For the following code (Same as Method dispatch 1), assume that: Classes Person, Animal, Dog, and Cat are all defined. Dog and Cat are subclasses of Animal. Animal, Dog, and Cat all implement a sayHello method Person implements a greet method Look at line 10. The first time through the loop, what class does Java use for a, to choose which sayHello() method to run?简答题

题目图片

登录即可查看完整答案

我们收录了全球超50000道真实原题与详细解析,现在登录,立即获得答案。

类似问题

For the following code assume that: Classes Person, Animal, Dog, and Cat are all defined. Dog and Cat are subclasses of Animal. Animal, Dog, and Cat all implement a sayHello method Person implements methods greet(Dog x), greet(Cat x), and greet(Animal x) The first time through the loop, on lines 9 and 10 (where the value of a is Spot) Which overloaded greet method will be invoked? Which overridden sayHello method will be invoked

Question at position 19 Which of the following demonstrates polymorphism?Overloading methods with different parametersUsing the private keywordDeclaring all methods as staticExtending a class without adding any new methodsClear my selection

Question at position 7 In Java, what must be true for polymorphism to occur during runtime?Method overriding in subclassesClasses must not extend other classesMethod overloading in the parent classVariables declared as protectedClear my selection

Question at position 5 Which one of the following is a correct example of "polymorphism"?Combining two classes into oneUsing different method names for the same or similar actionUsing many classes without any methodsUsing the same method name for similar actions, sometimes even across different classesClear my selection

更多留学生实用工具

加入我们，立即解锁 海量真题 与 独家解析，让复习快人一步！