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

Pattern pattern = Pattern.compile("\\b[0-9]+\\b");

This should do it for you.^$ will compare with the whole string.It will match string with only numbers.