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Questions and Answers
Which statement about wrapper classes in Java is true?
Which statement about wrapper classes in Java is true?
- Wrapper classes cannot be used in collections.
- Wrapper classes provide additional functionality to primitive data types. (correct)
- Wrapper classes can only be used with primitive data types.
- Wrapper classes encapsulate object data types.
What is the purpose of the Integer.parseInt() method in Java?
What is the purpose of the Integer.parseInt() method in Java?
- To perform mathematical operations on integers
- To check if a given string is an integer
- To convert a string to an integer (correct)
- To convert an integer to a string
Why are wrapper classes important in Java programming?
Why are wrapper classes important in Java programming?
- To enable primitive data types to be used as objects (correct)
- To restrict the usage of primitive data types
- To make primitive data types immutable
- To decrease the memory usage of primitive data types
In what scenarios are wrapper classes frequently used in Java applications?
In what scenarios are wrapper classes frequently used in Java applications?
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