Ok so I have to read in a postfix expression from a file. The postfix expression must have spaces to separate each operator or operand. What I have so far works only if there is no spaces between the operators or operands in the input file. (i.e. if the file has 12+ the result I … Read more
At the simplest level, a key-value pair is just two values, one of which you have designated to be a “key” and the other you have designated to be the “value”. However, it is more common to talk about key-value pairs in the context of a mapping, i.e. a (mathematical) function which maps from a … Read more
Use the std::vector class from the standard library.
id is of primitive type int and not an Object. You cannot call methods on a primitive as you are doing here : Try replacing this: with
I was trying to make a Minecraft server and got the following error on startup: Error occured during initialization of VM Could not reserve enough space for object heap Error: Could not create the Java Virtual Machine Error: A fatal exception has occurred. Program will exit. I tried everything I could find: I created CLASS … Read more
First of all, I have a box with 8gb of ram, so I doubt total memory is the issue. This application is running fine on machines with 6gb or less. I am trying to reserve 3GB of space using -Xmx3G under “VM Arguments” in Run Configurations in Eclipse. Every time I try to reserve more … Read more
When programming in Java, you make other classes available to the class you are writing by putting something like this at the top of your source file: Or sometimes you ‘bulk import’ stuff by saying: So later in your program when you say: The Java Virtual Machine will know where to find your compiled class. … Read more
The problem is that you mapped your servlet to /register.html and it expects POST method, because you implemented only doPost() method. So when you open register.html page, it will not open html page with the form but servlet that handles the form data. Alternatively when you submit POST form to non-existing URL, web container will … Read more
In C, the language itself does not determine the representation of certain datatypes. It can vary from machine to machine, on embedded systems the int can be 16 bit wide, though usually it is 32 bit. The only requirement is that short int <= int <= long int by size. Also, there is a recommendation that int should represent the native capacity of the processor. All types … Read more