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## RegexMatch
### Instructions
Create a file `RegexMatch.java`.
Write a function `containsOnlyAlpha` that returns `true` if the string as parameter contains only alpha characters.
Write a function `startWithLetterAndEndWithNumber` that returns `true` if the string as parameter starts with one letter and ends with one number.
Write a function `containsAtLeast3SuccessiveA` that returns `true` if the string as parameter contains at least 3 successive A.
### Expected Functions
```java
public class RegexMatch {
public static boolean containsOnlyAlpha(String s) {
// your code here
}
public static boolean startWithLetterAndEndWithNumber(String s) {
// your code here
}
public static boolean containsAtLeast3SuccessiveA(String s) {
// your code here
}
}
```
### Usage
Here is a possible ExerciseRunner.java to test your function
:
```java
import java.io.IOException;
public class ExerciseRunner {
public static void main(String[] args) throws IOException {
System.out.println(RegexReplace.containsOnlyAlpha("azejkdfhjsdf"));
System.out.println(RegexReplace.containsOnlyAlpha("azejkd fhjsdf"));
System.out.println(RegexReplace.startWithLetterAndEndWithNumber("asjd jd34jds jkfd6f5"));
System.out.println(RegexReplace.startWithLetterAndEndWithNumber("asjd jd34jds jkfd6."));
System.out.println(RegexReplace.containsAtLeast3SuccessiveA("sdjkAAAAAsdjksj"));
System.out.println(RegexReplace.containsAtLeast3SuccessiveA("sdjkAAsdaaasdjksj"));
}
}
```
and its output :
```shell
$ javac *.java -d build
$ java -cp build ExerciseRunner
true
false
true
false
true
false
$
```
### Notions
[Pattern](https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/regex/Pattern.html)