enter code here

while (strength < 6) {
        final int innerStrength = strength;
        //fill first list
        List<Player> all1Plyers
                = myBigList.stream().filter(x -> x.getNum() == innerStrength && x.isUsed == false).collect(Collectors.toList());

        all1Plyers.get(index).isUsed = true;
        teamAdding1.add(all1Plyers.get(index));
        myadapter = new Myadapter(this, teamAdding1);
        recyclerviewTeam1.setAdapter(myadapter);
        myadapter.notifyDataSetChanged();

        //fill second list
        all1Plyers
                = myBigList.stream().filter(x -> x.getNum() == innerStrength && x.isUsed == false).collect(Collectors.toList());

        all1Plyers.get(index).isUsed = true;
        teamAdding2.add(all1Plyers.get(index));
        myadapter = new Myadapter(this, teamAdding2);
        recyclerviewTeam2.setAdapter(myadapter);
        myadapter.notifyDataSetChanged();


        //fill third list
        all1Plyers
                = myBigList.stream().filter(x -> x.getNum() == innerStrength && x.isUsed == false).collect(Collectors.toList());

        all1Plyers.get(index).isUsed = true;
        teamAdding3.add(all1Plyers.get(index));
        myadapter = new Myadapter(this, teamAdding3);
        recyclerviewTeam3.setAdapter(myadapter);
        myadapter.notifyDataSetChanged();

        strength++;

enter code here
public void addButton_onClick(View view) {

    String name = editTextName.getText().toString().trim();
    //  int num = Integer.parseInt(editTextNum.getText().toString());
    Player p = new Player(name, num, false);
    if (myBigList.size() < 15) {
        List<Player> all1Plyers
                = myBigList.stream().filter(x -> x.getNum() == num && x.isUsed == false).collect(Collectors.toList());

        if (all1Plyers.size() < 3) {
            myBigList.add(p);
        } else {
            Toast.makeText(this, "You already have 3 players of " + p.getNum() + " lvl", Toast.LENGTH_LONG).show();
        }
    }

    //  editTextNum.setText("");
    editTextName.setText("");

enter code here
private String name;
private int num;
public  boolean isUsed;

public Player(String name, int num, boolean isUsed) {
    this.name = name;
    this.num = num;
    this.isUsed=isUsed;
}

public Player(String name) {
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public int getNum() {
    return num;
}

public void setNum(int num) {
    this.num = num;
}

@Override
public String toString() {
    return name;
}