Question

Is it possible to use a java contains with lastIndexOf?

I am grabbing some information out of a file, and need to grab the last occurrence of it.

the file looks like this

17,560.0
17,583.0
17,606.0

And I am using something like this.

System.out.println(lines.indexOf("17"));

However it wont work because it looks for exactly the 17, and wont take any more.
Any way around this?

Answer 1

No. You will need to loop through the collection to get that kind of lastIndexOf.

Something like:

int li = -1, i=0;
for (line : lines) {
    if (line.startsWith("17")) {
       li = i;
    }
    i++
}

Then you will get in li value of last index with a line starting with 17. If li is -1, then a value starting with 17 was not found.