Index

I

ICollection interface, 479

CopyTo method, 494

iterating through, 494

IDEs, 424

IDictionaryEnumerator interface, 733

iterating through elements of

Hashtable, 492

methods

MoveNext method, 492

Reset method, 492

properties

Key property, 492

Value property, 492

representing key-value pairs, 735

using with Hashtables, 492

IEnumerator interface

Current property, 491

methods

GetEnumerator method, 565, 570

MoveNext method, 490

Reset method, 490

System.Collections namespace, 490

if keyword, 795

if statements, 24

if-else statements, 24

nesting, 26

IList interface

predefined interfaces, 270

implementation

classes, 331, 621

requirements, enforcing, 255

space features, 736

interfaces, 258

compared to extending abstract classes, 261

is a relationship, 260

implicit keyword, 795

implicit type conversions, 22

in keyword, 795

foreach loops, 496

increment operators, 18

indentation

proper use of, 43

indexer property

ArrayList class, 480

Hashtable class, 483-484

String class, 449

indexes and arrays, 207

IndexOf method

ArrayList class, 481

String class, 451

information hiding, 118

inheritance, 89, 168, 247, 517

accessibility of inherited components, 518

as way of describing properties of an object, 180

base classes, 177

reusing behaviors, 520

benefits of, 177

cascading changes, 181

case studies

derived class constructor does explicitly invoke a base class constructor, 528

derived class constructor does not explicitly invoke a base class constructor, 527

derived class declares no constructors of Its own, 525

collections of supertypes, 228

constructors, 522

implied invocations of base(), 524

multiple inheritance, 191

multiple overrides, 185

overloading methods, 188

overriding methods, 182, 520

relationship notations, mixing and matching, 366

specialization, 175

super keyword, 185

superclasses, 175

UML representation, 351

initializeObjects method

CollectionWrapper class, 626

instance icons, 397

instance variable, 282

See also nonstatic attribute

instantiation, 76

abstract classes and, 252

arrays, 206

collections, 202

interfaces and, 267

objects, 80

reference variables, 80

instructors, recommendations for next steps, 763

int keyword, 795

int type, 12

Integrated Development Environments. See IDEs

interaction diagrams, 395

interface keyword, 795

interfaces, 256

as method headers, 257

implementing, 258, 264

importance of, 267

example 1, 268

example 2, 270

instantiation and, 267

predefined, 270

internal access modifier, 122

internal events, 391

internal keyword, 795

InvalidCastException class, 481

InvalidStudentIdException class, 462

IOException class, 459

Message property, 461

proper ordering of catch blocks, 459

System.IO namespace, 458, 507

is a relationship

See also inheritance

implementing interfaces, 260

is keyword, 795

IsCurrentlyEnrolledInSimilar method

Student class, 562

IsEnrolledIn method

Student class, 562

Items property

ListBox class, 705, 706