You will find conditions in Java familiar if you are used to using boolean conditions in C/C++. However, noticed that I said boolean conditions. That is because Java wants boolean conditions, those that generate a true or false answer, instead of the C/C++ conditions which actually look for an integer value. Notice the following below…
Inside of a method, like our main method, we might want to create some variables for use. Java gives us numerous primitive data types that we can use, and within a method, we declare and use them, just like we would in C/C++. Comments You might have noticed the comment above. Comments in Java are…
Just like in C++, each executable Java project should have a main method. This isn’t just the “main” method that is run, but an actual method called main(). If you look at the previous page for creating a file, we can start from there. This will be a little different from the C++ main method,…
Creating our first file is fairly simple. Using an IDE like Visual Studio Code is a good place to start. Eclipse is another popular IDE, as are some others. However, you only have to have a plain text editor if you want. You can use a command line compiler and run time tool if you…
Java was designed with a couple of main purposes in mind to be Object Oriented from the beginning, as a “write once, run anywhere” model, so that code doesn’t have to be rewritten While the idea behind Java hasn’t always held true, where lots of front end code would be written and run equally on…
The Bubble Sort is one of the simplest sorts you can write, from a developer’s perspective. Unfortunately, it is one of the slowest to run from the computer’s perspective. A bubble sort works on the following idea. Given a list of values, start at the top value and look at the next value. If the…
If our data is pre-sorted then a binary search starts to make a lot of sense. It is like the guessing game we mentioned earlier where you need to find a number between 1 and 100. No one asks for 1, then 2, then 3… until they find it. Instead we ask for the mid…
Now in some cases, we’ll use a brute force method of searching. This is slow and inefficient from a run-time perspective. However, it is relatively fast to write. With a brute force search, you scan through every item in a list until you find the element. Why use Brute Force As you can imagine, scanning…
