CODEWITHSUNDEEP
javanetbeanstextboxnumbers
Brownman Revival
Brownman Revival

Reputation: 3850

input in text field only number in java application

DishFormPanelistIdLbl.setText("Panelist ID:");

        DishFormPanelistIdTxt.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                DishFormPanelistIdTxtActionPerformed(evt);
            }
        });

I have here a text label and text field for ID i want to input only numbers in text how is it possible?been trying the sample program un net beans but they dont have such a solution for this problem any help is appreciated

"Update"

What i want here is when i type letter nothing will show but when number then it will show

Upvotes: 1

Views: 24501

Answers (2)

Brownman Revival
Brownman Revival

Reputation: 3850

What i did is in the design mode i right click the text field > Events > Key > KeyTyped

then in the code i hade something like this 

private void DishFormPanelistIdTxtKeyTyped(java.awt.event.KeyEvent evt) {                                               
        // TODO add your handling code here:
        char enter = evt.getKeyChar();
        if(!(Character.isDigit(enter))){
            evt.consume();
        }
    }

i didnt get the solution here in stack but i will link it this is the link

Upvotes: 6

Vince
Vince

Reputation: 15146

You could do this by using a JFormattedTextField. It's pretty straight forward: you pass it a formatter (which extends AbstractFormatter), and the formatter will allow you to restrict and modify how things are displayed in your field. In this case, you could use the pre-made formatter NumberFormatter:

NumberFormatter formatter = new NumberFormatter(); //create the formatter
formatter.setAllowsInvalid(false); //must specify that invalid chars are not allowed

JFormattedTextField field = new JFormattedTextField(formatter); //pass the formatter to the field

This will also add a comma where ever needed (for example, when you type in 1000, it'll display it as 1,000.

Upvotes: 3

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