Reading a file is going to require using a stream like we’ve seen before. The we will read through the file. Opening the File First we will need to set up a FileReader object, such as: Note, in order to use FileReader, you will need to import java .io into your project. However, we will…
Reading from the console is something that most people learn to do in a single line or two of code in most languages. However, Java is not most languages… Consider Python: C++ Java So what is going on with that? System.in So lets start with the System.in. This is the console input stream object, just…
To write to a file in Flutter, you will be combining some Dart libraries with the Flutter SDK. You need the Flutter component to let you know where to write your file, while you need the Dart Libraries to actually perform the IO operations. In Flutter, the path_provider provides a platform agnostic way to access…
Exceptions are a type of error that a Java application might produce if there is a problem. Now one potential issue with this is that Java has both Exceptions and Errors, so lets discuss those real quick. Error: indicates serious problem that a reasonable application should not try to catch. These tend to deal with issues…
Storing persistent data is always something that a lot of developers have to think about. We want to keep track of where we’ve been, what we’ve seen, etc. Persistent means that the data will be remembered even if we close the application, so when we return to it, the data is still there. There are…
Java IO Streams represent either an input source, or an output destination where you are trying to send receive/data. This can be to a console window, reading a file from a disk (or SSD), network communication, etc. Java uses the concept of IO streams, and how to handle them, almost identically between all sources. This…
As we’ve discussed, all elements on the screen in Flutter are a Widget. One interesting thing to note however, is there are two main categories of widgets, and that doesn’t mean stateless and stateful, rather those which only have a single child, and those which allow for children. Single Child Widgets These widgets will have…
Sending data to a server is extremely important, as without it, you cannot search/lookup data, add new data, make changes, or even potentially remove data. We’ll build off the idea of our last two examples of getting data from an Internet server with Flutter. And if we send data to a server, we’re almost always…
