Write a method with the following header to convert a binary string to a decimal number.

public static int bin2Dec(String binaryString) throws NumberFormatException

Implement the bin2Dec method to throw a NumberFormatException if the string is not a binary string.

In the main method, ask the user to enter a binary string by using the next() method, call the method above, and display the correspond decimal value. Your program must catch the NumberFormatException and if the input string is not a binary string, the program should display an appropriate error message. Two sample runs are given below:

Enter a binary string: 10011

The corresponding decimal number is 19

Enter a binary number: 12011

java.lang.NumberFormatException: Binary number format error