Que) What is the use of instance initializer block while we can directly assign a value in instance data member? For example:Why use instance initializer block?
Example of instance initializer block
What is invoked first, instance initializer block or constructor?Test it Now
Note: The java compiler copies the code of instance initializer block in every constructor.Rules for instance initializer block :
Program of instance initializer block that is invoked after super()Test it NowAnother example of instance blockTest it NowNext TopicFinal Keyword |
Write a Falling Blocks game in Javascript in 1 hour; so a few years ago I wrote a Falling Blocks game in Java, as a Java applet.
Instance Initializer block is used to initialize the instance data member. It run each time when object of the class is created. The initialization of the instance variable can be done directly but there can be performed extra operations while initializing the instance variable in the instance initializer block. The goal of Block Puzzle -Bloku is to drop blocks in order to create and destroy full lines on the screen both vertically and horizontally. Don't forget to keep the blocks from filling the screen. Basically, I have a Black Jack game. The user is given two random cards (then those cards are added together, and display the total). Then it prompts user if they want another card (They pretty much will want to have a total lower than 21). If they choose 'yes,' they are given a random card number (they can keep getting a card, but should avoid.
Java Block Based Coding
Your mission, should you decide to accept it, is to create a Java program that can play a game of Tic-Tac-Toe with the user. As you probably know, Tic-Tac-Toe is a simple game usually played with paper and pencil. First, you make a simple 3 x 3 grid on the paper. Then two players alternate.
What I did to write a Falling Blocks game
Well I have had it on my long to do list for a long time to rewrite in in Javascript. Game boy advance site. So last night that is exactly what I did.
And rather than re-inventing the wheel, or converting the applet or starting from scratch, I found this amazing video tutorial which talks you through how to build it in about 1 hour:
Here’s the game in playable form
Click here to play the game.
Bugs and changes
- Change – I added detection for the ‘up’ key – so that would rotate it not just the rotation keys.
- Bug – With not enough colours (1 too few) some of the blocks were disappearing then reappearing, by making sure the number of colours was correct this fixed the problem – and the block string
- The blocks were sometimes falling through the bottom – that was because I needed to replace the drop code with ‘playerDrop();’ and that resolved the problem
Thank you
Thank you to ‘Meth Meth Method’ for providing the tutorial video and helping me develop the code from your tutorial!
What’s next
Java Block Statement
On the to do list now is a sonic or mario style platform game, a Pac Man or ‘Oh Mummy’ style collection game, a outrun type racing game. I’d also like to create a version of a board game (one of the those escape room ones).