Java regex group extraction from matching statement

I try extracting interface name (in this case FastEthernet0/0) from a regex matching statement. It works when there is only one expression in the pattern, but if 4 expressions are specified in a pattern, separated with |, the output is not what i m expecting. how to modify the code to return 5 times with FastEthernet0/0? There are 5 matches in config. I also tried using matcher.group(2) with almost the same result.

public class ProcessConfig
{
public static void main(String[] args) throws IOException
{
    try(
            BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
            )
    {
        String[] lines=new String[1000];
        int i=0;


        Pattern pattern=Pattern.compile("(.*snmp-server trap-source\\s)(.+)|(.*ip tacacs source-interface\\s)(.+)|(.*logging source-interface\\s)(.+)|(.*sccp local\\s)(.+)");
        Matcher matcher;

        while(!(lines[i]=br.readLine()).equals("end"))
        {
            matcher=pattern.matcher(lines[i]);

            if(matcher.matches())
            {     
                System.out.println(matcher.replaceAll("$2"));
            }

            i++;
        }
    }
}
}

Thank you