现有: 1. class Wrench f 2.public static void main(String [] args) { 3.Wrench w=new Wrench( ); Wrench w2=new Wrench( ); 4. w2=go (w, w2); 5.System.out.print (w2==w); 6. } 7.static Wrench go (Wrench wrl, Wrench wr2) { 8.Wrench wr3=wrl; wrl=wr2; wr2=wr3; 9. return wr3; 10. } 11. } 结果是什么?()A、falseB、trueC、编译失败D、运行的时候有异常抛出
现有: 1. class Wrench f 2.public static void main(String [] args) { 3.Wrench w=new Wrench( ); Wrench w2=new Wrench( ); 4. w2=go (w, w2); 5.System.out.print (w2==w); 6. } 7.static Wrench go (Wrench wrl, Wrench wr2) { 8.Wrench wr3=wrl; wrl=wr2; wr2=wr3; 9. return wr3; 10. } 11. } 结果是什么?()
- A、false
- B、true
- C、编译失败
- D、运行的时候有异常抛出
相关考题:
有如下程序: include using namespaee std; class ONE{ public: virtual void f 有如下程序:include <iostream>using namespaee std;class ONE{public:virtual void f( ){cout<<"1";}};class TWO:public ONE{public:TWO( )1 cout<<"2";}{;class THREE:public TWO{public:virtual void f( )}TWO::f( );cout<<"3";}};int main( ){ONE aa,*P;TWO bb;THREE cc;P=cc;p->f( );return 0;}程序的输出结果是______。
有如下程序: include using namespace std; class A { public: virtual void f(){cout 有如下程序:include<iostream>using namespace std;class A{public:virtual void f(){cout<<"1";}};class B:public A{public:B (){cout<<"2";}};class C:public B{public:virtual void f(){B::f();cout<<"3";}};int main(){A aa,*p;B bb;C cc;p=cc;p->f();return 0;}执行上面程序的输出是______。
现有如F包结构:com|一一X||一一Alpha.class||||一一yI|一一Beta.class||l--Gamma.class和类:classTest{Alphaa;Betab;Gammac;}哪三个必须加入到类Test中,以使其通过编译?() A.packagey;B.packagecom;C.importcom.x.y.*;D.importcom.x.*;
现有:classWrench2{intsize;publicstaticvoidmain(String[]args){Wrench2w=newWrench2();w.size=II;Wrench2w2=go(w,w.size);System.out.print(w2.size);}staticWrench2go(Wrench2wr.ints){S=12;returnwr;}}结果为() A.11B.12C.编译失败D.运行时异常被抛出
现有两个类A,B,以下描述中表示B继承自A的是 ( )A.class A extends BB.class B implements AC.class A implements BD.class B extends A
下面的代码中有什么错误吗?_______using System;class A{public virtual void F(){Console.WriteLine("A.F");}}abstract class B:A{public abstract override void F();
在下面程序中,编译出现错误的语句是 ______。 class B { public: B( ){f(); } virtual void f()=0; };A.class BB.public:C.B() {f();}D.virtual void f()=0;
现有如F包结构: com |一一X | |一一Alpha.class | | | |一一y I |一一Beta.class | |l-- Gamma.class 和类: class Test { Alpha a; Beta b; Gamma c; } 哪三个必须加入到类Test中,以使其通过编译?() A、 package y;B、 package com;C、 import com.x.y.*;D、 import com.x.*;
Given classes defined in two different files: 1. package util; 2. public class BitUtils { 3. private static void process(byte[] b) { } 4. } 1. package app; 2. public class SomeApp { 3. public static void main(String[] args) { 4. byte[] bytes = new byte[256]; 5. // insert code here 6. } 7. } What is required at line 5 in class SomeApp to use the process method of BitUtils?() A、 process(bytes);B、 BitUtils.process(bytes);C、 app.BitUtils.process(bytes);D、 util.BitUtils.process(bytes);E、 import util.BitUtils. *; process(bytes);F、 SomeApp cannot use the process method in BitUtils.
现有: class Wrench f 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 wrl, Wrench wr2) { Wrench wr3=wrl; wrl=wr2; wr2=wr3; return wr3; } 结果是什么?() A、 falseB、 trueC、编译失败D、运行的时候有异常抛出
Given classes defined in two different files: 1.package util; 2.public class BitUtils{ 3.private static void process(byte[]b){} 4.} 1.package app; 2.public class SomeApp{ 3.public static void main(String[]args){ 4.byte[]bytes=newbyte[256]; 5.//insert code here 6.} 7.} What is required at line 5 in class SomeApp to use the process method of BitUtils?()A、process(bytes);B、BitUtils.process(bytes);C、app.BitUtils.process(bytes);D、util.BitUtils.process(bytes);E、importutil.BitUtils.*;process(bytes);F、SomeApp cannot use the process method in BitUtils.
现有: 1 Interface F{} 2 class A implements F{} 3 class B extends A{} 4 class C extends B{ 5 public static void main(String[] args){ 6 B b=new B(); 7 //inSert C0de here 8 } 9 } 下列哪行代码插入到第7行,将抛出java.lang.ClassCaseException异常()A、 A a=b;B、 F f= (C)b;C、 F f= (A)b;D、 B bb= (B)(A)b;
1.public class test ( 2.public static void main (String args[]) { 3.int i = 0xFFFFFFF1; 4.int j = ~i; 5. 6.} 7.) What is the decimal value of j at line 5?() A、 0B、 1C、 14D、 –15E、 An error at line 3 causes compilation to fail.F、 An error at line 4 causes compilation to fail.
1. class super { 2. public float getNum() {return 3.0f;} 3. } 4. 5. public class Sub extends Super { 6. 7. } Which method, placed at line 6, will cause a compiler error?() A、 Public float getNum() {return 4.0f; }B、 Public void getNum () { }C、 Public void getNum (double d) { }D、 Public double getNum (float d) {retrun 4.0f; }
现有: class Wrench2 { int size; public static void main(String [] args) { Wrench2 w=new Wrench2(); w.size=II; Wrench2 w2=go(w, w.size); System. out .print (w2. size); } static Wrench2 go(Wrench2 wr. int s) { S=12; return wr; } } 结果为() A、 11B、 12C、编译失败D、运行时异常被抛出
1.public class Test { 2.public static void main (String args[]) { 3.class Foo { 4.public int i = 3; 5.} 6.Object o = (Object) new Foo(); 7.Foo foo = (Foo)o; 8.System.out.printIn(foo. i); 9. } 10.} What is the result?() A、 Compilation will fail.B、 Compilation will succeed and the program will print “3”C、 Compilation will succeed but the program will throw a ClassCastException at line 6.D、 Compilation will succeed but the program will throw a ClassCastException at line 7.
单选题1.public class test ( 2.public static void main (String args[]) { 3.int i = 0xFFFFFFF1; 4.int j = ~i; 5. 6.} 7.) What is the decimal value of j at line 5?()A 0B 1C 14D –15E An error at line 3 causes compilation to fail.F An error at line 4 causes compilation to fail.
单选题Given classes defined in two different files: 1.package util; 2.public class BitUtils{ 3.private static void process(byte[]b){} 4.} 1.package app; 2.public class SomeApp{ 3.public static void main(String[]args){ 4.byte[]bytes=newbyte[256]; 5.//insert code here 6.} 7.} What is required at line 5 in class SomeApp to use the process method of BitUtils?()Aprocess(bytes);BBitUtils.process(bytes);Capp.BitUtils.process(bytes);Dutil.BitUtils.process(bytes);Eimportutil.BitUtils.*;process(bytes);FSomeApp cannot use the process method in BitUtils.
单选题1. class super { 2. public float getNum() {return 3.0f;} 3. } 4. 5. public class Sub extends Super { 6. 7. } Which method, placed at line 6, will cause a compiler error?()A Public float getNum() {return 4.0f; }B Public void getNum () { }C Public void getNum (double d) { }D Public double getNum (float d) {retrun 4.0f; }
单选题1. class Super { 2. public float getNum() { return 3.0f; } 3. } 4. 5. public class Sub extends Super { 6. 7. } Which method, placed at line6, causes compilation to fail?()A public void getNum(){}B public void getNum(double d){}C public float getNum() { return 4.0f; }D public double getNum(float d) { return 4.0d; }
单选题现有: 1. interface Animal { 2. void eat(); 3. } 4. 5. // insert code here 6. 7. public class HouseCat extends Feline { 8. public void eat() { } 9. } 和五个声明: abstract class Feline implements Animal { } abstract class Feline implements Animal { void eat(); } abstract class Feline implements Animal { public void eat(); } abstract class Feline implements Animal { public void eat() { } } abstract class Feline implements Animal { abstract public void eat(); } 分别插入到第5行,有几个可以通过编译?()A0B1C2D3
单选题现有: class Wrench2 { int size; public static void main(String [] args) { Wrench2 w=new Wrench2(); w.size=II; Wrench2 w2=go(w, w.size); System. out .print (w2. size); } static Wrench2 go(Wrench2 wr. int s) { S=12; return wr; } } 结果为()A 11B 12C编译失败D运行时异常被抛出
单选题现有: class Wrench f 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 wrl, Wrench wr2) { Wrench wr3=wrl; wrl=wr2; wr2=wr3; return wr3; } 结果是什么?()A falseB trueC编译失败D运行的时候有异常抛出
单选题1. abstract class AbstractIt { 2. abstract float getFloat(); 3. } 4. public class AbstractTest extends AbstractIt { 5. private float f1 = 1.0f; 6. private float getFloat() { return f1; } 7. } What is the result?()A Compilation succeeds.B An exception is thrown.C Compilation fails because of an error at line 2.D Compilation fails because of an error at line 6.
单选题class Wrench2 { int size; public static void main(String [] args) { Wrench2 w = new Wrench2(); w.size = 9; Wrench2 w2 = go(w, w.size); System.out.print(w2.size); } static Wrench2 go(Wrench2 wr, int s) { s = 7; return wr; } } 结果为:()A7B9C编译失败D输出结果不可预料
单选题Given a class Repetition: 1. package utils; 2. 3. public class Repetition { 4. public static String twice(String s) { return s + s; } 5. } and given another class Demo: 1. // insert code here 2. 3. public class Demo { 4. public static void main(String[] args) { 5. System.out.println(twice(”pizza”)); 6. } 7. } Which code should be inserted at line 1 of Demo.java to compile and run Demo to print“pizzapizza”?()A import utils.*;B static import utils.*;C import utils.Repetition.*;D static import utils.Repetition. *;E import utils.Repetition.twice();F import static utils.Repetition.twice;G static import utils.Repetition.twice;
单选题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?()AtrueBfalseC编译失败D输出不可预期