splitting string using switch afterwards

Question

I'm currently porting a VB project to java and encountered a problem I'm stuck with.

I'm receiving a string which looks like the following:

HOST: xxx.xxx.xxx.xxx
DEFAULT: xxx.xxx.xxx.xxx 
OS: LINUX
ID: az150
LIB: eth15

newline at the end of each output, space after ":" I'd like to split those strings and use a switch case afterwards. Not sure if the order stays the same all the time.

the switch case would look something like this:

switch(aString)
{
case "HOST":
   String host = HOST Value (xxx.xxx.xxx.xxx);
   do something with it
   break;
...

default:
  break;
}

thanks!

@ Avinash Raj: will try that @ Stultuske: sorry if I wasn't clear. I'm curious how to do it — 12dollar, Feb 12 '15 at 08:33
possible duplicate of [How to split a String in Java](http://stackoverflow.com/questions/3481828/how-to-split-a-string-in-java) — Simulant, Feb 12 '15 at 08:33
one thing I forgot to mention: It's possible one key doesn't have a value (e.g HOST: ). if I split using the :\\s+ regex wouldn't a key get assigned to a value by mistake? — 12dollar, Feb 12 '15 at 08:38
In that case, I suggest you split by "\n" to separate it into lines and process each one separately with the :\\s+ regex. — colavitam, Feb 12 '15 at 08:39

score 0 · Answer 1 · answered May 22 '15 at 16:01

The String.split() method is able to solve the problem and even no regular expression is needed.

Suggest you have a string like

String string = "HOST: xxx.xxx.xxx.xxx\n"
        + "DEFAULT: xxx.xxx.xxx.xxx\n"
        + "OS: LINUX\n"
        + "ID: az150\n"
        + "LIB: eth15";

then you can get a key-value line as follows

String[] lines = str.split("\n");

for each line in the array, key and value could be achieved like

String[] entry = s.split(":");
String key = entry[0];
String value = entry[1].trim(); // omit whitespace

then you can put the key-value pair anywhere you want, such as Map, Property, Config, etc. And then the switch sentence will work well. You can also check whether the value is empty before using it since the value might contain nothing.

splitting string using switch afterwards

1 Answers1