How to remove null in the List (JAVA)

Just add as below
listnameObject.removeAll(Collections.singleton(null));

For Ex:
public class MapTest {
  public static void main(String[] args) {

    List<String> scores = new ArrayList<String>();

    scores.add("100");

    scores.add("90");

    scores.add("80");

    scores.add("97");

    scores.add(null);

    scores.removeAll(Collections.singleton(null));

   

    for(String a : scores){

      System.out.println(a.toString());

    }

  }

}

O/P:

100

90

80

97