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

Remove the anchors.. put paranthesis if you want them in group 1:

Pattern pattern = Pattern.compile("([0-9]+)");   //"[0-9]{4}" for 4 digit number

And extract out matcher.group(1)