Question

FOR JAVA

Write a main method that will request the user to enter Strings using a JOptionPane input dialog. The method should continue accepting strings until the user types “STOP”. Then, using a JOptionPane message dialog, tell the user how many of the strings begin and end with a digit.

Answer 1

import javax.swing.*;

public class CountDigitStrings {

public static void main(String[] args) {

String str = "", res;

int endIndex, count = 0;

char firstCh, lastCh;

while(!str.equalsIgnoreCase("stop")) {

str = JOptionPane.showInputDialog("Enter String: ");

endIndex = str.length() - 1;

firstCh = str.charAt(0);

lastCh = str.charAt(endIndex);

if(Character.isDigit(firstCh) && Character.isDigit(lastCh)) {

count++;

}

}

res = "The total number of string(s) which starts and ends with a digit are " + count;

JOptionPane.showMessageDialog(null, res);

}

}