Exercises
3.5 (Keyword
new) What’s the purpose of keywordnew? Explain what happens when you use it.3.6 (Default Constructors) What is a default constructor? How are an object’s instance variables initialized if a class has only a default constructor?
3.7 (Instance Variables) Explain the purpose of an instance variable.
3.8 (Using Classes without Importing Them) Most classes need to be imported before they can be used in an app. Why is every app allowed to use classes
SystemandStringwithout first importing them?3.9 (Using a Class without Importing It) Explain how a program could use class
Scannerwithout importing it.3.10 (set and get Methods) Explain why a class might provide a set method and a get method for an instance variable. ...
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