywords in IPTC?

I have a lot of photos tagged with keywords and titles in Windows explorer. I am trying to somehow convert these to IPTC format. I had been told that bridge could do this but need some help.
Firstly what is the easiest way to make the IPTC data stick to the photos, do I need to open each one and save the file individuallly? I have tried doing a batch rename but when i open the photos in another piece of software i have it seems the IPTC keywords have been restricted t a small number of characters. Is bridge doing this? Is there a character limit in IPTC?

See answer in this thread in post #2. http://forums.adobe.com/thread/544918;jsessionid=6A1F8C7464640A9CE95D1B66951A5B38.node0?ts tart=0

How To Restrict Number Of Rows For Multiple Group In Report Output

Hi ,
I have a requirement to restrict number of rows in report output.I have three different group , if i use same no of rows to restrict then output is as expected but if i want Deduction group should have 7 rows , earning should have 5 rows and Tax group have 3 rows in report output then XML tag is not working.
Below is the XML tag i am using -
First i have declare the variable to restrict the rows -
<xsl:variable name="lpp" select="number(7)"/>
<xsl:variable name="lpp1" select="number(5)"/>
<xsl:variable name="lpp2" select="number(3)"/>
For Each -
<?for-each:PAYSLIP?>
<xsl:variable xdofo:ctx="incontext" name="DedLines" select=".//AC_DEDUCTIONS"/>
<xsl:variable xdofo:ctx="incontext" name="EarLines" select=".//AC_EARNINGS[ELEMENT_CLASSIFICATION!='Taxable Benefits']"/>
<xsl:variable xdofo:ctx="incontext" name="EarTaxLines" select=".//AC_EARNINGS[ELEMENT_CLASSIFICATION='Taxable Benefits']>
<?for-each:$DedLines?><?if:(position()-1) mod $lpp=0?> <xsl:variable name="start" xdofo:ctx="incontext" select="position()"/>
<?if:(position()-1) mod $lpp1=0?><xsl:variable name="start1" xdofo:ctx="incontext" select="position()"/
<?if:(position()-1) mod $lpp2=0?><xsl:variable name="start2" xdofo:ctx="incontext" select="position()"/>
Report output is tabular form (one page has two column - Earning and Deduction ) . Tax group comes below earning group.
Deduction Group -
<?for-each-group:$DedLines;./REPORTING_NAME?><?if:position()>=$start and position()<$start+$lpp?>
<?REPORTING_NAME?>
<?end if?><?end for-each-group?>
Earning Group -
<?for-each-group:$EarLines;./REPORTING_NAME?><?if:position()>=$start1 and position()<$start1+$lpp1?>
<?REPORTING_NAME?>
<?end if?><?end for-each-group?>
Tax Group -
<?for-each-group:$EarTaxLines;./REPORTING_NAME?><?if:position()>=$start2 and position()<$start2+$lpp2?>
<?REPORTING_NAME?>
<?end if?><?end for-each-group?>
Please let me know in case additional detail is require.
Thanks in Advance.
Thanks,
Harsh
Edited by: Harsh.rkg on Jan 14, 2013 9:43 PM

variable lpp2 is declare to restrict EarTaxLines -
<xsl:variable name="lpp2" select="number(2)"/>
This will help to restrict the no of rows on one page , if we have more then two tax benefits line then layout will roll over to continuation page.
As part of report output my expectation is if i restrict Earning , Deduction and Tax benefits to same no of line for example - variable lpp ,lpp1 and lpp2 have same value "number(2)" , we can see the layout is continue on next page (restrict every group can have max two lines) .This is the reason we have 4 header grid , deduction and Tax Benefit lines are rolled over to continuation page .But if we restrict different value for each variable then continuation page layout is missing .
When we tried for <xsl:variable name="lpp2" select="number(3)"/> value continuation page layout is not getting generate for both employee number .

JTextField restrict number of characters

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