Ppt on data handling for class 2

Databases & Data Mining CPS 181s April 3, 2003. Databases in eCommerce The move to eCommerce is in part driven by the ability to gather data that benefits.

concurrent data access Client-Server Architecture  2-Tier architecture  Client  Application server & DBMS  Advantages  Rapid development  Mature tools  Less network traffic Server (Data Access)/Data assigned to categories called classes  Each piece of data is an object  Limited query capabilities, but handle non-text data well because enables the creation of new data types  Store binary large objects efficiently Hybrid Database  Object-relational systems  Handle both text and non-text data/

Java Programming: Guided Learning with Early Objects Chapter 10 Exception Handling and Events.

transactions Java Programming: Guided Learning with Early Objects36 Creating Your Own Exception Classes Java does not provide exception-handling classes for every possible circumstance Must throw programmer-defined exceptions using throw statement Define classes by extending the class Exception or a subclass Typically, constructors are the only methods included when defining exception class Programmer-defined classes inherit members of superclasses Java Programming: Guided Learning with Early Objects37 GUI/

1 Lecture 11(chap 14) Exception Handling & Thread Instructors: Fu-Chiung Cheng ( 鄭福炯 ) Associate Professor Computer Science & Engineering Tatung Institute.

areas of code that use shared data are synchronized When a set of /2), end_y, SIZE, SIZE); page.drawLine (x, start_y, x, end_y); } // draw_ball public boolean moving () { return length != 0; } // method moving public void bounce (Graphics page) { for (int count = 1; count < length; count += MOVE) { draw_ball(page); pause(); // for loop in previous example draw_ball(page); move(); } moving_up = !moving_up; length = (int) (DISTANCE * length); } // method bounce } // class Ball Conclusion Exception handling/

H3D API Training Part 3.2: Fields; Event Handling.

Data Field ◦ Single (SF) or Multiple (MF) data value ◦ Strongly typed ◦ Functional modification of data values (via update() function) ◦ getValue() and setValue() Access types  initializeOnly  outputOnly  inputOnly  inputOutput Event Handling  H3D API (and X3D) uses Fields for event handling/  Adds type checking to field routes.  Allows specification of input route types and resulting type. class DotProduct: public TypedField< SFFloat, Types > { virtual void update() { const Vec3f &v1 = static_cast/

HANDLING EXCEPTIONS Chapter 9. Outline  Learn about the limitations of traditional error-handling methods  Throw exceptions  Use try blocks  Catch.

function can contain code to check for errors, and then send a message when it detects an error.  an exception is an object that contains information that is passed from the place where a problem occurs to another place that will handle the problem.  an exception object can be of any data type, including a scalar or class type,  and a variety of exception/

© 2004 Pearson Addison-Wesley. All rights reserved April 24, 2006 Exceptions (part 2) ComS 207: Programming I (in Java) Iowa State University, SPRING 2006.

All rights reserved April 24, 2006 Exceptions (part 2) ComS 207: Programming I (in Java) Iowa /Pearson Addison-Wesley. All rights reserved Unchecked Exceptions An unchecked exception does not require explicit handling, though it could be processed that way The only unchecked exceptions in Java are objects/class to read input from a text file Lets now examine other classes that let us write data to a text file The FileWriter class represents a text output file, but with minimal support for manipulating data/

Sheet 3 HANDLING EXCEPTIONS Advanced Programming using Java By Nora Alaqeel.

the class ArithmeticException When a Scanner object is used to input data into a program, any invalid input errors are handled using the class InputMismatchException The class Exception is the superclass of all the exception classes in Java Java’s Mechanism of Exception Handling Java/- The program searches the catch blocks in the order in which they appear after the try block and looks for an appropriate exception handler Java Programming: From Problem Analysis to Program Design, 4e 13 try / catch / finally /

Data Structures and Java CS 105. 12/14/2015 Copyright 2005, by the authors of these slides, and Ateneo de Manila University. All rights reserved. L6:

rights reserved. L6: Abstract Class Slide 2 Review of Java Topics The following Java features play an important role when implementing data structures in Java Interfaces Exceptions The Java class hierarchy and the Object class 12/14/2015 Copyright 2005,/ Abstract Class Slide 10 More on Exceptions Different kinds of exceptions can be handled using a try-catch chain Can have a more elaborate exception class by defining exception/error details inside the class; for example: error message additional data about /

File Handling in QBASIC File handling is the process of writing records, reading records or editing records to/from an external data file. It an important.

records are stored Some of the syntax used during file handling in QBASIC. WRITE :- It is used to write the data to the data file. Syntax:- WRITE #1, [variable1],[variable2],….[variableN] 2. INPUT :- It is used to read the data from the data file. Syntax:- INPUT #1, [variable1],[variable2],….[variableN] Example 1. WAP to write the data name, class and roll number to an external file “std.txt/

Objects andVB Classes ISYS 350. What Is an Object? Objects are key to understanding object-oriented technology. There are many examples of real-world.

class can be based on an existing class, and will inherit that class’s interface and behaviors. The original class is known as the base class, super class, or parent class. The inherited class is called a subclass, a derived class, or a child class. Employee Super Class/.Text = testArrayList.Item(2)(1) TextBox4.Text = testArrayList.Item(3).Age End Sub For Each Loop with ArrayList /Data Private Sub Form5_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim obj As Object For/

FILE HANDLING(WORKING WITH FILES) FILE- A file is a collection of related data stored in a particular area on the disk. STREAMS- interface between the.

The input/output system contains set of classes that define the file handling methods. – Ifstream – Ofstream – Fstream These classes are derived from the fstreambase and the iostream class. OPENING AND CLOSING A FILE Suitable name for the file. Data type and structure. Purpose. Opening method. A file can be opened in two ways, 1.Using the constructor function of that class. 2.Using the member function open() of/

Object-Oriented Application Development Using VB.NET 1 Chapter 11 Using Multiple Forms with Problem Domain Classes.

declared with class scope Object-Oriented Application Development Using VB.NET 7 Adding Variables to the Generated Code Variables needed for this example –A Customer reference To create a new Customer instance from the data entered by the user –Three String variables To contain the customer data that is retrieved from the text boxes Object-Oriented Application Development Using VB.NET 8 Handling Events Push/

Csontos Péter, Porkoláb Zoltán Eötvös Loránd Tudományegyetem, Budapest ECOOP 2001 On the complexity of exception handling.

exception-handling Details on usage of our metrics  The call-flow graph of the program is created –Predicates and data handling (read and write instructions: assignment, function parameters) –Throwing of an exception is also handled as/ –Measuring completed projects –Trying to use this measure for project estimation  Applying other ortogonal paradigms –Aspect-oriented programming –Generic programming –Functional programming  More language parsers for the tool –Java parser and automatic measurement tool is/

CS 61B Data Structures and Programming Methodology July 7, 2008 David Sun.

printout. Connection to a remote server may die while your application is receiving data. – Physical Limitations Disk running out of space. Run out of available memory/. The exception handling mechanism looks for an exception handler that can deal with the error condition. Exceptions Exceptions are objects. All exceptions extend from the Throwable class. Pre-declared /, causing an unchecked exception When to Declare Exceptions Cases 1 and 2 are checked exceptions – You need to tell the programmers who will/

ALICE FMD Calibration Considerations 1 Overview ● The FMD ● FMD Calibration classes ● AliFMDParameters ● DCS `Conditions DB ● Calibration Procedures ●

Considerations The FMD detector: ● Silicon strip sensors ● 3 subdetectors... ●... with each 1 or 2 rings ● 51200 channels 2 FMD Calibration Data Classes 3 AliFMDI d #fDetector: UShort_t #fRing: Char_t #fSector: UShort_t #fStrip: UShort_t AliFMDCalibGainEntry #fValue/– ALTRO can zero suppress data, need to know this to read raw data. ● Pedestals – the pedestals subtracted in FEE ● Pulser value – for gain calibration LDC Calibration Procedures: Pedestals 7 DCS DB Pedesta l run Data CDB PedestalFinder > FEE DCS/

What is Data Handling? An Introduction Bridging the gap to.

half of sports-mad Birmingham pupils voted for the 100-metre sprint as their favourite event … But where did these headlines come from? What data do you think was collected? (What IS data?) … and … Do you think the headlines are always accurate? Do you believe them?! What is Data Handling? First things first – what IS data? This is data … In Class 6J, Height Number of Pupils less than/

C++ Programming Languages

support for concurrency, persistence, or distribution in C++ Compatibility with C libraries & traditional development tools As close to C as possible, but no closer C++ Enhancements C++ supports data abstraction & encapsulation e.g., the class mechanism & name spaces C++ supports object-oriented programming features e.g., abstract classes, inheritance, & virtual methods C++ supports generic programming e.g., parameterized types C++ supports sophisticated error handling e/

Safety Procedures.  Become familiar with:  Briefings – pre-operational and post operational  Communications  Hazardous Material Safety Data Sheets.

handle, and store chemicals, health hazards, precautionary measures to follow, and emergency procedures for/handling equipment must be bonded. Static Bonding  All hoses used in helitorch operations shall have bonding built into their structure.  Use only approved 1½” or 2” gasoline transfer hose.  Use only approved 2/ 3 gallon class B CAF or engine with class B foam /pre-operational and post operational  Communications  Hazardous Material Safety Data Sheets (MSDS)  Mixing hazards and PPE standards  /

1 Handling Exceptions COSC 1567 C++ Programming Lecture 11.

because in the program, userValue is assigned a valid value only when dataEntry() is completed Ex11-2.cpp 19 Catching Exceptions To avoid seeing this garbage value, you could take one of several /class can catch the thrown Employee object and handle it appropriately for the application 27 The Employee Class 28 Throwing Standard Class Objects A few possibilities include: –A program might assign default values to any Employee whose data entry resulted in an exception –A program that tests the accuracy of data/

File IO Includes Exceptions. Topics  General concepts  Exception handling  Creating a file in Eclipse  Use of Scanner class  Select a file (LineNumberer)

Handle errors in data format. Scanner in = new Scanner(reader); “in.txt” FileReader Scanner String int double etc. FileReader reader = new FileReader(“in.txt”); Prepare for/lines1.numberLines(); This is clearly not the most flexible option! Use sparingly! Option 2: prompt for names public void promptForInputFile() { Scanner scan = new Scanner(System.in); System.out/(); } Eclipse New Run Configuration Fill in Name, Project and Main Class as needed Select Run icon Press New Configuration Icon (be sure Java/

Chapter 16: Exception Handling C++ Programming: From Problem Analysis to Program Design, Fifth Edition.

catch block Data type of catch block parameter specifies type of exception that catch block can catch catch block can have at most one parameter C++ Programming: From Problem Analysis to Program Design, Fifth Edition 55 Summary (contd.) exception : base class for exception classes what returns string containing the exception object thrown by built-in exception classes Class exception is in header file exception runtime_error handles run/

1 Lecture 8 OOP Course. 9. Exceptions Error handling in C++ Error handling in C++

endl; }; Throwing Objects Why throw an object? –Additional data encapsulated –An object is created upon invoking the throw statement –Can be created with additional data, passed to Ctor –Object is destroyed after the catch / programmer-define ListException class #include using namespace std; class ListException: public exception{ public: ListException (const string& message = “”)‏ : exception(message.c_str()){} }; // end ListException 1 // A simple exception-handling example that checks for 2 // divide-by-/

12-2 Chapter Topics Chapter 12 discusses the following main topics: Part I: Exceptions Handling Exceptions Throwing Exceptions Part II: More about Input/Output.

12-2 Chapter Topics Chapter 12 discusses the following main topics: Part I: Exceptions Handling Exceptions Throwing Exceptions Part II: More about Input/Output Streams Binary Files,/s existing content will be preserved 12-54 Random Access Files The RandomAccessFile class has: the same methods as the DataOutputStream class for writing data, and the same methods as the DataInputStream class for reading data. The RandomAccessFile class can be used to sequentially process a binary file. Example: WriteLetters./

Java Foundation Classes (JFC/Swing) Carl Alphonce revised Spring 2007 (with contributions from Alan Hunt)

handling2  Observer pattern in Java An observer is called a listener in Java Button clicks are “ActionEvents”. Handlers for ActionEvents are ActionListeners. An event-generator can have many listeners Use “addActionListener” method to register a listener with a component JFC/Swing lectures Inner Classes  An inner class is a class defined inside another class.  An inner class/applications: the model holds data a view displays data from the model to user a controller handles user input and communicates /

SYNERGY 2007 Design Patterns and the Object Factory Miami Thursday, May 17th Peter Bragg, Care Data Systems.

iType Set piInstanceType to iType End_Procedure The Factory Class… // Returns or creates the correct instance of a type for this factory: Function Instance Returns Handle Handle hObj Integer iType iNewType Get phInstance to /2] function_return iRetVal end_function end_class A Simple Example class cLoginPrompts_sql is a cAbstractLoginPrompts Function DoFindLoginPrompts string sUser date dDate integer iDays returns integer[] integer[3] iRetVal //outstanding/today/future integer iFetchResult iCount iData handle/

1 Tirgul no. 12 Topics covered: H Binary Search Trees H Exception Handling in java.

the data inorder (sorted) 2.Search : search for the given data in the tree. 3.Insert : insert new data into the sorted tree. 4.Delete: delete new data from the tree 4 public class TreeNode { protected Comparable data; protected Node left,right,parent; public Node(Comparable data) { this.data = data;/Why do we use exceptions? H Make the code more readable - it separates the algorithm from error handling. H There are cases where returning a value to indicate errors is impossible or not reasonable - /

1 Classes with Pointer Data Members (II) Ying Wu Electrical Engineering & Computer Science Northwestern University EECS 230.

Engineering & Computer Science Northwestern University yingwu@ece.northwestern.edu EECS 230 Lectures Series 2 How to handle it? Classes with pointer data members are special, and need more attentions! How to handle it? –Destructor –Copy constructor –Assignment Assignment function Overloading = Using this Avoiding self-destruction Enabling cascading 3 Another Example Task: construct a class for string, instead of using char*. Everything seems easy. What should we pay/

Handling errors Writing robust code. 16/12/2004Lecture 10: Handling Errors2 Main concepts to be covered Defensive programming. –Anticipating that things.

); tryAgain = true; } 1. Exception thrown from here 2. Control transfers to here 16/12/2004Lecture 10: Handling Errors27 Catching multiple exceptions try {... ref.process();... } catch(EOFException/data. –Based around the byte type. The address-book-io project illustrates textual IO. 16/12/2004Lecture 10: Handling Errors37 Text output Use the FileWriter class/ file } 16/12/2004Lecture 10: Handling Errors39 Text input Use the FileReader class. Augment with BufferedReader for line-based input. –Open a file/

26-Jun-15 SAX. SAX and DOM SAX and DOM are standards for XML parsers--program APIs to read and interpret XML files DOM is a W3C standard SAX is an ad-hoc.

, such as element starts and ends interface DTDHandler Handles only notation and unparsed entity declarations interface EntityResolver Does customized handling for external entities interface ErrorHandler Must be implemented or parsing errors will be ignored! You could implement all these interfaces yourself, but that’s a lot of work--it’s easier to use an adapter class Class DefaultHandler DefaultHandler is in package org.xml.sax/

April 13, 2004Incident Handling (G. Berg & J. Gangolly)1 Incident Handling Week2: Computing & Network Basics for Forensics George Berg & Jagdish S. Gangolly.

J. Gangolly)1 Incident Handling Week2: Computing & Network Basics for Forensics George Berg & Jagdish S. Gangolly State University of New York at Albany April 13, 2004Incident Handling (G. Berg & J. Gangolly)2 Road Map How computers work? How data is represented in computers?/: http://www.albany.edu/~goel/classes/spring2002/MSI416/internet.ppt) TCP Connection Request TCP Connection Response Get http://www.ibm.com/index.html Index.html Hi Got the Time? 8:50 April 13, 2004Incident Handling (G. Berg & J. /

Exceptions. 2 Objectives Introduce C# exception handling –library exception types –custom exceptions Describe keywords used for exception handling –try.

and handled at higher level One()Two()Three()Divide()Main() call sequence problem occurs in Divide, search for error handler unwinds call sequence 4 Predefined exceptions.NET Framework defines many exception types –for common conditions –implemented as library classes –names end in Exception class ArithmeticException... {... } class FileNotFoundException... {... } class IndexOutOfRangeException... {... } class InvalidCastException... {... } class NullReferenceException... {... } class OutOfMemoryException/

Exceptions Objectives At the conclusion of this lesson, students should be able to Explain the need for exceptions Correctly write programs that use.

vector only contains 3 numbers? We will do several things to fix this problem. 1.We will create an exception class. 2. We will put a test in the getValueAt( ) method to test the index. If it is out of range/in main( ) to handle the exception. An Exception Class We use objects of our own exception class to report an exception. It is common for the exception class to contain data members that help to identify the problem, and functions to get that data from the object. class BadIndexException { private: int/

C ++ Programming Languages Omid Jafarinezhad Lecturer: Omid Jafarinezhad Fall 2013 Lecture 2 C ++ -overview Department of Computer Engineering 1.

support for concurrency, persistence, or distribution in C++ Compatibility with C libraries & traditional development tools As close to C as possible, but no closer C++ Enhancements C++ supports data abstraction & encapsulation – e.g., the class mechanism & name spaces C++ supports object-oriented programming features – e.g., abstract classes, inheritance, & virtual methods C++ supports generic programming – e.g., parameterized types C++ supports sophisticated error handling – e/

Introduction to C++ Templates and Exceptions l C++ Function Templates l C++ Class Templates l Exception and Exception Handler.

(); void Print() const; GList(); // Constructor private: int length; ItemType data[MAX_LENGTH]; }; Template parameter Instantiating a Class Template Class template arguments must be explicit. The compiler generates distinct class types called template classes or generated classes. When instantiating a template, a compiler substitutes the template argument for the template parameter throughout the class template. Instantiating a Class Template // Client code GList list1; GList list2; GList list3; list1/

Object-oriented Programming in Java. © Aptech Ltd. New Features in File Handling/Session 6 2  Describe the Console class  Explain the DeflaterInputStream.

 The java.nio package mainly defines buffers which are containers for data.  This API is easy to use. © Aptech Ltd. New Features in File Handling/Session 6 4  The Console class provides various methods to access character-based console device.  / from the root node.  File system include different characteristics for path separators. © Aptech Ltd. New Features in File Handling/Session 6 29 Files NIO.2 includes the following new package and classes:  java.nio.file.Path : This uses a system dependent/

Ray Konopka Introduction to the Microsoft.NET Framework for Delphi Developers.

for Delphi Developers 2 Agenda Delphi and.NET What is the.NET Framework?.NET Framework Core Features Writing.NET Managed Code Programming in Delphi for.NET Delphi and.NET What is the.NET Framework?.NET Framework Core Features Writing.NET Managed Code Programming in Delphi for/for managing collections of objects System.ComponentModel Types used to implement runtime and design features of components and controls System.Data ADO.NET data access classes/one using Graphics.FromHwnd( Handle ) If utilizing double-/

Java Programming, 2E Introductory Concepts and Techniques Chapter 3 Manipulating Data Using Methods.

Java Programming, 2E Introductory Concepts and Techniques Chapter 3 Manipulating Data Using Methods Chapter 3: Manipulating Data Using Methods 2 Objectives Identify, declare, and use primitive data types Use the System class to create data streams Instantiate the BufferedReader class in code Use the readLine() method to handle user input Chapter 3: Manipulating Data Using Methods 3 Objectives Convert strings to numbers using the parse() method Use assignment statements to/

Array. Definition Array is the most commonly used data storage structure; it’s built into most programming languages.

Classes The array.java program in Listing 2.1 essentially consists of one big method. We can reap many benefits by dividing the program into classes. ▫The data storage structure ▫The part of the program that uses this data structure By dividing the program into these two classes/(). These new methods don’t require an index number as an argument because the class takes responsibility for handling index numbers. The user of the class (HighArrayApp) is free to concentrate on the what instead of the how—what’s/

Liang, Introduction to Java Programming, Tenth Edition, (c) 2015 Pearson Education, Inc. All rights reserved. 1 Chapter 12 Exception Handling and Text.

Programming, Tenth Edition, (c) 2015 Pearson Education, Inc. All rights reserved. 2 Motivations When a program runs into a runtime error, the program terminates abnormally. How can you handle the runtime error so that the program can continue to run or terminate gracefully/but does not contain the methods for reading/writing data from/to a file. In order to perform I/O, you need to create objects using appropriate Java I/O classes. The objects contain the methods for reading/writing data from/to a file. This/

CPSC 252 Exception Handling Page 1 Exceptions and exception handling Client programmers can make errors using a class attempting to dequeue an item from.

#include #include // probably includes using namespace std; class AccessViolation : public logic_error { AccessViolation( void ) : logic_error( “Access violation” ) { } }; The what() method is declared in the exception class CPSC 252 Exception Handling Page 8 Now let’s think about how our dequeue/ data to read the data in the file is not a valid employee number CPSC 252 Exception Handling Page 13 Example of a use of exceptions (2) The last situation will occur if the file contains the following data, for /

Real-Time Java * Programming Christopher D. Gill Center for Distributed Object Computing Department of Computer Science Washington.

can uncover or exacerbate “bad” executions of existing race conditions –Horstmann & Cornell, ”Core Java 2” Need well defined thread and locking semantics Real-Time Java Programming Christopher D. Gill RTSJ: / problem w/deprecated Thread stop method // Data Store Query Code, Revisited public abstract class DataStore { /*... */ public abstract void annotateAlert (Alert a) throws javax.realtime.AsynchronouslyInterruptedException; } // In timer handling for // StoreThreadAdapter run () t.interrupt (); /

Object Oriented Programming (OOPs) Class Object Data Hiding Abstraction Encapsulation Polymorphism Inheritance Difference between Procedural and OOPs programming.

Polymorphism Inheritance Difference between Procedural and OOPs programming Advantages of OOPs 1.Deals with real life objects, so provide ease in programming. 2. Provides means for handling data security etc. 3. Promotes reusability of code, thus programming and testing becomes easy and fast. class emp { int empno; char empname[20]; float basic; public: void readdata() {cin>>empno; gets(empname); cin>>basic; } void displaydata() {cout< >empno/

System bus. Overview Computer components The von Neumann architecture is based on three key concepts: Data and instructions are stored in a single read-

module Computer Function Processing required for a single instruction is called an instruction cycle Simple POV (Point-Of-View): 2 steps –Fetch –Execute Fetch / Address Calculation Operand Fetch Data Operation Operand Store Interrupts Mechanism by which other modules may interrupt the normal processing of the CPU Classes –Program - as a/ Can be handled by disabling some or all interrupts. Disabled interrupts generally remain pending and are handled sequentially Can be handled by prioritizing interrupts/

V 1.1 Programming III. Creating additional windows Event handling: preview/routed events.

handling: preview/routed events V 1.1ÓE-NIK, 2015 2 Creating additional windows Two ways to display a new window: –Modal windows: “always on top”, the user cannot switch to another window (warning/error/confirmation or data input) –Non-modal windows: other windows can be used meanwhile the new window is open (special case: MDI) Possibilities: –MessageBox class/still open DIFFERENT than in Windows Forms! We must ALWAYS check for this value! 6 OpenFileDialog openFileDialog = new OpenFileDialog(); if (/

CS 157B: Database Management Systems II February 4 Class Meeting Department of Computer Science San Jose State University Spring 2013 Instructor: Ron Mak.

Class Meeting Department of Computer Science San Jose State University Spring 2013 Instructor: Ron Mak www.cs.sjsu.edu/~mak Department of Computer Science Spring 2013: January 30 CS 157B: Database Management Systems II © R. Mak 2 Referential Integrity  Referential integrity is database-speak for/ and many-to-many associations, and handle class hierarchies. Create and populate your database tables.  Use sample datasets downloaded from the Internet, or make up your own data.  You should not need to download/

TWC Adoption of RDA DTR and PID in Deep Carbon Observatory Data Portal Stephan Zednik, Xiaogang Ma, John Erickson, Patrick West, Peter Fox, & DCO-Data.

, which is resolvable by the global Handle System dco:RDF a dco:DataType. dco:DataType a owl:Class. TWC Future works More use case analyses relevant to data types in the DCO community Refine the schema for the annotation and provenance of specific data types A faceted ‘data type browser’ on the DCO Data Portal Interoperability between DCO specific data types and data types registered in other DTRs –The/

1 Streams Files are a computer’s long term memory Need ability for programs to –get information from files –copy information from program variables to.

2 More generally, streams manage flows of data between programs and any external entity that can provide or receive data ex. System.out 3 Stream Classes No class actually named Stream Collection of classes that provide mechanism to transfer data between programs and other external entities Distinction made between input and output streams Distinction between streams that handle/through a web browser Applications: Designed to be installed locally. For security of user’s files, web browsers generally do not /

Chapter 8: Exceptions and I/O Streams Presentation slides for Java Software Solutions Foundations of Program Design Third Edition by John Lewis and William.

the textbook may use and modify these slides for pedagogical purposes. 2 Exceptions and I/O Streams  Now we/for them  The PrintWriter class is needed for advanced inter - nationalization and error checking The Keyboard Class  The Keyboard class was written by the authors of your textbook to facilitate reading data from standard input as you began your study of Java  Now we can examine the processing of the Keyboard class in more detail  The Keyboard class: declares a useful standard input stream handles/

Introduction to Exception Handling and Defensive Programming.

2 Defensive Programming (Introduction) Code Complete puts it nicely It’s defensive driving. You are never sure what others will do We defend against others by Checking for invalid inputs Slide 3 Invalid Inputs All data from external sources should be checked In the routines (procedures) you create, check the input parameters too Apply an error-handling/ code is not compiled into the application Slide 32 The Debug and Trace Classes Both classes work the same way One is used to embed debugging code. The other/

1 Stacks and Queues Based on D.S. Malik, Java Programming: Program Design Including Data Structures.

Program Design Including Data Structures 2 Stacks  Lists /or exceptions  Queue overflow exception  Queue underflow exception  Classes that handle these exceptions  QueueException extends RunTimeException  QueueOverflowException extends QueueException /= 0; queueRear = maxQueueSize - 1; count = 0; list = (T[]) new Object[maxQueueSize]; }  Method initilializeQueue public void initializeQueue(){ for (int i = queueFront; i < queueRear; i = (i + 1) % maxQueueSize) list[i] = null; queueFront = 0; queueRear/

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