import java.util.Random;
public class test
{
    public static void test1(){
        Random r = new Random();
        int[] arr = new int[5];
        for (int i = 0; i < arr.length; i++){
            arr[i] = r.nextInt();
        }
        LinkedList test = new LinkedList(arr);
        
        System.out.println(test);
        System.out.println(test.erste());
        System.out.println(test);
    }
}