Generics in Java: Bounded Type Parameters & Wildcards
Java SE 15
| Intermediate
- 15 videos | 1h 57m 2s
- Includes Assessment
- Earns a Badge
In Java, bounded type parameters and wildcards offer certain flexibility and disadvantages. Recognizing these will help you decide when and how to use these tools to your advantage when writing code. Use this course to get to grips with what's meant by unbounded and bounded type parameters, explore the use of wildcards in Java, and recognize the applications of unbounded, upper-bounded, and lower-bounded wildcards. As you advance, investigate what's meant by 'wildcard capture' and 'type erasure.' When you're finished, you'll be able to correctly identify scenarios for using bounded type parameters and wildcards and implement them correctly.
WHAT YOU WILL LEARN
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discover the key concepts covered in this course
recall the disadvantages of unbounded type parameters
constrain types using bounded type parameters
specify type parameters with interface bounds
use bounded type parameters with custom objects
use multiple bounds with type parameters
use upper-bounded wildcards
compare and contrast upper-bounded wildcards and bounded type parameters -
recall when and how you would use unbounded wildcards
use unbounded wildcards
use lower-bounded wildcards
recall how Java infers data types using wildcard capture
recall the structure of valid type parameter names
recall how the Java compiler uses type erasure with generic types
summarize the key concepts covered in this course
IN THIS COURSE
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2m 27s
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9m 17s
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3. Specifying Bounded Type Parameters8m 40s
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4. Defining Classes with Bounded Type Parameters9m 18s
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5. Using Bounded Types with Custom Objects10m 4s
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6. Using Multiple Bound Specification for Bounded Types8m 8s
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7. Constraining Types Using Upper-bounded Wildcards10m 20s
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8. Comparing Bounded Types and Upper-bounded Wildcards5m 38s
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9. Using Unconstrained Variables & Unbounded Wildcards11m 5s
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10. Using Unbounded Wildcards in Class Objects5m 10s
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11. Constraining Types Using Lower-bounded Wildcards10m 13s
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12. Recognizing Java's Use of Wildcard Capture9m 6sIn this video, you'll learn about type inference and wildcards. You'll learn that when you use wildcards, you often get errors that are hard to understand. Many of the errors encountered with wildcards include the word capture. You'll first learn what exactly wildcard capture means. Then, you'll see how to handle this kind of error by refactoring your code. FREE ACCESS
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13. Identifying Valid and Invalid Type Parameter Names8m 1sIn this video, you'll learn how to recall the structure of valid type parameter names. You'll learn that when specifying the names of your type parameters, you must follow the convention of single uppercase letters. This allows you to clearly identify type parameter names and separate them from variable names or class names. FREE ACCESS
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14. Recognizing Java Compiler's Use of Type Erasure7m 23s
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15. Course Summary2m 11s
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