COMP 110 Errors, Strings, and Review

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COMP 110Errors, Strings, and Review

• Tabitha Peck M.S.
• January 28, 2008
• MWF 3-350 pm
• Philips 367

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Announcements

• Project 1 Due Wednesday
• Lab 1 Grades
• Resubmit Lab2 if you want

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PIXAR   Technical Challenges in the Production
Pipeline

• Susan FisherPixar Animation Studios
• 1230 pmTuesday, January 29, 2008Sitterson Hall
  011

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Questions?
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Today in COMP 110

• Errors
• Strings
• Review

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Errors

• Syntax error - grammatical mistake in your
  program
• Run-time error - error that is detected when your
  program is run
• Logic error - the output of your program is
  incorrect

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String Indices
String output myString.substring(1, 7)
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Escape Characters

• System.out.println(How do I put \quotes\ in my
  string?)

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I/O (Input/Output)

• System.out.print(this is a string)
• System.out.println(this is a string)
• What is the difference?

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Keyboard Input

• Scanner Scanner_object_name new
  Scanner(System.in)
• Scanner_object_name.nextLine()
• Scanner_object_name.nextInt()
• Scanner_object_name.nextDouble()
• See p. 93
• Make sure to read Gotcha on p. 95

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Documentation and Style

• Meaningful names
• Indenting
• Documentation
• Defined Constants

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Defined constants

• public static final Type Variable Constant
• Named in ALL_CAPS
• public class DefinedConstant public static
  final double PI 3.14159 public static void
  main(String args)

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Wednesday

• Read 3.1
• Project 1 Due

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Java is an OOP language

• Object-Oriented Programming Language
• Objects and methods

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Encapsulation

• Information hiding
• Putting things in a capsule
• Methods in the String class
• myString.length()

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Polymorphism

• Many forms
• int int
• double double
• String String

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Inheritance

• Organizing classes so properties only have to be
  defined once