I have referenced this in an attempt to convert my list to an array, but I can't seem to get it to work. Here is what I have:
int values[] = Arrays.asList(str.replaceAll("[^-?0-9]+", " ").trim().split(" ")).toArray();
The error that I am getting (type mismatch) is stating that I should change the type of values[] from int to object
The end result should just be an array of numbers. Example: a-9000xyz89 would be an array with [-9000, 89] as the values
String#split will return String[] and not int[]. You have to iterate over String[] and create int[]. Moreover, you don't need to convert array to list with Arrays.asList.
For example,
String str = "1 2 3 4";
String arr[] = str.split(" ");
int[] ans = new int[arr.length];
for (int i = 0; i < arr.length; i++) {
ans[i] = Integer.parseInt(arr[i]);
}
System.out.println(Arrays.toString(ans));
OUTPUT
[1, 2, 3, 4]
EDIT
I am getting the same error when I remove the
toArray()and when I changevalues[] to a String[]. String values[] = Arrays.asList(question.replaceAll("[^-?0-9]+", " ").trim().split(" "));
Note that Arrays.asList in your case will return List<String> but type of values is String[].
You can directly store result of split in values,
String values[] = question.replaceAll("[^-?0-9]+", " ").trim().split(" ");
Following will work for Java 8
int[] values = Arrays.stream(str.replaceAll("[^-?0-9]+", " ").trim().split(" ")).mapToInt(Integer::parseInt).toArray();
Note - [^-?0-9]+ does not support strings such as a-90-00xyz89 or a-9000x-yz89 because it will produce non-integers
