Creating regex to extract 4 digit number from string using java

Question

Hi I am trying to build one regex to extract 4 digit number from given string using java. I tried it in following ways:

String mydata = \"get the 0025 data f         


        

Answer 1

Change you pattern to:

Pattern pattern = Pattern.compile("(\\d{4})");

\d is for a digit and the number in {} is the number of digits you want to have.