In java how can i extract a alphabet from a alpha numeric vaue. At that time which exception is called?

Question

write a program which accepts a numeric value from the user, If a user enters an alphanumeric value, the program throws an exception and display an error message

Answer 1

Accept the input as a String()

Then convert to the required format using parse as follows.
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Double.html#parseDouble(java.lang.String)
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Float.html#parseFloat(java.lang.String)
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Short.html#parseShort(java.lang.String)
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Integer.html#parseInt(java.lang.String)
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Long.html#parseLong(java.lang.String)

You will notice that these all throw a NumberFormatException