Goal: To complete some methods that utilise simple regular expressions to process and

validate different string formats. Please see Lecture $4,$ slides $43-53$ for details on regular

expressions $($regex$).$

Please refer to the API for lab$2($and the comments within the Question$02.$java file$)$ for

more information on the operation of each method $($and hints$).$

There are two methods to complete for this question.

In the first, we will use a regex expression and a suitable replace$-$based method from the

String class to match and replace all digits in an input string $$text$$ with the corresponding

String $$mask$$ both provided as arguments to the method. The result should be the new

version of the string, which should be returned from the method.

public String replaceAllNumbers$($String text, String mask$)$

Examples:

replaceAllNumbers$("1+2=3","$#$")->"$# $+$ # $=$ #$"$

replaceAllNumbers$("$I am $30$ years old", $"?)->$ "I am $30$ years old"

replaceAllNumbers$("$I live at $1234$ Main St$","*")$

$->$ "I live at $****$ Main St$"$