Check a string value using multiple different number ranges

I have a string that looks like this: 20/11/2019

I would like to check if:

• The first number is between 1 and 31
• The second number is between 1 and 12
• The third number is between 2000 and 2999

The numbers are separated by "/".

---

I have tried using regex, but I'm not familiar with it.

if (ExpDate.matches("[1-31]/[1-12]/[2000-2999]")){
//something happens
}

Is there any way to accomplish this correctly?

Thanks in advance for any help.