10. public Object

A.public class MinMax<?> {

B.public class MinMax<? extends Number> {

C.public class MinMax<N extends Object> {

D.public class MinMax<N extends Number> {

E.public class MinMax<? extends Object> {

F.public class MinMax<N extends Integer> {

以下程序的输出结果是_____。

include＜iostream.h＞

class object

{ private:

int val;

public:

object( ) ;

object(int i) ;

～object( ) ;};

object: :object( )

{ val＝0;

cout ＜ ＜ "Default constructor for object" ＜ ＜ endl;}

object: :object(int i)

{ val＝i;

cout ＜ ＜ "Constructor for object" ＜ ＜ val ＜ ＜ endl;}

object: :～object( )

{ cout ＜ ＜ "Destructor for object" ＜ ＜ val ＜ ＜ endl;}

class container{ private:

object one;

object two;

int data;

public:

container( ) ;

container(int i,int j,int k) ;

～container( ) ;};

container: :container( )

{ data＝0;

cout ＜ ＜ "Default constructor for container" ＜ ＜ endl;}

container: :container(int i,int j,int k) :two(i) ,one(j)

{ data＝k;

cout ＜ ＜ "Constructor for container" ＜ ＜ endl;}

container: :～container( )

{ cout ＜ ＜ "Destructor for container" ＜ ＜ endl;}

void main( )

{ container anObj(5,6,10) ;}

阅读下列函数说明和Java代码，将应填入(n)处的字句写在对应栏内。

【说明】

类Queue表示队列，类中的方法如下表所示。

类Node表示队列中的元素；类EmptyQueueException给出了队列操作中的异常处理操作。

public class TestMain { //主类

public static viod main (String args[]){

Queue q=new Queue();

q.enqueue("first!");

q.enqueue("second!");

q.enqueue("third!");

(1) {

while(true)

System.out.println(q.dequeue());

}

catch( (2) ){ }

}

public class Queue { //队列

Node m_FirstNode;

public Queue(){m_FirstNode=null;}

public boolean isEmpty(){

if(m_FirstNode==null)return true;

else return false;

}

public viod enqueue(Object newNode) { //入队操作

Node next=m_FirstNode;

if(next==null)m_FirstNode=new Node(newNode);

else{

while(next.getNext()!=null)next=next.getNext();

next.setNext(new node(newNode));

}

}

public Object dequeue() (3) { //出队操作

Object node;

if (isEempty())

(4); //队列为空, 抛出异常

else{

node=m_FirstNode.getObject();

m_FirstNode=m_FirstNode.getNext();

return node;

}

}

}

public class Node{ //队列中的元素

Object m_Data;

Node m_Next;

public Node(Object data) {m_Data=data; m_Next=null;}

public Node(Object data, Node next) {m_Data=data; m_Next=-next;}

public void setObject(Object data) {m_Data=data;}

public Object getObject(Object data) {return m_data;}

public void setNext(Node next) {m_Next=next;}

public Node getNext() {return m_Next;}

}

public class EmptyQueueException extends (5) { //异常处理类

public EmptyQueueException() {

System.out.println("队列已空! ");

}

}

A.public int compareTo(Object o){/*more code here*/}

B.public int compareTo(Score other){/*more code here*/}

C.public int compare(Score s1,Score s2){/*more code here*/}

D.public int compare(Object o1,Object o2){/*more code here*/}

把一个对象写到一个流中相对比较简单，具体是通过调用ObjectOutputStream类的writeObject()方法实现的，那么该方法的定义为( )。

A．public final int writeObject(Object obj) throws IOException

B．public final void writeObject(Object obj) throws IOException

C．public Object writeObject(Object obj) throws IOException

D．public final Object writeObject(Object obj) throws IOException

1.public class GC{2.private Objec to；3.private void doSomethingElse（Object obj）{o=obj；}4.public void doSomething（）{5.Object o=new Object（）；6.doSomethingElse（o）；7.o=new Object（）；8.doSomethingElse（null）；9.o=null；10.}11.}When the doSomething method is called，after which line does the Object created in line 5 become available for garbage collection？（）

A.Line5

B.Line6

C.Line7

D.Line8

E.Line9

F.Line10