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Printing to Console

Sometimes the game or application might not work the way you expect it to or you want to write something to the console for logging purposes. Outside of debugging the application, you can use System.out.println() to write your message. Lookout for your messages in the “logcat” window at the bottom of Android Studio: Logcat window in Android Studio showing messages created using the System.out.printIn logging function

Working Together

  1. Without removing the quotation marks, try changing "Restarting the Tac-Tic-Toe Game!" to "Restarting the Tic-Tac-Toe Game!" or any other sentence you like. Press run to see if anything changes.
  2. Add another System.out.println below the current line to print a second sentence below the first sentence.
  3. Press run to see if two sentences are printed out. If you see any red text, please ask for help.

HELP! I got a lot of red text!

If you see any red text, you have encountered some errors! Please ask for help. Beware of the following when coding in Android:

  1. out and println start with a lowercase letter.
  2. System starts with an uppercase letter.
  3. Make sure the sentence you wish to print is surrounded in quotation marks, and that the sentence is between the parentheses.
  4. Do not delete any curly braces { or }.

System.out.println is helpful when you want to fix bugs in code, but your user (the person using the app) can’t see text printed with this function. But we can do this with toasts! A toast is a quick, small text that we make visible to the user. Here’s how to make a toast:

Toast.makeText(this, "Text we want to show", Toast.LENGTH_SHORT).show()
toast example. You can use the toast.makeText function with arguments context, the message string, and Toast.LENGTH_LONG or Toast.LENGTH_SHORT to display a welcome message, such as Welcome to Tic-Tac-Toe