private void RandNote(NotePaint paint){
         ib.clear(); //поле класса Practice. Тип ArrayList<Integer>
         ib.add(0,random.nextInt(10)); //Запись в ArrayList
        
        if (paint.equals(sNote)){
                  paint.setMassive(ib);
                 
                  bNote.getMassive().clear();
                  System.out.println("sNote "+sNote.getMassive());
                  System.out.println("bNote "+bNote.getMassive());
        
      }
}

RandNote(sNote)

bNote.getMassive().clear();

System.out.println((paint.equals(sNote));
System.out.println((paint.equals(bNote));

RandNote(sNote)

sNote.yUser=3;
System.out.println(sNote.yUser);
System.out.println(bNote.yUser);

System.out.println("1. bNote "+bNote.getMassive().toString());
ib.add(0,iRand);
System.out.println("Randote ib:"+ib.toString());
System.out.println("2. bNote "+bNote..getMassive().toString());