Leaving comments in our Java code

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

// This is a comment and it could be useful

In addition, 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, as follows:

// The code below used to send a message
// Log.i("info","our message here");
// But now it doesn't do anything
// And I am getting ahead of where I should be

Tip

Using comments to comment out code should only be a temporary measure. Once you have found the correct code to use, commented-out code should be cut to keep the code file clean and organized.

Let's look at two separate ways to send messages in...