SlivaneNaSpisuciHomeWork

import java.util.ArrayList;
import java.util.Arrays;

public class SlivaneNaSpisuci {
    public static void main(String[] args) {
        String text = " 1 2 3 | 4 5 6 | 7 8 9 ";
        String [] SplitText = text.split("\\|");

        ArrayList<String> MyList = new ArrayList<>();

        for (int i = SplitText.length - 1; i >= 0; i--) {
            String[] CurrentElement = SplitText[i].split("\\|");
            MyList.addAll(Arrays.asList(CurrentElement));
        }
        System.out.println(MyList);
    }
}