Meet Java

Take a look at the MyActivity.java tab. Here, we can see the code that we briefly discussed.

Before we write our own methods to correspond with the methods that our buttons are already wired up to call, let's take a look at Java comments. Java comments are really handy when we are learning to code, as well as for experienced developers too.

Java comments

In programming, it is always a good idea to write messages known as code comments and sprinkle them liberally among your code. This is to remind us what on earth we were thinking at the time we wrote the code. To do this, you simply need to append a double forward slash and then type your comment like this:

// This is a comment and it could be useful

In addition to this, we can use comments to comment out a line of code. Suppose we have a line of code that we temporarily want to disable, then we can do so by adding two forward slashes, like this:

// The code below used to send a message
// Log.i("info","our message...