I am reading input from file it contains set of lines as below :
BDI100                 172.20.1.5      YES TFTP   up                    up
BDI500                 172.20.1.50     YES TFTP   up                    up
BDI600                 172.20.1.58     YES TFTP   up                    up

i have to extract the complete line which contains only 172.20.1.5

Below is my code :
            while ((line = lineNumberReader.readLine()) != null) {
                    Pattern p = Pattern.compile(expr.trim()); /*expr is filter contains 172.20.1.5 */
                    Matcher m = p.matcher(line);
                    if(m.find()){
                        System.out.println(line);
                    }
                }``