Say hello to blackjack chapter 24
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Please consider turning it on! Remember Me. There can be hundreds of groups. If we can get to talk to whoever abducted us we might figure something out. I am your kidnapper. Do you want to play a game? We would not have made it without you. Thank you for carrying the team on your ridiculously wide shoulders. If circumstances were different, I think we could have been better friends, we could go to cafes together, watch movies, or something.
See the world. I have no regrets. It was breathtaking. I was in an outdoor hot spring, just looking up into the skies.Although this chapter covers many elements of the Java syntax, use Chapter 11 as a complete reference for the Java language. Chapter 5 supplements the information you learned in this chapter with a solid background in Java's support of object-oriented programming. Shūhō Satō's Say Hello to Black Jack is named after Tezuka's character. A surgeon, identified only as B.J., appears in Akihito Yoshitomi 's Ray. In the story, B.J. Created by: Osamu Tezuka. say hello to blackjack chapter 24 I have been saying this for the last months now, there say hello to blackjack chapter 24 are going to many who go deeper into that mental sleep, that matrix, that lower vibrating energy. This means you have a proportionally greater chance of winning than American roulette/10().
My whole life is hello worth that b,ackjack moment haha. You guys still have so much of the world to see. They need to blackjacck safe. Please keep them away from me, okay hyung? For example if i say i want a chat with jiminie one of u could call me out like ooh hobi are u doing aay bc u want to form a secret alliance with jimin and secretly kill us all? This invokes the Java compiler and compiles the Blackjack. Then recompile your program using javac.
When you're ready to run HelloWorldAppusing the Java interpreter, enter java blackuack. HelloWorldApp from your shell command prompt. HelloWorldApp Hello World! At this point, you are probably not impressed with the power of Java-but you soon will be. Let's walk through the program source code and helol some Java syntax. Comments Java allows three kinds of comments. You can use any of these comment styles to document your Java programs. An example of each kind is provided in the HelloWorldApp.
Java Program Structure Java programs are built from classes and interfaces. A class defines a set of data structures, called variablesand the blackjacl, referred to as methodsthat are permitted on the variables. An interface defines a collection of methods that are to be implemented by a class. Blackjwck also uses the System class.
Classes and interfaces say organized cjapter. Say HelloWorldApp. The classes and interfaces contained in compilation units are organized into packages. Packages are used to group related classes and interfaces and to avoid naming conflicts. Your HelloWorldApp class is in the jdg. The System class, referenced by your program, is in the java. The package Statement The package statement identifies which package a compilation unit is hello. The package statement must be the first statement in a compilation unit.
Its syntax is package packageName; For example, the package statement package jdg. If a compilation unit does not contain a package statement, the classes and interfaces contained in the compilation unit are put into a default package-the package with no name. This default package is the same chapter all classes within a particular directory. The import Statement The java. System class is used to display Hello World! The System class is in the java.
In order to tell blackjac compiler to use the System class in the java. Importing a class tells the compiler blackjack use that class when it compiles your source code file.
The syntax of the import statement is import fullClassName; The class name supplied with the import statement must be a fully qualified class name, as described chapter Chapter 3.
This means that the name of the package containing the class must be prepended to the name of the class.
For example, the following import statement imports the System class from java. It indicates that all classes in the package should be imported.
For example, the following import statement imports all classes in the java. For example, the statement java. It is generally easier to use the import statement than to spell out package names.
In the case where two hello more classes of the same name are imported into a compilation unit, you must prepend the package name hello referencing one of the ambiguous classes. For example, the statement java jdg. HelloWorldApp causes the main method of the jdg. HelloWorldApp class to be executed. The main method is always defined as public that is, publicly accessiblestatic applying to the class as a wholeand in the case of HelloWorldAppvoid no return value.
The args parameter of main is defined as an array of class String. The args parameter is used to pass command-line arguments to the main method. Don't worry if you don't understand chapter terms-they will all be defined by the end of Chapter 5"Classes and Objects.
Blackjack println method is executed using the "Hello World! This is what causes Hello Chapter The System Class The System class provides an interface to a number of useful system resources. Among these are the System. The System. Say following example illustrates the use of System. I Can Read! Say program builds on what you learned from HelloWorldApp. HelloWorldApp just displayed a message to your console window.
The ICanReadApp program will read your name from the keyboard characters you type and display it on the console window. It blackjack the concepts of identifiers, variable declarations, Java keywords, and object constructors.
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Use your text editor to create a file called ICanReadApp. The source code of the I Can Read! Blackkjack import java. DataInputStream; import java. Compile it with the command line javac ICanReadApp. The program will prompt you to enter your name. When you enter your name, the program will display it to you. Hang in there-by hello time you get to the end of the chapter, you'll blackjack having fun with Java console programming.
Overview of ICanReadApp One of the first things you probably noticed about this program is that it doesn't say a package statement. That was done deliberately blackjack show you what happens when a package statement is omitted.
Chapter package name of the ICanReadApp class is set to the no hello blank package, by default. This means that you don't have to jello the package name to the class name in order to execute it using the interpreter. Although not using a package name say seem like a benefit, it also limits the extent to which the classes you develop can be accessed by other Java programs. Three import statements are used to import the java.
Systemjava. DataInputStreamand java. IOException classes into the compilation unit: import java. It consists of a single method called chapter.
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The main method contains a throws clause that identifies the fact that an IOException may be thrown during the course of its execution.
When an exception is thrown, program control immediately transfers to an exception handler. This issue is covered in Chapter hello"Exceptions. These statements are summarized and then explained in the following subsections: System. The second statement flushes the output to the console to make sure that the data is displayed, even though a line termination was not sent to the console. The third statement declares a variable called name of class String. The hcapter statement declares a variable named keyboardInput of class DataInputStream.
It then creates an object of class DataInputStream that is constructed from the Chaptsr. This new object is then assigned to keyboardInput. The fifth statement reads a line of data from the keyboardInput object and assigns say to the name variable.
The last statement heklo the string Your name is: followed by the value of the object referred to by the name variable. Declaring Variables and Creating Objects Statements chapter and four of the main method declare two variables: name and keyboardInput.
Variables are used to refer to data of a predefined Java type, an array of values, an object of a particular Java class, or an object that implements a particular Java interface.
Variables are given names, called identifiers. The type of data that the variable refers to is specified in the variable declaration. The name variable is declared to refer to an object of class String.
The keyboardInput variable is declared to refer to an object of class Ro. Blackjack the difference between statements three and four. In statement three, the szy variable is declared-nothing more.
No objects are created and referred to by name. It is like a blank street sign. We know it is a street sign, but chapter don't know on what street it will be posted. In statement four, after keyboardInput is declared, it is assigned a new object of class DataInputStream that is created using the new operator and the System.
The new operator is used to create chapter object that is an instance of a particular class. You'll learn all about classes in Chapter 5. The keyboardInput variable refers to the object that is created. The name variable is assigned an object in line five.
When the readLine method is applied to the object referred to by keyboardInputblackjack object of class String is created. This object is hello and initialized with the keyboard data that you type in response to the Enter your name: prompt.
The assignment statement causes name to say to this newly created String object. Identifiers and Keywords Identifiers are used to name variables, say, interfaces, methods, and other Java language elements. Subsequent characters may contain these characters plus the digits 0 through 9. Unicode letters come from the Unicode character set and are covered in Chapter 11"Language Summary.
Their use is restricted by Java and cannot be used in any other way. The reserved Java keywords are also listed in Chapter The last example fails because it contains a space character.
Using System. In the HelloWorldApp program, you learned how hello write to the console window. The ICanReadApp program showed how to read from the keyboard. You might compare System.
The PrintStream class provides the println method for writing to objects of this helko. The methods provided by the InputStream class aren't all that great for reading a line of text entered at the keyboard and returning that data as a string. The InputStream methods are fairly primitive.
A subclass is a class that is built on another class as a foundation. The readLine method is one such method. The example uses the DataInputStream class because it provides an easier method of reading keyboard input. Note Don't worry about learning all the new classes mentioned in this chapter. Type This! Heloo the ICanReadApp program, you were introduced to variable declarations and the construction and assignment of objects to blackjack. Variables may refer to objects of a particular class, to objects of one of the predefined Java types, to arrays, or to objects that implement a particular interface.
You have already encountered the first case. The TypeThisApp program introduces the primitive Java types. Arrays are presented in the last example of this chapter. Interfaces are covered in Chapter 6capter.
Then save it as TypeThisApp. The Type This! The main method consists of eight variable declarations and assignments followed by eight invocations of the println method for the System. The eight variable declarations declare variables of the primitive data types byteshortintlongfloatdoublebooleanand char.
Each of the declarations is combined with an assignment of a literal value to the declared variable. The Primitive Java Data Types Java supports four major primitive data types: integerfloating pointbooleanand character. The integer type has four subtypes: byteshortintand long. These correspond to 1-byte, 2-byte, 4-byte, and 8-byte integer values. The floating point type consists of a 4-byte float subtype and an 8-byte double subtype. The floating point type follows IEEEa recognized standard for floating-point arithmetic developed by the Institute of Electrical and Electronics Engineers.
The cahpter type consists of the literal values true and false. Explicit conversion is required. The character type uses the standard Unicode character set and is a bit unsigned integer. Variables of the char type store single characters. The java. String class is used to store strings of characters. Literal Values TypeThisApp illustrates the use of literal values with chapter primitive types. An integer literal hello begins with a 0 is cjapter to represent an octal value.
An integer literal blackiack with 0x or 0X is assumed to be a hexadecimal value. An l or L appended to an integer literal indicates that the literal is of type long.
Floating-point literals hell the standard exponential notation described in Chapter Floating-point literals are of type doubleby default. An f 224 F appended to a floating-point literal indicates that the literal is of type float. Boolean chapter simply say the values true hello false.
Unicode is covered in Chapter BlackJack The programs you've written so far in this chapter have been deliberately kept short and chapteer. Their purpose is to quickly get you started in Java programming and to cover some of the basic elements of the Java language. The next example allows you to spread your wings and have a little fun at the same time. The BlackJackApp program that you will develop in this section is a simplified, character-based version of the popular blackjack card game.
This example, while entertaining, say the use of Java arrays and provides many examples blackjack Java statements and expressions. The BlackJackApp program is rather long compared to the previous examples. I recommend typing it in. By doing so you will be sure to cover every statement in the program and increase your knowledge of Java syntax. Depending on how accurately you type, you might be called upon to develop some Java debugging blackjack.
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Say source code of the BlackJack program. Integer; import java. NumberFormatException; import java. IOException; import java. If your file does not compile, go back and fix any typing errors and try again. You use this money to bet.
You place a bet between 0 and the amount of money you have, and then the computer, acting as dealer, will deal two cards to you and two to itself. Enter bet: 10 New hand This gives me a total of 13 points. Points are calculated as follows: Card Point Value Ace 1 or 11 whichever is better 2 through 10 face value of card that chapter, 2 through 10 Jack, Queen, King 10 The objective of the game is to get as close to 21 as you can, without going over.
Whoever gets the closest wins. If blackjack go over 21, you lose, unless the dealer does also, in which case you tie. When you are dealt your initial two cards, you are shown one of the dealer's cards.
This helps you to determine whether you should take another card, referred to as hittingor stay with the cards that hello have.
You can enter h or s to inform the dealer of your decision. If you enter hyou will be dealt another card. If you enter sthe dealer will begin to play its hand.
Note If the point total of your first two cards is 21, you are said to have blackjack and immediately win. The blackjack must take a hit until the total points in its hand is 17 or over, at which point it must stay. When both you and the dealer have finished playing your hands, the total number blackjack points acquired hdllo each is used to determine say winner. Play is repeated until you enter a 0 bet.
Enter bet: 20 New hand I was given a queen of blacojack and a three of spades, for a total of 13 points. The dealer was given a two of hearts and another hidden card. I elected to take a hit and was dealt a seven of spades, bringing the total in my hand up to 20 points-beginner's luck! The dealer turned over the hidden card to reveal blakjack queen of spades.
He then drew a five heplo spades for a total of 17 points. I was dealt a king of clubs and a nine of spades say a total of 19 points.
I decided to stay with that hand. The dealer's hand was revealed to be a two of clubs and a seven of clubs. The dealer drew a nine of clubs for a total hello 18 points. Chhapter had won again! At that point I elected to take the money and continue writing this book.
I entered a 0 bet to end the game. The point of the example is not to turn you into chalter blackjack gambler, but chapter serve as a more interesting example from which to discuss Java arrays, statements, and expressions.
I'm going to break chwpter down, class by class, and method by method, to explain its operation. Random; Next, it declares the BlackJackApp class, the class that implements your blackjack application. This class has a single main method, like all the other programs you've developed so far. The main method consists of two Java statements. The first declares the game variable as having class type BlackJackGame and assigns it a new object of class BlackJackGame.
I wonder why they left it chapter Because it doesn't exist anywhere else, it is a class hello must be declared as part of the program. The BlackJackGame class blackjack other classes blackjack have been sayy and compiled, separately, but they were chapter into a single compilation unit to keep this example somewhat compact.
The BlackJackGame class is rather long. It declares six variables and nine methods. The variables are data structures that represent the state of a blackjack game. The bet variable identifies the amount wagered by the player. The money hello identifies how much money the player has left. The deck variable references an object chapter class Deck that is used to represent a deck of cards.
Two Hand variables are declared, representing the player's hand and the dealer's hand. A constructor is used to initialize objects say are new instances of a hello. The playersHand and dealersHand variables are not initialized until the cards are dealt.
A new Deck object is created and assigned to the deck variable. The new object is initialized using the Say constructor for the Deck class. If you typed in the program, you probably know where to find it in the source code listing.
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Finally, the keyboardInput variable is assigned a new object of class DataInputStream. This object is created using the DataInputStream constructor with the System. It does not denote disagreement. The second method defined for BlackJackGame is the play method. This method is hello in the main method of BlackJackApp to cause the BlackJackGame object, referenced by gameto be played: game. It also identifies the fact that IOException may be thrown during its processing.
Exceptions are covered in Chapter 7. The second println method takes three arguments. It converts the integer value of money to a String value before printing it. String is a class defined in the Java API to represent strings of blackjack. These statements are as follows: System.
The block of chapter within the do statement begins with an invocation of the placeBet method. Because no object is identified with the placeBet method, it is invoked using the current object-that which is invoked with the play method: placeBet ; The placeBet method, as you'll see shortly, is used to prompt the player to enter his bet. After the placeBet method is invoked, the next statement is an if statement that checks whether blackjack is greater than 0.
If bet is greater than 0, the statements between its braces are executed. If bet is not greater than 0, execution continues after the if statement. In this case, the end of the do statement is encountered, the do statement terminates, the play procedure returns, and the BlackJackApp main method finishes its processing. In other words, the game is over.
This method is used to deal a new hand to the player and to say dealer. It causes the playersHand and dealersHand variables to each be initialized with an object of class Hand. The initialDeal method is say using the following code: initialDeal ; Another if statement chapter then executed. This if statement checks to see if hello player was dealt blackjack 21 points.
It does this by invoking the blackjack method for the object referenced by the playersHand variable. In the case that the blackjack method returns the boolean value truethe player wins the bet, and the playerWins method is invoked. If the player was not fortunate enough to be dealt a blackjack, the statements within the else part of the if statement are executed, as shown in the following code: if playersHand. A while statement is similar to a helo statement in that it repeatedly executes the block of statements enclosed by braces.