Write a method that hides the characters in a string, yielding a string of equal length where each character is replaced by a *. For example, the call hideCharacters ("secret") should return the string "******". 1 import java.util.Scanner; 3 public class Strings 4 { 1234569 /** 7 8 9 10 11 */ 12 13 { 14 15 16 Returns a string of asterisks of the same length as a given string. @param str a string such as "secret" @return a string with each character of str changed to a *, such as "******" public static String hideCharacters (String str) *Your code goes here */