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?()
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];
for(int count = 0; count <= 5; count++)
System.out.println(my_Array[count]);
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
encapsulation ppp
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?()
给出下列java源代码:
//Point x
Public class Interesting{}
在源代码//point x处添加()能符合java语法
阅读以下代码:
public class Test{
public static void main(){
System.out.println(“x=”+x); } }
请问,代码运行的结果是?()
1. class Pizza {
2. java.util.ArrayList toppings;
3. public final void addTopping(String topping) {
4. toppings.add(topping);
5. }
6. }
7. public class PepperoniPizza extends Pizza {
8. public void addTopping(String topping) {
9. System.out.println(”Cannot add Toppings”);
10. }
11. public static void main(String[] args) {
12. Pizza pizza = new PepperoniPizza();
13. pizza.addTopping(”Mushrooms”);
14. }
15. }
What is the result?()
public class X {
public static void main (String[]args) {
string s = new string (“Hello”);
modify(s);
System.out.printIn(s);
}
public static void modify (String s) {
s += “world!”;
}
}
What is the result?()
分析下列Java代码:
class A {
public static void main(String[] args) {
method(); }
static void method() { try {
System.out.println("Hello"); System.exit(0); }
finally {
System.out.println("good-bye"); } } }
编译运行后,输出结果是()。
Assuming that the serializeBanana2() and the deserializeBanana2() methods will correctly use Java serialization and given:
import java.io.*;
class Food {Food() { System.out.print(”1”); } }
class Fruit extends Food implements Serializable {
Fruit() { System.out.print(”2”); } }
public class Banana2 extends Fruit { int size = 42;
public static void main(String [] args) {
Banana2 b = new Banana2();
b.serializeBanana2(b); // assume correct serialization
b = b.deserializeBanana2(b); // assume correct
System.out.println(” restored “+ b.size + “ “); }
// more Banana2 methods
}
What is the result?()
在Java语言中,小明在他的包mypackage中定义了类My_Class, 在mypackage的子包mysubpackage中也有个类My_Class。小明用 import mypackage.*;引入包, 执行其中的语句: My_Class NewClass = new My_Class();时,将发生()。
import java.util.*;
public class PQ {
public static void main(String[] args) {
PriorityQueue
pq.add(”carrot”);
pq.add(”apple”);
pq.add(”banana”);
System.out.println(pq.poll() +”:” + pq.peek());
}
}
What is the result?()
1. public class SimpleCalc {
2. public int value;
3. public void calculate() { value += 7; }
4. }
And:
1. public class MultiCalc extends SimpleCalc {
2. public void calculate() { value -= 3; }
3. public void calculate(int multiplier) {
4. calculate();
5. super.calculate();
6. value *=multiplier;
7. }
8. public static void main(String[] args) {
9. MultiCalc calculator = new MultiCalc();
10. calculator.calculate(2);
11. System.out.println(”Value is: “+ calculator.value);
12. }
13. }
What is the result?()
What is wrong with the following code?()
class MyException extends Exception {}
public class Qb4ab {
public void foo() { try { bar(); } finally { baz();
} catch (MyException e) {}
}
public void bar() throws MyException {
throw new MyException();
}
public void baz() throws RuntimeException {
throw new RuntimeException();
}
}
现有:
class Birds {
public static void main (String [] args) {
try {
throw new Exception () ;
} catch (Exception e) {
try {
throw new Exception () ;
} catch (Exception e2) { System.out.print ("inner "); }
System. out.print ( "middle" ) ;
}
System.out.print ("outer") ;
}
}
结果是()
Given:
11. static class A {
12. void process() throws Exception { throw new Exception(); }
13. }
14. static class B extends A {
15. void process() { System.out.println("B "); }
16. }
17. public static void main(String[] args) {
18. A a = new B();
19. a.process();
20. }
What is the result? ()
11. static class A {
12. void process() throws Exception { throw new Exception(); }
13. }
14. static class B extends A {
15. void process() { System.out.println(”B”); }
16. }
17. public static void main(String[] args) {
18. new B().process();
19. }
What is the result?()
import java.io.IOException;
public class ExceptionTest(
public static void main (Stringargs)
try (
methodA();
) catch (IOException e) (
system.out.printIn(“Caught IOException”);
) catch (Exception e) (
system.out.printIn(“Caught Exception”);
)
)
public void methodA () {
throw new IOException ();
}
What is the result?()
1. class Exc0 extends Exception { }
2. class Exc1 extends Exc0 { }
3. public class Test {
4. public static void main(String args[]) {
5. try {
6. throw new Exc1();
7. } catch (Exc0 e0) {
8. System.out.println(“Ex0 caught”);
9. } catch (Exception e) {
10. System.out.println(“exception caught”);
11. }
12. }
13. }
What is the result?()
现有:
class ThreadExcept implements Runnable {
public void run() { throw new RuntimeException("exception "); }
public static void main(String [] args) {
new Thread(new ThreadExcept()).start();
try {
int x = Integer.parseInt(args[0]);
Thread.sleep(x);
System.out.print("main ");
} catch (Exception e) { }
}
}
和命令行:
java ThreadExcept 1000
哪一个是结果?()
现有:
class ThreadExcept implements Runnable {
public void run() { throw new RuntimeException("exception "); }
public static void main(Stri_ng [] args) {
new Thread (new ThreadExcept()).start();
try {
int x=Integer.parselnt (args [0]);
Thread. sleep (x);
System.out.print("main");
} catch (Exception e) { }
}
}
和命令行: java ThreadExcept l000
哪一个是结果?()
Class TestException
1. public class TestException extends Exception {
2. } Class a:
1. public class a {
2.
3. public String sayHello(String name) throws TestException {
4.
5. if(name == null) {
6. throw new TestException();
7. }
8.
9. return “Hello “+ name;
10. }
11.
12. }
A programmer wants to use this code in an application:
45. A a=new A();
46. System.out.println(a.sayHello(”John”));
Which two are true?()
在J2EE中,有如下代码在Servlet1.Java中
Import javax.servlet.*;
Import javax.servlet.http.*
Import java.io.IOException;
Import java.io.PrintWriter;
Public class Servlet1 extends HttpServlet{
Public void init () throw ServletException {}
Public void service(HttpServletRequest request,
HttpServletResponce response) throws ServletException,IOException{
PrintWriter out=response.getWriter();
Out.println(“hello!”); } }
假如编译Servlet要具备的环境都已经建立好。现在用完全正确的命令编译该文件,对于以下成熟正确的是()
Which statements concerning the relationships between the following classes are true?()
class Foo { int num;
Baz comp = new Baz();
}
class Bar { boolean flag;
}
class Baz extends Foo {
Bar thing = new Bar();
double limit;
}
免费的网站请分享给朋友吧