HANGMAN

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HANGMAN
Project by Lori Kraus 12/3/03
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• Weve played the game, now lets see what goes on
  behind the scenes.
• 
  
• O
• \ /
• d b
• but first, a few new
  things

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Creating an Array

• 2 ways
• type arrayName new typelength
• arrayName0 item1
• arrayName1 item2
• type arrayName item0, item1, , itemN
• Heres what I did
• private String wordBank "computer",
  "science", "project", "object", "binary",
  "application", "applet", "website", "method",
  "variable"

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Generating a Random Number

• class Math
• Random numbers
• Math.random( ) produces a double value between
• 0 and 1
• Max and min
• Exponents
• Square roots, etc.
• Heres what I did
• randomNum
• (int)((Math.random( ) 1000) 10)

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Other Useful Methods

• int length String word char wordArray
• length word.length( )
• assigns the value of the length of the word to
  int length
• wordArray new charlength
• creates character array wordArray same length as
  word
• word.getChars(0, length, wordArray, 0)
• puts characters from 0 to length of String word
  into wordArray, starting at index 0

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System.out.println

• Suppose int answer 5
• We know
• System.out.println(answer answer)
• will look like answer 5
• There are also ways to print things on new lines
  (/n), at the tabs (/t), etc.
• For example
• System.out.println(answer /n answer)
• will look like answer
• 5

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• Heres what I did
• System.out.println("\nYou win!\n")
• It looks like
• You win!
• Also, in order to print a backslash ( \ ), you
  have to type
• System.out.println(\\)

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Getting Input From the Console

• class System
• System.in is the stream corresponding to the
  keyboard input
• class InputStreamReader
• Reads bytes and translates them into characters
  according to a specified character encoding
• class BufferedReader
• Reads text from a character-input stream,
  buffering characters so as to provide for more
  efficient reading
• Method readLine( ) returns a String containing
  the contents of the particular line

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Common Example

• BufferedReader inputGuess new BufferedReader (
  new InputStreamReader (System.in))
• System.out.print("\nGuess a letter")
• String guess inputGuess.readLine( )
• This takes whatever letter the user types in and
  stores it into the String guess

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• Now lets look at the code!