Practice Example Program (6.7) - Chapter 6: Primitive Values, Wrapper Classes, Types and Casting

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6 sample questions

Question 1.
What are the eight primitive data types in Java?
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Think about the basic data types discussed earlier.
Question 2.
What is autoboxing?
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Recall how integers are automatically converted.
3Question 3.
What is the purpose of wrapper classes in Java?
- To create custom data types
- To treat primitives as objects
- To improve performance
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Think about where you can use primitives.
4Question 4.
True or False: Autoboxing is the process of converting an Integer to an int.
- True
- False
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Consider which direction each conversion goes.
Question 5.
Create a program that takes user input for a decimal number, parses it to an integer, and demonstrates both autoboxing and unboxing.
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Remember to import the Scanner class and handle output appropriately.
Question 6.
Write a Java method that checks if a string can be parsed as an integer and return the corresponding integer value or throw an exception.
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Think about exception handling and how to use try-catch blocks.

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