Split String with comma and get the last two values

Question

I have field type string that can get two type of values on it:

1. simple field eg p1
2. complex fields p1/p2/p3/p4

Now I have 2 questions:

1. how can I identify that the type is complex with little effort as possible since the check is runs in loop?
2. when I got type complex I need to store the last two properties for example p3 and P4?

Answer 1

just use split operation and check length.

String[] prop = strprop.split("/");
if(prop.length > 1){
    String El = prop[prop.length];
    String El0 = prop[prop.length-1];
}

Answer 2

To answer 1) I would use (assuming variable str contains your value):

str.contains("/"); // If true => complex type

For 2):

String[] vals = str.split("/");
String lastVal = vals[vals.length-1];
String preLastVal = vals[vals.length-2];

Please note that you should check for array length before trying to get the values, otherwise you're likely to get an ArrayIndexOutOfBoundsException.