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String phoneNumber = JOptionPane . showinputDialog ( What is your phone number?); while(phoneNumber.length) !- 10) JOptionPane.showMessageDialog(null, phoneNumber + is invalid, please enter a valid 10 digit n String phoneNumberJOptionPane.showInputDialog(What is your phone number?); JOptionPane.showMessageDialog(null, nameIn +jerseyNumber +In + phoneNumber);How do i allow the format xxx-xxx-xxxx?

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Answer #1

import java.util.regex.Pattern;

import javax.swing.JOptionPane;

public class Test{

public static void main(String args[]) {

while(true){

String phoneNumber = JOptionPane.showInputDialog("What is your phone number ?");

if((Pattern.matches("[0-9]{3}-[0-9]{3}-[0-9]{4}", phoneNumber)))

break;

else

JOptionPane.showMessageDialog(null, phoneNumber + " is invalid," + " please enter a valid 10 digit number");

}

}

}

Here i used regex to allow the format xxx-xxx-xxxx. Please check the bold statement in the code.

Let me know if you have any queries or clarifications.... :)

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