函数wx.setTabBarBadge（Objectobject)的参数属性（)表示tabBar的哪一项（从左边算起)

以下哪些方法在Object类中定义（）。

A . toString（） B . equals（Objecto） C . public static void main（String[]args） D . System.out.println（） E . wait（）

As look-out，you spot an object 45°off your port bow. You should report the object as（）.

A . broad on the port bow B . 3 points on the port bow C . 3 points forward of the port beam D . on the port beam

Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object？（）

A . When using versions of Java technology earlier than 5.0. B . When sharing a StringBuffer among multiple threads. C . When using the java.io class StringBufferInputStream. D . When you plan to reuse the StringBuffer to build more than one string.

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void waitForSignal（） { Object obj = new Object（）； synchronized （Thread.currentThread（）） { obj.wait（）； obj.notify（）； } } Which is true？（）

A . This code may throw an InterruptedException. B . This code may throw an IllegalStateException. C . This code may throw a TimeoutException after ten minutes. D . This code will not compile unless “obj.wait（）” is replaced with “（（Thread） obj）.wait（）”. E . Reversing the order of obj.wait（） and obj.notify（） may cause this method to complete normally. F . A call to notify（） or notifyAll（） from another thread may cause this method to complete normally.

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Whichtwo scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object？（）

A . When using versions of Java technology earlier than 5.0. B . When sharing a StringBuffer among multiple threads. C . When using the java.io class StringBufferInputStream. D . When you plan to reuse the StringBuffer to build more than one string. E . Enitiation of separate design processes to the separation of user

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An object is（）

A . what classes are instantiated from. B . an instance of a class. C . a blueprint for creating concrete realization of abstractions. D . a reference to an attribute. E . a variable.

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What happens when thread X executes a wait（） method on object A， without owning object A’s lock？（）

A . Compilation fails. B . An exception is thrown. C . The wait（） method has no effect. D . Thread X receives the lock immediately. E . Object A moves the thread to the wait pool.

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关于object类，以下描述中正确的有（）

A . object类中定义了一些重要的成员函数和变量，以方便JAVA类的使用 B . object类是所有其他JAVA类的直接或间接父类 C . object类是一个非常特殊的“虚拟”类，也就是说，你只能丛object类中派生出其他类，但不能创建一个object类的对象。 D . 如果一个类已经有了父类，那么这个类同时继承了object类，也就是说，这时候这个类实际上有2个父类 E . 由于JAVA中的类是单继承的，因此所有的类以object类为根形成了一棵继承树

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以下函数中，不是Object类所有的是（）

A . notify B . valueOf C . toString D . wait

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Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object?（）

A . When using versions of Java technology earlier than 5.0. B . When sharing a StringBuffer among multiple threads. C . When using the java.io class StringBufferInputStream. D . When you plan to reuse the StringBuffer to build more than one string.

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10. public Object m（） { 11. Object o = new Float（3.14F）； 12. Object [] oa = new Object[1]； 13. oa[0] = o； 14. o = null； 15. return oa[0]； 16. } When is the Float object， created in line 11， eligible for garbage collection？（）

A . Just after line 13. B . Just after line 14. C . Never in this method. D . Just after line 15 （that is， as the method returns）.

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1. public class X （ 2. public object m （） { 3. object o = new float （3.14F）； 4. object [] oa = new object [1]； 5. oa[0]= o； 6. o = null； 7. return oa[0]； 8. } 9. } When is the float object created in line 3， eligible for garbage collection？（）

A . Just after line 5 B . Just after line 6 C . Just after line 7 （that is， as the method returns） D . Never in this method.

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Which setting change would you allow to make a child object to be moved out of a parent object?（）

A . Flex mode on. B . Flex mode off. C . Confined mode on. D . Confined mode off.

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public class X { public object m （） { object o = new float （3.14F）； object oa = new object [1]； oa[0]= o； o = null； return oa[0]； } } When is the float object created in line 3， eligible for garbage collection？（）

A . Just after line 5 B . Just after line 6 C . Just after line 7 （that is， as the method returns） D . Never in this method.

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Identify the verb, subject complement, direct object, indirect object and object complement in the following sentences. 1. George is the captain.

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“object”指的是主体的存在。（）

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监听加速度变化的监听频率是通过函数wx.startAccelerometer（Object object)的参数object的（a ）属性来设置的？

A．interval B．success C．fail D．complete

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Object是所有类的父类。( ) 答案解析：Object是所有类的父类。

A、正确 B、错误

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