I am using this approach but it is giving null pointer Exception is there any other way to do that ? private BaseExtension android; StringBuilder str=new StringBuilder();          File file = this.android.getSdkDirectory();         Intrinsics.checkExpressionValueIsNotNull(file, &quot;android.sdkDirectory&quot;);         String androidJar = str.append(file.getAbsolutePath()).append(&quot;/platforms/&quot;)                 .append(this.android.getCompileSdkVersion())                 .append(&quot;/android.jar&quot;).toString();
What are Null Pointer Exceptions (java.lang.NullPointerException) and what causes them?  What methods/tools can be used to determine the cause so that you stop the exception from causing the program to terminate prematurely?
How do I bake chocolate chip cookies like Subway? I want a chocolate chip cookie like the ones Subway has. Those cookies have a smooth top and chewy texture.  I have a recipe for 3/4 cup fat, 0.5 cup sugar 0,5 cup brown sugar, 3/4 cup flour, 1 egg, 2 tsp extract. I get a semi stiff dough, but also an airy cookie, not as dense like Subway. I use room temperature margarine.  I have tried to bake cookies with 2 eggs and with 1 egg, but they always come out wrinkly on top, not as stiff. Is it possible that using an egg and a yolk would work? (But wouldn't that waste a lot of whites if that's how they do it?)  I think as part of this I want a stiff dough, that'll leave the bowl clean, to minimize spread and keep the tops from getting wrinkly as stiffness will keep the the cookies from expanding and contracting. Is that true? If so, I'm afraid that if I add more flour to stiffen the dough will make the cookies cakey - is that the case? How would I avoid that? Is there an upper limit to temperature in thermodynamics or statistical mechanics In many presentations of statistical mechanics where we have a system of particles having mass, such as the molecules of an ideal gas, the temperature is often equated to the average relative velocity of the particles. However no such velocity can exceed that of light. Is there therefore an absolute upper bound to temperature as well as an absolute zero? Is it correct to write $\Bbb E[X]$ or $\Bbb E_{\theta}[X]$? Suppose that we observe the discrete random variable $ X = (X_1, \dotsc , X_n)$ with state space S, whose distribution we do not know but we are assuming that its joint p.m.f. belongs to a known family $\{f_θ : θ ∈ Θ\}$. We derive a sufficient statistic $T(X)$.  Is it correct to write $\Bbb E[X]$? If not, why? Would it be more correct to write $\Bbb E_{\theta}[X]$? How to use Cubic to create a custom Ubuntu live CD image? check if "it's a number" function in Oracle Chrome's default search engine is .  How we can force chrome to use  without https?  I need a solution that allows proxies to rewrite my URLs, but https currently makes this impossible... In plain English, how does casting spells and using creature abilities work with the stack and priority? I'm a relatively new player to Magic: the Gathering. I was reading  to try to understand exactly when it's okay to cast instants (e.g. ) and use some abilities (e.g.  should be tappable sometime during other peoples' turns), but I don't seem to be making much progress: as I come to understand some things, others make less sense.  My confusion is boundless  For instance: to cast  one needs priority. Spells go on the stack, and priority gets passed at some points (I have no idea when), and effects on the stack are resolved when both players have passed priority. But when is that? I can't find any mention of when the other player gets the priority to cast an instant, except on their own turn. Furthermore,  states that during the Main Phase:     505.4. Second, the active player gets priority. Players may cast spells and activate abilities. The active player may play a land.   So players (plural) may cast spells, but only the active player has priority, so only the active player can cast an instant. The turn rules, and the rules on , never mention any point at which the other player gets priority, so when can they possibly Cancel?  In addition, you can only cast a spell when the stack is empty, so the entire stack must be able to be resolved in your turn at some point.  I need an explanation!  I could go on a bit more. There is also  which can be overloaded to "Counter each spell you don't control", which seems like it could only possibly work with an understanding of the stack.  Could someone explain, in simple English:   When can Instants be cast? When can tap abilities be used? What do Instants and abilities have to do with the Stack and Priority? I´m having some trouble with my udev rule. At the moment, I had my udev rule setup to execute a script whenever a Android phone is connected to any USB port on the computer. But I don´t want the script to be executed from every USB port. I just want that the script to be execute in example when the phone is connected to the 4th USB port and nothing should happen when it is connected to 1st, 2nd or 3rd USB port.  How can I achieve that and how can I determine the for example 4th USB Port?  I would highly appreciate your help.  My current udev rule:  KERNELS="1-2:1.1", ACTION=="add", ENV{DEVTYPE}=="usb_device", ATTRS{idVendor}!="1d6b", ATTRS{idVendor}!="203a", ATTRS{idVendor}=="****", ATTRS{idProduct}=="****", RUN+="/usr/local/bin/tmp.sh $attr{serial}" How to create a table with merged columns and rows, and wrapped text, like in MS Word? My csv export displaying html, how to get rid of? In the DC Comics Universe, What Happens to Earthlings Under a Red Sun? I know in the earliest versions of Superman, his powers weren't from the yellow sun, but that was changed and, in general (at least as I understand it), Superman's powers are because he was native to a world with a red sun and now he's under a yellow sun.  What happens to an Earthling or other native to a yellow sun planet when near a red sun?  And what if the sun is blue?  Or a brown dwarf?  Please note: I'm asking about a red sun, not about living on Krypton.  Okay, that's heavy gravity, but it's not the only planet under a red sun.  (But, still the point about whether yellow sun natives would have super powers would come into play there, wouldn't it?) How can an object's instantaneous speed be zero and it's instantaneous acceleration be nonzero? I'm studying for my upcoming physics course and ran across this concept - I'd love an explanation. Is there a known well ordering of the reals? So, from what I understand, the axiom of choice is equivalent to the claim that every set can be . A set is well ordered by a relation, $R$ , if every subset has a least element. My question is: Has anyone constructed a well ordering on the reals?  First, I was going to ask this question about the rationals, but then I realised that if you pick your favourite bijection between rationals and the integers, this determines a well ordering on the rationals through the natural well order on $\mathbb{Z}$ . So it's not the denseness of the reals that makes it hard to well order them. So is it just the size of $\mathbb{R}$ that makes it difficult to find a well order for it? Why should that be?  To reiterate:   Is there a known well order on the Reals? If there is, does a similar construction work for larger cardinalities? Is there a largest cardinality for which the construction works? Does creating an object using reflection rather than calling the class constructor result in any significant performance differences? Cycles in permutations of a given size I let my younger cousins play on my S4 from time to time, but now I have found that all the words they have used are the first to come up when I use my phone to text. It has gotten quite irritating. Samsung seems to have very hard to find settings compared to my old Sony Ericsson so I cannot find where to get rid of the word history typed onto my phone's keyboard. Problem: We have matrix $A\in M_{n-1\times n}(\mathbb Z)$ so that the sum of elements in each row is zero. Prove that $\det(AA^T)=nk^2$, where $k\in \mathbb Z$.  What have I considered so far:   First I thought, since sum of all elements in each row is zero, zero is eigenvalue of $A$ but $A\in M_{(n-1)\times n}(\mathbb Z)$ confused me. I see that $AA^T$ will be $(n-1)$ by $(n-1)$, so I tried calculating $AA^T$ but I failed to see any connection.   I did some research and found  question but we had no mention of it, which makes me believe I am on the wrong track.  Thank you all for your help. Should I use the datetime or timestamp data type in MySQL? Would you recommend using a  or a  field, and why (using MySQL)?   I'm working with PHP on the server side. Other types of vector multiplication. As far as I've seen, there are only two types of vector multiplication defined, dot product/inner product which is defined in a vector space of any dimension, even infinite, and cross product, which is only defined in three dimensions. Are there more definitions of vector products? Why didn't the basilisk bite in Chamber of Secrets destroy the Horcrux?