what did I do wrong to get an error in the replace() method?

Question

My teacher asked us to design a program that receives a string value and then converts all numeric characters to *.

I tried the replaces method but it did not work.

Answer 1

You have to use regular expressions. In addition to that, since you want to replace all numbers, you should use replaceAll instead of replace. This should do the job:

s.replaceAll("[0-9]", "*")

Use it to instead of

s.replaces(...)