Java

As we mentioned in the What is Serialization post, we can use Serialization to move data into or out of a data stream. So let’s take a look at a simple class, and one that we would want to serialize. This is pretty simple, as you’ll see, we’re just going to add an interface to…

Java serialization is a mechanism to transform an object into a byte stream, and back again via Deserialization. This is important for anything which needs to be transmitted to another device/service such as writing to a file, across a network, etc. In order to do this, we need to implement the Serializable Interface. This provides a…

Most languages provide a way to work with Strings, and Java is no exception. Java sometimes provides several ways to create, as well as work, with strings. We’ll look at the most common ways to work with Strings that you will experience. Creating a String Where you get a string will vary based upon your…

Writing to a file in Java is similar to reading from a file, in that you have to be mindful of your exceptions, however, writing is handled by different Classes. But you will find the process very similar. Setting up the Writer Instead of using FileReader, you will want to use FileWriter. To use a…

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…

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…

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…