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This chapter is from the book

This chapter is from the book

Java in 21 Days, Sams Teach Yourself (Covering Java 8), 7th EditionJava in 21 Days, Sams Teach Yourself (Covering Java 8), 7th Edition

Learn More Buy

This chapter is from the book

This chapter is from the book

Java in 21 Days, Sams Teach Yourself (Covering Java 8), 7th EditionJava in 21 Days, Sams Teach Yourself (Covering Java 8), 7th Edition

Learn More Buy

Quiz

Review today’s material by taking this three-question quiz.

Questions

  1. What operator do you use to call an object’s constructor and create a new object?

    1. +
    2. new
    3. instanceof

  2. What kind of methods apply to all objects of a class rather than an individual object?

    1. Universal methods
    2. Instance methods
    3. Class methods

  3. If you have a program with objects named obj1 and obj2, what happens when you use the statement obj2 = obj1?

    1. The instance variables in obj2 are given the same values as obj1.
    2. obj2 and obj1 are considered to be the same object.
    3. Neither A nor B.

Answers

  1. B. The new operator is followed by a call to the object’s constructor.
  2. C. Class methods can be called without creating an object of that class.
  3. B. The = operator does not copy values from one object to another. Instead, it makes both variables refer to the same object.

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