Question

Numbers with embedded dashes play a huge role in our lives. Think of your phone number or Social Security number. Write a program that uses a Scanner to take a single line of user input. You may assume this input consists of any number of characters and contains zero, one or two dashes. Use only String's indexOf, lastIndexOf, and substring methods. Sample input might be

123-45-6789

or

919-555-1212

or

hare-brained

Your program should remove the dashes and print the digits. The output for the above input would be

123456789

and

9195551212

and

harebrained

Program must haves:

• Program uses only indexOf, lastIndexOf and substring methods
• Program works with any string containing at most two dashes
• Program uses nextLine to read user input
• Program prints the user input with dashes removed

Answer 1

import java.util.*;
public class MyClass {
public static void main(String args[]) {
Scanner in=new Scanner(System.in);
String str;
System.out.println("User Input: ");
str=in.nextLine();
int indx1=str.indexOf("-");
int indx2=str.lastIndexOf("-");
String res="";
  
  
if(indx1==indx2)
{
res=str.substring(0, indx1)+str.substring(indx2+1);
}
else
{
res=str.substring(0, indx1)+str.substring(indx1+1, indx2)+str.substring(indx2+1);
}
  
System.out.println(res);
  
  
}
}