Given that t1 is a reference to a live thread， which is true？（）A、The Thread.sleep（） method can take t1 as an argument.B、The Object.notify（） method can take t1 as an argument.C、The Thread.yield（） method can take t1 as an argument.D、The Thread.setPriority（） method can take t1 as an argument.E、The Object.notify（） method arbitrarily chooses which thread to notify.
Given that t1 is a reference to a live thread， which is true？（）
- A、The Thread.sleep（） method can take t1 as an argument.
- B、The Object.notify（） method can take t1 as an argument.
- C、The Thread.yield（） method can take t1 as an argument.
- D、The Thread.setPriority（） method can take t1 as an argument.
- E、The Object.notify（） method arbitrarily chooses which thread to notify.
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多选题Which two can directly cause a thread to stop executing？（）AExiting from a synchronized block.BCalling the wait method on an object.CCalling the notify method on an object.DCalling the notifyAll method on an object.ECalling the setPriority method on a thread object.
单选题It is desirable that a certain method within a certain class can only be accessed by classes that are defined within the same package as the class of the method. How can such restrictions be enforced？（）AMark the method with the keyword public.BMark the method with the keyword protected.CMark the method with the keyword private.DMark the method with the keyword package.EDo not mark the method with any accessibility modifiers.
填空题What is the name of the method that threads can use to pause their execution until signalled to continue by another thread？ （） Fill in the name of the method （do not include a parameter list）.
单选题What can cause a thread to become non-runnable？（）A Exiting from a synchronized block.B Calling the wait method on an object.C Calling the notify method on an object.D Calling the notifyAll method on an object.
多选题Which statements concerning the methods notify（） and notifyAll（） are true？AInstances of class Thread have a method called notify（）.BA call to the method notify（） will wake the thread that currently owns the monitor of the object.CThe method notify（） is synchronized.DThe method notifyAll（） is defined in class Thread.EWhen there is more than one thread waiting to obtain the monitor of an object， there is no way to be sure which thread will be notified by the notify（） method.
多选题Which two can be used to create a new Thread？（）AExtend java.lang.Thread and override the run method.BExtend java.lang.Runnable and override the start method.CImplement java.lang.thread and implement the run method.DImplement java.lang.Runnable and implement the run method.EImplement java.lang.Thread and implement the start method.
多选题Which two statements are true about the hashCode method？（）AThe hashCode method for a given class can be used to test for object equality and object inequality for that class.BThe hashCode method is used by the java.util.SortedSet collection class to order the elements within that set.CThe hashCode method for a given class can be used to test for object inequality， but NOT objecte quality， for that class.DThe only important characteristic of the values returned by a hashCode method is that the distribution of values must follow a Gaussian distribution.EThe hashCode method is used by the java.util.HashSet collection class to group the elements within that set into hash buckets for swift retrieval.
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