Strings Example 8

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Strings Example 8

• public String typeTextWithCapsAndCorrection(String
  delimiter)
• boolean Caps false
• String key, text
• clearDisplay()
• text ""
• key waitForKeyPress()
• while(key.compareToIgnoreCase(delimiter) !
  0)
• if(key.equalsIgnoreCase(""))
• if(Caps true)
• Caps false
• else
• Caps true
• else
• if(key.equalsIgnoreCase("Backspace"))
  
• if(text.length() gt 0)
• text text.substring(0,text.l
  ength() - 1)

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New javaphone version

• In the new version of the javaphone the following
  facilities have been included
• Battery always full charged by constructor
• Signal level always full signal
• Text typed on the screen wraps to multiple lines
  when necessary
• You can include \n in text being displayed on
  the screen to move on to the next display line
• The method setPrompt(String s) can be used to
  display a prompt on the bottom line of the
  screen. This does not interfere with text being
  typed by the user. For example
• setPrompt(Enter message) displays Enter
  message in the prompt area
• setPrompt() effectively clears the prompt area

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String class methods

• Within a string, locating the position of a
  character or a portion of text is possible using
  one of following
• indexOf(string) finds the first occurrence of the
  string (if there is one) starting from position
  zero
• indexOf(string, startPos) finds the first
  occurrence of the string (if there is one)
  starting from position startPos
• Both these methods return -1 if the string cannot
  be located.
• What do you think lastIndexOf(string) and
  lastIndexOf(string,startPos) do?

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String class methods

• Four other useful methods are
• startsWith(prefix) returns true if the string
  starts with the prefix
• startsWith(prefix, startPos) returns true if the
  string starts with the prefix from position
  startPos
• endsWith(suffix) returns true if the string ends
  with the suffix
• replace(oldstring,newstring)) repalces all
  occurrances of oldString with newStringtrue if
  the string ends with the suffix

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Strings Example 9

• public void split(String phrase)
• String word
• int startPos, spacePos
• phrase phrase " "
• startPos 0
• spacePos phrase.indexOf(" ",startPos)
• while(spacePos ! -1)
• word phrase.substring(startPos,space
  Pos)
• addToDisplay(word "\n") //
  display word and move to next line
• startPos spacePos 1
• spacePos phrase.indexOf("
  ",startPos)

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Strings Example 10

• public void usingTypeTextV1()
• clearDisplay()
• String text
• text typeTextWithCapsAndCorrection("enter")
  
• // add two blank lines to the output/display
• addToDisplay("\n\n")
• split(text)

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Strings Example 10

• public void split(String phrase)
• String word
• int startPos, spacePos
• phrase phrase " "
• startPos 0
• spacePos phrase.indexOf(" ",startPos)
• while(spacePos ! -1)
• word phrase.substring(startPos,space
  Pos)
• addToDisplay(word "\n") //
  display word and move to next line
• startPos spacePos 1
• spacePos phrase.indexOf("
  ",startPos)

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Strings Example 11

• public void usingTypeTextV2()
• String msgText, toNumber
• clearDisplay()
• setPrompt("Message")
• msgText typeTextWithCapsAndCorrection("e
  nter")
• clearDisplay()
• setPrompt("Number")
• toNumber typeTextWithCapsAndCorrection("
  enter")
• setPrompt("")
• clearDisplay()
• sendText(toNumber, msgText)

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Strings Example 12

• public void translateEnglishToPirateV0()
• String englishText, pirateText
• clearDisplay()
• englishTexttypeTextWithCapsAndCorrection("enter
  ")
• pirateText talkLikeAPirate(englishText)
• addToDisplay(" -- TRANSLATION -- "
  pirateText)

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Pirate Talk

• god my classmates are clever
• arrr by thunder me shipmates are smart as paint
  arrr
• how long have you been learning the java
  programming language
• arrr how long have ye been learning th' Tall Ship
  seafarin' clipper arrr
• my program crashed because of a bug
• arrr me vessel is marooned because of a mutiny
  arrr
• i used to be a c programmer
• arrr i used to be a son of a biscuit eater
  milksop arrr
• madam insulting the lecturer will not help you in
  the repeat exam
• arrr proud beauty bilge-sucking th'
  yellow-bellied sapsucker will not help ye in th'
  walk the blank hempen halter arrr

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(No Transcript)