CODEWITHSUNDEEP
java
Code Junkie
Code Junkie

Reputation: 7788

Split last two set of id's from string

I have the following string

ford-focus-albany-ny-v12356-l12205

I'm trying to parse the last two sets of numbers out

12356 and 12205

I'm using the prefix letter to define the id type since the order of those int may very. 

v = vehicle id "id length may very"
l = location id "id length may very"

I'd also like to add one may exist without the other. Example

ford-focus-v12356 or albany-ny-l12205

I'm really not sure what the best approach to splitting the string dynamically is, my initial thought was to find the last two - and then try to parse the ints from the prefix. Anybody have any suggestions or a possible example?

Upvotes: 0

Views: 62

Answers (4)

user3713314
user3713314

Reputation: 26

    String str = "ford-focus-albany-ny-v12356-l12205";
    String[] substrings = str.split("-");
    for (String arg: substrings) {
        if (arg.matches("v[0-9]*")) {
            String v = arg.substring(1);
        }
        else if (arg.matches("l[0-9]*")) {
            String l = arg.substring(1);
        }
    }

Upvotes: 1

Sergey Kalinichenko
Sergey Kalinichenko

Reputation: 726809

You can match one or both of them with a simple pattern:

(?:-([vl])(\\d+))(?:-[vl](\\d+))?

The idea behind this pattern is simple: it matches and captures the initial marker -v or -l, followed by a sequence of digits, which are captured into capturing groups.

Pattern p = Pattern.compile("(?:-([vl])(\\d+))(?:-[vl](\\d+))?");
for(String s : new String[] {"ford-focus-albany-ny-v12356-l12205","ford-focus-albany-ny-l12205","ford-focus-albany-ny-v12356"}) {
    Matcher m = p.matcher(s);
    if (m.find()) {
        if (m.group(1).equals("v")) {
            System.out.println("verhicle="+m.group(2));
            String loc = m.group(3);
            if (loc != null) {
                System.out.println("location="+loc);
            } else {
                System.out.println("No location");
            }
        } else {
            System.out.println("No vehicle");
            System.out.println("location="+m.group(2));
        }
    }
}

Here is a demo on ideone.

Upvotes: 1

Jorge Campos
Jorge Campos

Reputation: 23381

You can try it with regex expression and replace like this:

//this will give you 12356
"ford-focus-albany-ny-v12356-l12205".replaceAll( "(.*)(-v)([^-]*)(.*)", "$3" );

//this will give you 12205
"ford-focus-albany-ny-v12356-l12205".replaceAll( "(.*)(-l)([^-]*)(.*)", "$3" );

//this will also give you 12356
"ford-focus-v12356".replaceAll( "(.*)(-v)([^-]*)(.*)", "$3" ); 

//this will give you 12205
"albany-ny-l12205".replaceAll( "(.*)(-l)([^-]*)(.*)", "$3" );

Upvotes: 1

Fernando Rincon
Fernando Rincon

Reputation: 709

How about trying to split with String.split("-") and then use the Array returned like this:

String[] result = longString.split("-");
// Get the last number
String lastPrefix = result[result.lenght-1].subString(0, 1);
// Here check the prefix
// try to get number
int lastNumber;
try {
    lastNumber =  = Integer.parseInt(result[result.lenght-1].subString(1));
} catch (NumberFormatException e) {
    // Do something with exception
}

// And now do similar with result.lenght-2

Upvotes: 0

Related Questions