import java.util.Arrays;
import java.util.stream.Stream;

class Example {
    public static void main(String[] args) {
        String[] strs = "1|2|3#1|2".split("#");
        String[][] result = Stream.of(strs).map(e -> e.split("\\|")).toArray(String[][]::new);

        for (String[] a : result) {
            System.out.println(Arrays.toString(a));
        }
    }
}