I see no problem with throwing a NPE as early as possible before the JVM does it for you – in particular for null arguments. There seems to be some debate about this, but there are many examples in the Java SE libraries that does exactly this. I cannot see why NPE should be holy … Read more
OK what I am trying to do here is create a game where the object/ball is controlled by clicking on the object with the mouse, pulling back the mouse (the distance the mouse is pulled back will determine the velocity of the object) and on releasing the button the object will move (it’s angle of … Read more
This whileloop is strange: If your input file is: Then scanner.nextLine() would be return a, then scanner.next() would return b, because nextLine returns the next end-line delimited String, and next returns the next token from the input file. Is this really what you want? I’d suggest trying this: Keep in mind that this would only … Read more
If you look at the stacktrace the error is at RScene:107 and the caller is javafx. So the problem is not in the beginRace method and its caller raceStartScene. My guess is at this line (seems to be an attribute): you call implicitly calcRisk(td) when creating this object, you have no guarantee that td is … Read more
Check intent is null or not before you get data example In ClassA: In ClassB:
Your app is crashing at: because mPlayer=null. You forgot to initialize Player mPlayer in your PlayGame Activity.
Well up to this part it runs smoothly and complies but when I proceed to run the program I get this error. Might be a silly mistake however I cant seem to figure this out. Please Help and thank you
4018 When you declare a reference variable (i.e., an object), you are really creating a pointer to an object. Consider the following code where you declare a variable of primitive type int: In this example, the variable x is an int and Java will initialize it to 0 for you. When you assign the value … Read more