In java

Using the do-while loop and the if constructs, write the isYourInputNumbersOnly function/method that reads in a sequence of characters (one character at a time) and return true if they represent one valid number (digits only) and false otherwise (Valid number is defined as a sequence of digits between 0 and 9)

boolean isYourInputNumbersOnly() ;

Please simply use System.in.read() to read in one character at a time.