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    Programming in Scala
    Copyright
    Dedication
    List of Figures
    List of Tables
    List of Listings
    Foreword
    Foreword to the First Edition
    Acknowledgments
    Introduction
    Chapter 1: A Scalable Language
    Chapter 2: First Steps in Scala
    Chapter 3: Next Steps in Scala
    Chapter 4: Classes and Objects
    Chapter 5: Basic Types and Operations
    Chapter 6: Functional Objects
    Chapter 7: Built-in Control Structures
    Chapter 8: Functions and Closures
    Chapter 9: Control Abstraction
    Chapter 10: Composition and Inheritance
    10.1 A two-dimensional layout library
    10.2 Abstract classes
    10.3 Defining parameterless methods
    10.4 Extending classes
    10.5 Overriding methods and fields
    10.6 Defining parametric fields
    10.7 Invoking superclass constructors
    10.8 Using override modifiers
    10.9 Polymorphism and dynamic binding
    10.10 Declaring final members
    10.11 Using composition and inheritance
    10.12 Implementing above, beside, and toString
    10.13 Defining a factory object
    10.14 Heighten and widen
    10.15 Putting it all together
    10.16 Conclusion
    Chapter 11: Scala's Hierarchy
    Chapter 12: Traits
    Chapter 13: Packages and Imports
    Chapter 14: Assertions and Unit Testing
    Chapter 15: Case Classes and Pattern Matching
    Chapter 16: Working with Lists
    Chapter 17: Collections
    Chapter 18: Stateful Objects
    Chapter 19: Type Parameterization
    Chapter 20: Abstract Members
    Chapter 21: Implicit Conversions and Parameters
    Chapter 22: Implementing Lists
    Chapter 23: For Expressions Revisited
    Chapter 24: The Scala Collections API
    Chapter 25: The Architecture of Scala Collections
    Chapter 26: Extractors
    Chapter 27: Annotations
    Chapter 28: Working with XML
    Chapter 29: Modular Programming Using Objects
    Chapter 30: Object Equality
    Chapter 31: Combining Scala and Java
    Chapter 32: Actors and Concurrency
    Chapter 33: Combinator Parsing
    Chapter 34: GUI Programming
    Chapter 35: The SCells Spreadsheet
    Appendix A: Scala Scripts on Unix and Windows
    Glossary
    Bibliography
    About the Authors
    Index
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    Chapter 10: Composition and Inheritance > 10.8 Using override modifiers - Pg. 192

    C HAPTER 10 · Composition and Inheritance Element «abstract» ArrayElement Array[String] LineElement Figure 10.2 · Class diagram for LineElement . With the new subclass, the inheritance hierarchy for layout elements now looks as shown in Figure 10.2. 10.8 Using override modifiers