In the fast moving world of information technology, Java is now the number 1 programming language. Programmers and developers everywhere need to know Java to keep pace with traditional and web-based application development. COBOL Programmers Swing with Java provides COBOL programmers a clear, easy transition to Java programming by drawing on the numerous similarities between COBOL and Java. The authors introduce the COBOL programmer to the history of Java and object-oriented programming and then dive into the details of the Java syntax, always contrasting them with their parallels in COBOL. A running case study gives the reader an overall view of application development with Java, with increased functionality as new material is presented. This new edition features the development of graphical user interfaces (GUI's) using the latest in Java Swing components. The clear writing style and excellent examples make the book suitable for anyone wanting to learn Java and OO programming, whether they have a background in COBOL or not.

Bill C. Hardgrove is Associate Professor of Information Systems and Executive Director of the Information Technology Research Center, and he holds the Edwin & Karlee Bradberry Chair at the University of Arkansas.

Preface

xiii

Introduction

1

(2)

Chapter 1 Why You Should Learn Java

3

(18)

Objectives

3

(1)

History and Overview of Java

4

(2)

The Popularity of Java

6

(2)

What Makes Java Different?

8

(4)

Java Is Simple

8

(1)

Java Is Object-Oriented

9

(1)

Java Is Portable

10

(2)

Will Java Replace COBOL?

12

(4)

How to Use This Book

16

(2)

Summary of Key Points in Chapter 1

18

(1)

Bibliography

19

(2)

Chapter 2 An Introduction to Object-Oriented Programming

21

(20)

Objectives

21

(1)

The Community National Bank

22

(1)

History of OO

22

(2)

Objects

24

(1)

Classes

25

(1)

Diagramming Classes and Objects

26

(2)

Class Relationships

28

(1)

Inheritance

29

(6)

Aggregation

32

(2)

Association

34

(1)

Object Communication

35

(2)

Polymorphism

37

(1)

Dynamic Binding

38

(1)

Summary of Key Points in Chapter 2

39

(1)

Bibliography

40

(1)

Chapter 3 Java Structure

41

(25)

Objectives

41

(1)

A Class Program

42

(5)

Listing 3.1: Customer.java

44

(3)

Java Column Restrictions

47

(1)

Writing Comments in Java

47

(2)

Naming Rules and Conventions

49

(1)

Creating Objects

50

(4)

Listing 3.2: Customer.java

53

(1)

Invoking Methods

54

(4)

Listing 3.3: CustomerProcessor.Java

56

(2)

Working with Subclasses

58

(6)

Listing 3.4: Account.java

58

(2)

Listing 3.5: CheckingAccount.java

60

(2)

Listing 3.6: AccountProcessor.java

62

(2)

Summary of Key Points in Chapter 3

64

(2)

Chapter 4 Defining Data

66

(16)

Objectives

66

(1)

COBOL Picture Clause

67

(1)

Defining Java Variables

68

(2)

Writing Java Literals

70

(1)

The Scope of Variables

71

(1)

Defining Java Constants

72

(1)

String Variables

72

(4)

Listing 4.1: StringDemo.java

74

(2)

Changing Variable Types

76

(3)

Listing 4.2: CastDemo.java

77

(2)

Variables for Community National Bank

79

(1)

Summary of Key Points in Chapter 4

80

(2)

Chapter 5 Computation

82

(26)

Objectives

82

(1)

Exceptions

83

(4)

Listing 5.1: try-catch Structure

85

(1)

Listing 5.2: ArithmeticExceptionDemo.java

86

(1)

Custom Exception Classes

87

(5)

Listing 5.3: CheckingAccount.java with NSFException

89

(2)

Listing 5.4: AccountProcessor.java with try-catch

91

(1)

A Review of Primitive Data Types

92

(1)

Wrapper Classes

93

(5)

Listing 5.5: WrapperDemo.java

96

(2)

Arithmetic Operators

98

(1)

The Math Class

99

(5)

Listing 5.6: MathClassDemo.java

103

(1)

The NumberFormat Class

104

(3)

Listing 5.7: NumberFormatDemo.java

105

(2)

Summary of Key Points in Chapter 5

107

(1)

Chapter 6 Decision Making

108

(21)

Objectives

108

(1)

Service Charges at Community National Bank

109

(1)

The if Statement

109

(3)

Using the else Clause

112

(2)

Nested if Statements

114

(1)

Writing Compound Conditions

115

(1)

Java's Conditional Operator

116

(1)

Condition Names

117

(1)

Computing the Service Charge with if Statements

118

(3)

Listing 6.1: COBOL Service Charge Computation Using IF Statements

119

(1)

Listing 6.2: ComputeServiceCharge method Using if Statements

120

(1)

Case Structure: COBOL EVALUATE and Java switch

121

(2)

Computing the Service Charge Using switch

123

(3)

Listing 6.3: COBOL Service Charge Computation Using EVALUATE

123

(2)

Listing 6.4: Java Service Charge Computation Using switch

125

(1)

Summary of Key Points in Chapter 6

126

(3)

Chapter 7 Loops

129

(22)

Objectives

129

(1)

Loop Structure

130

(1)

The COBOL PERFORM Statement

130

(2)

The Java while Statement

132

(5)

Listing 7.1: WhileLoopDemo.java

135

(2)

The Java do Statement

137

(3)

Listing 7.2: DoLoopDemo.java

139

(1)

The Java for Statement

140

(3)

Listing 7.3: ForLoopDemo.java

142

(1)

Nested Loops

143

(2)

Java break and continue Statements

145

(1)

Producing a Loan Amortization Schedule

146

(3)

Listing 7.4: Amortizer.java

147

(2)

Summary of Key Points in Chapter 7

149

(2)

Chapter 8 Arrays

151

(22)

Objectives

151

(1)

Declaring One-Dimensional Arrays

152

(3)

Populating One-Dimensional Arrays

155

(2)

Creating String Arrays

157

(3)

Listing 8.1: OneDimArrayDemo.java

158

(2)

Declaring Two-Dimensional Arrays

160

(2)

Populating Two-Dimensional Arrays

162

(4)

Listing 8.2: TwoDimArrayDemo. ava

163

(3)

Passing Arrays as Arguments

166

(1)

Searching Arrays

167

(4)

Listing 8.3: FindZipCode. ava

168

(1)

Listing 8.4: ZipCodeProcessor.Java

169

(2)

Summary of Key Points in Chapter 8

171

(2)

Chapter 9 Data Access

173

(24)

Objectives

173

(1)

Java's I-O Class Library (java.io)

174

(1)

Object Persistence

175

(1)

Sequential File I-O

175

(6)

Listing 9.1: SequentialFileDemo.java

179

(2)

Database Access

181

(8)

Listing 9.2: COBOL SQL Example

182

(6)

Listing 9.3: DatabaseDemo.java

188

(1)

Object Serialization

189

(6)

Listing 9.4: ObjectSerializationDemo.java

193

(2)

Network Access

195

(1)

Summary of Key Points in Chapter 9

195

(2)

Chapter 10 Graphical User Interfaces

197

(32)

Objectives

197

(1)

Java's Swing Components

198

(1)

Event-Driven Programming

199

(2)

JFrame: Displaying and Closing a Window

201

(2)

Listing 10.1: CustomerGUIOne.java

201

(2)

JLabel: Adding Labels to a Window

203

(2)

Listing 10.2: CustomerGUITwo.java

203

(2)

JTextField: Adding Text Fields to a Window

205

(4)

Listing 10.3: CustomerGUIThree.java

206

(3)

JButton: Adding Buttons to a Window

209

(4)

Listing 10.4: CustomerGUIFour.Java

209

(4)

How Java Handles Events

213

(1)

Improving the Window Layout

214

(6)

Listing 10.5: CustomerGUIFive.java

215

(5)

Creating Drop-Down Menus

220

(5)

Listing 10.6: CustomerGUISix.Java

220

(5)

Writing Applets

225

(2)

Summary of Key Points in Chapter 10

227

(2)

Chapter 11 Object-Oriented Development Issues

229

(19)

Objectives

229

(1)

Developing Object-Oriented Systems

230

(1)

OO Methodologies

231

(1)

OO Analysis

232

(1)

OO Design

233

(2)

Three-Tier Design

235

(11)

Architecture Issues

246

(1)

Performance Issues

247

(1)

Summary of Key Points in Chapter 11

248

(1)

Bibliography

249

(2)

Glossary

251

(9)

Index

260

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