I have following output from a command:
24936 09/23/18 23:19:53 --------------------------------------------------
24936 09/23/18 23:19:53 INITIALISING NETWORK PARAMETERS
24936 09/23/18 23:19:53 --------------------------------------------------
24936 09/23/18 23:19:53 Current Executable directory is C:\CVS\Base
24936 09/23/18 23:19:53 Checking dBaseHome in the Registry for Instance002
24936 09/23/18 23:19:53 C:\CVS\Base
24936 09/23/18 23:19:53 Network Parameters
24936 09/23/18 23:19:53 --------------------
24936 09/23/18 23:19:53 Host Name : 10-43-96-175
24936 09/23/18 23:19:53 Domain Name : abcd.com
24936 09/23/18 23:19:53 DNS Server IP : 12.43.53.23
24936 09/23/18 23:19:53 Machine uses Dynamic Host configuration Protocol
24936 09/23/18 23:19:53 No of Interfaces : 22
24936 09/23/18 23:19:53 Initialization Completed
--------------------------------------------------
Initialization Result
--------------------------------------------------
Client Host Names :lkmn.com
Client Names :client
CommServeHostName :host.com
Configuration :The machine is Client
IP Configured :IPv4
Instance Name :Instance002
Networking Status :Passed
--------------------------------------------------
LOG BEGINS
--------------------------------------------------
24936 09/23/18 23:19:53 --------------------------------------------------
24936 09/23/18 23:19:53 DNS lookup for Host Name : abcd.com
24936 09/23/18 23:19:53 --------------------------------------------------
24936 09/23/18 23:19:53 DNS Look Up Output:
Non-authoritative answer:
Server: server.com
Address: 43.4.3.4
Name: client.com
Address: 10.43.96.175
24936 09/23/18 23:19:53 --------------------------------------------------
24936 09/23/18 23:19:53 --------------------------------------------------
24936 09/23/18 23:19:53 Using IPv4 family
24936 09/23/18 23:19:53 Testing Addresses:
24936 09/23/18 23:19:53 Testing 10.43.96.175 ->
24936 09/23/18 23:19:53 [Failed]
Failure reason : Generic Failure
--------------------------------------------------
SUMMARY
--------------------------------------------------
Forward and Reverse Lookup - CVIPInfo :
IP : 10.43.96.175 Failed
--------------------------------------------------
LOG ENDS
--------------------------------------------------
RESULTS
-------
DNS LOOKUP : SUCCESS
HOST FILE LOOKUP : NOT PRESENT
FORWARD AND REVERSE LOOKUP
--------------------------
IP Version : IPv4
Status : FAILED
____________________________________________________________
END
____________________________________________________________
I want to extract the value of key CommServeHostName from it which is host.com.
I have tried following code by splitting the lines:
for (String line : output.split("\n")) {
if (line.startsWith("CommServeHostName")) {
String[] split = line.split(":");
System.out.println(split.length > 1 ? split[1] : null);
break;
}
}
Is there a better way to do it without splitting the output to lines and using regex? It has to be done in Java-6.
You can use the regex
(?m)^CommServeHostName\\s+(.+)$
which will match the line that begins with CommServeHostName and will capture whatever non-spaces there are right before the end of the line in the first capturing group:
String reg = "(?m)^CommServeHostName\\s+(.+)$";
Matcher m = Pattern.compile(reg).matcher(output);
m.find();
System.out.println(m.group(1));