[JAVA] Tìm bậc của 1 Node

public void bac ( E e){ Queue <Node> q=new LinkedList(); if( r!= null) { q.add(r); while (!q.isEmpty()) { Node t=q.remove(); if(t.info.equals(e)){ int c =0; if(t.left!=null) c++; if(t.right!=null) c++; System.out.println(c); return ; } if(t.left!=null) q.add(t.left); if(t.right!=null) q.add(t.right); } } }