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Imagestarionwolf wrote in Imagejava_dev

Validating strings

Hi! I'm doing a project for my management of information systems class. My professor wants me to validate a date using the method "matches()."

Update:
I got the code to work! Yay. I was playing around with the parentethes and \\/ like someone suggested. Here's the new code:

      else if (!dateTextField.getText().matches(
              "([0][1-9])|([1][0-2])\\/"
              + "([0][1-9]|[1-2][0-9]|[3][0-1])\\/"
              //+ "([0][1-9])|([1-2][0-9])\\/"
              + "2004"))



He tried this code, but it doesn't work. He wants to students to make it work. :D

The date format should be in: mm/dd/yyyy as in: 01/31/2004.

This is almost the exact same code he gave us:
if ...

      else if (!dateTextField.getText().matches(
              "([0][1-9])|([1][0-2])\\/"      // Digits for the days
              + "([0][1-9])|([1-2][0-9])|([3][0-1])\\/"      // Month digits
              + "[2][0][0][4]"))    //  Year
      else ...


The problem (logic error) is with this line:

"([0][1-9])|([1-2][0-9])|([3][0-1])\\/"    // Month digits
([0][1-9]) works if I comment everything else on the line.  If I add |([1-2][0-9])|([3][0-1])\\/ , the code doesn't work.

My professor didn't teach us how to use {} and \\d.  I'm not sure how to use them in the code above.

The other lines work.

LJ Video