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class Wrenc的答案

class Wrench { 
public static void main(String [] args) { 
Wrench w = new Wrench(); Wrench w2 = new Wrench(); 
w2 = go(w,w2); 
System.out.print(w2 == w); 
} 
static Wrench go(Wrench wr1, Wrench wr2) { 
Wrench wr3 = wr1; wr1 = wr2; wr2 = wr3; 
return wr3;
} 
} 
结果是什么?() 

单选题
2022-07-14 10:29
A、true
B、false
C、编译失败
D、输出不可预期
查看答案

正确答案
A

试题解析

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Given that Thing is a class, how many objects and reference variables are created by the following code?()  
Thing item, stuff;  
item = new Thing();  
Thing entity = new Thing();

现有: 
interface Data {public void load();} 
abstract class Info {public abstract void load();}     
下列类定义中正确使用Data和Info的是哪项?() 

int [] my_Array;   
my_Array = new int[5]; 
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以上Java代码运行的结果是()。 

在Java语言中,如果你有下面的类定义: 
Abstract class Shape{ Abstract void draw(); } 
class Square extendeds Shape{}
如果你试图编译上面的代码会发生()。 

在Java语言中,如果你有下面的类定义:  
abstract class Shape { 
abstract void draw();    }   
Class Square extends Shape {} 
如果你试图编译上面的代码会发生()。 

路由器的部分配置如下: 
Class-map match-any GOLD 
match ip precedence ef 
class-map match-any SILVER 
Match ip dscp af31 
Policy-map Branch 
Class GOLD 
Priority percent 20 
Class SILVER 
bandwidth percent 15 
random-detect dscp-based 
interface Serial0/1 
description PPP link to BRANCH bandwidth 1536 
ip address 10.200.40.1 255.255.255.252 
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路由器配置VOICE数据流到优先级队列中,但发现并没有起到作用,可能什么原因?()

class java { 
public static void main(String [] java) {  
for (int Java = 1; Java 〈 java.length; Java++)  
System.out.print("java ");  
}  
}  
和命令行: 
java java java java java  
结果为:()  

You are designing a top-level OU structure to meet the business and technical requirements. 
Which top-evel OU or OUs should you use? ()

class Wrench { 
public static void main(String [] args) { 
Wrench w = new Wrench(); Wrench w2 = new Wrench(); 
w2 = go(w,w2); 
System.out.print(w2 == w); 
} 
static Wrench go(Wrench wr1, Wrench wr2) { 
Wrench wr3 = wr1; wr1 = wr2; wr2 = wr3; 
return wr3;
} 
} 
结果是什么?() 

现有: 
class Tree { 
private static String tree = "tree "; 
String getTree ()  {  return tree;  }      
} 
class Elm extends Tree { 
private static String tree = "elm "; 
public static void main (String  []  args)  {      
new Elm() .go (new Tree())  ;     
}
} 
void go (Tree t)  { 
String  s =  t.getTree () +Elm.tree  +  tree  +   (new  Elm() .getTree ()) ;     
System.out.println (s) ;}    
结果为:() 
               

import java.io.*; 
public class Forest implements Serializable { 
private Tree tree = new Tree(); 
public static void main(String [] args) { 
Forest f= new Forest(); 
try { 
FileOutputStream fs = new FileOutputStream(”Forest.ser”); 
ObjectOutputStream os = new ObjectOutputStream(fs); 
os.writeObject(f); os.close(); 
} catch (Exception ex) { ex.printStackTrace(); } 
} 
} 
class Tree { } 
What is the result?() 

public class TestOne { 
public static void main (String[] args) throws Exception { 
Thread.sleep(3000); 
System.out.println(”sleep”); 
} 
} 
What is the result?() 

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给出下列java源代码: 
//Point x 
Public class Interesting{} 
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阅读以下代码: 
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1. class Pizza { 
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3. public final void addTopping(String topping) { 
4. toppings.add(topping);
5. } 
6. } 
7. public class PepperoniPizza extends Pizza { 
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现有: 
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import java.io.IOException;  
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) catch (Exception e) (  
system.out.printIn(“Caught Exception”);  
)  
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public void methodA () {  
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4. public static void main(String args[]) { 
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6. throw new Exc1(); 
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现有:  
class ThreadExcept implements Runnable {  
public void run() { throw new RuntimeException("exception "); } 
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try {  
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System.out.print("main ");   
} catch (Exception e) { }     
}  
}  
和命令行: 
java ThreadExcept 1000   
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现有: 
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public void run()  {  throw new RuntimeException("exception ");  } 
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int x=Integer.parselnt (args [0]); 
Thread. sleep (x); 
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} 
} 
和命令行:  java ThreadExcept l000    
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Class TestException 
1. public class TestException extends Exception { 
2. } Class a: 
1. public class a { 
2. 
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4. 
5. if(name == null) { 
6. throw new TestException(); 
7. } 
8. 
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11. 
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在J2EE中,有如下代码在Servlet1.Java中   
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Public class Servlet1 extends HttpServlet{ 
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Which statements concerning the relationships between the following classes are true?()  
class Foo {  int num;  
Baz comp = new Baz();  
}  
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}  
class Baz extends Foo {  
Bar thing = new Bar();  
double limit;  
}  

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