Question

Hello, I need to come up with the java code for a program that looks at bank Account ID's and checks if it is in the frame work of Letter followed by 4 numbers, so for example "A001". I need it to be its own method, named checkAccountID() that passes the accountID as an argument to check if it is in that framework of one letter followed by 4 numbers. Any ideas?

Answer 1

Java Code:

class AccountCheck {
   //Main method
   public static void main(String args[]) {
      
       //Creating object
       AccountCheck accChk = new AccountCheck();
      
       System.out.println("\n checkAccountID(\"A0123\"): " + accChk.checkAccountID("A0123"));
       System.out.println("\n checkAccountID(\"80123\"): " + accChk.checkAccountID("80123"));
       System.out.println("\n checkAccountID(\"A03\"): " + accChk.checkAccountID("A03"));
       System.out.println("\n checkAccountID(\"C2235\"): " + accChk.checkAccountID("C2235"));
      
   }
  
   //Method that validates Account ID
   public boolean checkAccountID(String ID) {
       //Checking length
       if(ID.length() != 5) {
           return false;
       }
      
       //Converting to char array
       char[] c = ID.toCharArray();
      
       //Checking first character
       int val = (int)c[0];
       if( (val >=65 && val <= 90) || (val >=97 && val <= 122) ) {
          
           //Checking for numbers
           for(int i=1; i<=4; i++) {
               val = (int)c[i];
              
               //Checking ascii value
               if(val < 48 || val > 57) {
                   return false;
               }
           }
          
           return true;
       }
       else {
           return false;
       }
   }
}

_____________________________________________________________________________________________________

Sample Run: