java基本类型值与包装类对象null的比较会导致空指针

  try {
            System.out.println(0 == (Integer)null);
        } catch (Exception e) {
            e.printStackTrace();
        }
        try {
            System.out.println(0 == (Long)null);
        } catch (Exception e) {
            e.printStackTrace();
        }
        try {
            System.out.println(0 == (Double)null);
        } catch (Exception e) {
            e.printStackTrace();
        }