I am using the String split method and I want to have the last element. The size of the Array can change.
Example:
String one = "Düsseldorf - Zentrum - Günnewig Uebachs"
String two = "Düsseldorf - Madison"
I want to split the above Strings and get the last item:
lastone = one.split("-")[here the last item] // <- how?
lasttwo = two.split("-")[here the last item] // <- how?
I don't know the sizes of the arrays at runtime :(
You could use lastIndexOf() method on String
String last = string.substring(string.lastIndexOf('-') + 1);
Save the array in a local variable and use the array's length field to find its length. Subtract one to account for it being 0-based:
String[] bits = one.split("-");
String lastOne = bits[bits.length-1];
Caveat emptor: if the original string is composed of only the separator, for example "-" or "---", bits.length will be 0 and this will throw an ArrayIndexOutOfBoundsException. Example: https://onlinegdb.com/r1M-TJkZ8
using a simple, yet generic, helper method like this:
public static <T> T last(T[] array) {
return array[array.length - 1];
}
you can rewrite:
lastone = one.split("-")[..];
as:
lastone = last(one.split("-"));
You mean you don't know the sizes of the arrays at compile-time? At run-time they could be found by the value of lastone.length and lastwo.length .
Also you can use java.util.ArrayDeque
String last = new ArrayDeque<>(Arrays.asList("1-2".split("-"))).getLast();
In java 8
String lastItem = Stream.of(str.split("-")).reduce((first,last)->last).get();