网友您好, 请在下方输入框内输入要搜索的题目:
题目内容
(请给出正确答案)
public class ClassA{ public int getValue(){ int value=0; boolean setting=true; String title="Hello"; if(value||(setting && title=="Hello")){return 1;} if(value==1&title.equals("Hello")){return 2;} } } And: ClassA a=new ClassA(); a.getValue(); What is the result?()
- A、1
- B、2
- C、Compilation fails.
- D、The code runs with no output.
- E、An exception is thrown at runtime.
参考答案
更多 “ public class ClassA{ public int getValue(){ int value=0; boolean setting=true; String title="Hello"; if(value||(setting title=="Hello")){return 1;} if(value==1title.equals("Hello")){return 2;} } } And: ClassA a=new ClassA(); a.getValue(); What is the result?()A、1B、2C、Compilation fails.D、The code runs with no output.E、An exception is thrown at runtime.” 相关考题
考题
在如下源代码文件Test.java中, 哪个是正确的类定义?()
A.public class test { public int x = 0; public test(int x) { this.x = x; } }B.public class Test{ public int x=0; public Test(int x) { this.x = x; } }C.public class Test extends T1, T2 { public int x = 0; public Test (int x) { this.x = x; } }D.public class
考题
若有以下程序:includeusingnamespacestd;classA{private:int x; public:int x;void s
若有以下程序: #include<iostream> usingnamespacestd; classA { private: int x; public: int x; void setx(int i) { x=i; } int getx() { return x; } }; class B:public A { private: int m; public: int p; void setvalue (int a,int b,int C) { setx(A) ; z=b; m=c; } void display() { cout<<getx()<<","<<z<<","<<m<<end1; } }; int main() { B obj; obj.setvalue(2,3,4); obj.display(); return 0; } 程序运行以后的输出结果是A.产生语法错误B.2,3,4C.2,2,2D.4,3,2
考题
有如下程序:includeusing namespace std;classA{public:A(){cout
有如下程序: #include<iostream> using namespace std; classA { public: A(){cout<<"A";} }; class B{public:B(){cout<<"B";}}; class C:public A { B b; public: C(){cout<<"C";} }; int main(){C obj;return 0;} 执行后的输出结果是( )A.ABCB.BACC.ACBD.CBA
考题
请按下面注释的提示,将类B的构造函数定义补充完整。classA{int a;public:A(int aa=0) {a=aa;)};Class B:public A{int b;A c;public://用aa初始化基数A,用aa+1初始化类对象成员cB(int aa): (b=aa+2)};
考题
有以下程序:include using namespace std; class Base { public: Base() { K=0; } int
有以下程序:include<iostream>using namespace std;class Base{public:Base(){K=0;}int x;};class Derivedl:virtual public Base{public:Derivedl(){x=10;}};class Derived2:virtua1 public Base
考题
有以下程序:includeusing namespace std;classA{private: int x;public: A(int a) {x
有以下程序: #include<iostream> using namespace std; class A { private: int x; public: A(int a) { x=a; } friend class B; }; class B { public: void print(A a) { a.x--; cout<<a, x<<end1; } }; int main () { A a(10); B b; b.print (a) ; return 0; } 程序执行后的输出结果是( )。A.9B.10C.11D.12
考题
下面程序段的输出结果为 package test; public class ClassA { int x=20; static int y=6; public static void main(String args[]) { ClassB b=new ClassB(); b.go(10); System.out.println("x="+b.x); } } class ClassB { int x; void go(int y) { ClassA a=new ClassA(); x=a.y; } }A.x=10B.x=20C.x=6D.编译不通过
考题
下面这个程序的结果是includeclass A{private:int a;public:void seta( );int geta
下面这个程序的结果是 #include<iostream.h> class A { private: int a; public: void seta( );int geta( );}; void A::seta( ) { a = 1;} int A::geta( ) {return a;} classA.1B.2C.随机输出1或2D.程序有错
考题
在下列源代码文件Test.java中,正确定义类的代码是( )。A.pblic class test { public int x=0; public test(int x) { this. x=x;} }B.public class Test { public int x=0; public Test(int x) { this. x=x;} }C.public class Test extends T1,T2{ public int x = 0; public Test(int x){ this. x = x; } }D.protected class Test extends T2{ public int x = 0; public Test(int x) { this. x = x; } }
考题
下面程序段的输出结果为( )。 package test; public class ClassA { int x=20: static int y=6; public static void main(String args[]) { ClassB b=new ClassB; go(10); System.out.println("x="+b.x); } } class ClassB { int X; void go(int y) { ClassA a=new ClassA; x=a.Y ; } }A.x=10B.x=20C.x=6D.编译不通过
考题
下面程序的结果是()。includeclass A{int a;public:A():a(1){}void showa(){cout
下面程序的结果是( )。 #include<iostream.h> class A { int a; public: A():a(1){} void showa(){cout<<a;} }; Class B { int a; public: B():a(2){} void showa(){cout<<a;} ); class C:public A,public B { int a; puA.1B.2C.3D.程序有错误
考题
下面程序段的输出结果为 package test; public class A { int x=20; static int y=6; public static void main(String args[]) { Class B b=new Class B(); b.go(10); System.out.println(”x=”+b.x); } } class Class B { int x; void go(int y) { ClassA a=new ClassA(); x=a.y; } }A.x=10B.x=20C.x=6D.编译不通过
考题
在下列源代码文件Test.java中, ( )是正确的类定义。A.public class test{B.public class Test{ public int x=0;public int x=0; public test (intx) public Test (int x){ {this.x=x; this.x=x;} }} }C.public class Test extends T1,T2{D.protected class Test extends T2{ public int=0;public int x=0; public Test(int x){Public Test (int x){ this.x=x;this.x=x: }} }}
考题
有以下源程序: package test; public class ClassA { int x=20; static int y=6; public static void main(String args[]) { ClassB b=new ClassB(); b.go(10); System.out.println("x="+b.x); } } class ClassB { int x; void go(int y) { ClassA a=new ClassA(); x=a.y; } } 上述源程序文件的运行结果为( )。A.x=10B.x=20C.x=6D.编译不通过
考题
在下列源代码文件Test.java中,哪个选项是正确的类定义? ( )A.public class test { public int x=0; public test(int x) { this.x=x; } }B.public class Test { public int x=0; public Test(int x) { this.x=x; } }C.public class Test extends Ti,T2 { public int x=0; public Test(int x) { this.x=x; } }D.protected class Test extends T2 { public int x=0; public Test(int x) { this.x=x; } }
考题
10. public class ClassA { 11. public void count(int i) { 12. count(++i); 13. } 14. } And: 20. ClassA a = new ClassA(); 21. a.count(3); Which exception or error should be thrown by the virtual machine?() A、 StackOverflowErrorB、 NullPointerExceptionC、 NumberFormatExceptionD、 IllegalArgumentExceptionE、 ExceptionlnlnitializerError
考题
package geometry; public class Hypotenuse { public InnerTriangle it = new InnerTriangle(); class InnerTriangle { public int base; public int height; } } Which is true about the class of an object that can reference the variable base? ()A、 It can be any class.B、 No class has access to base.C、 The class must belong to the geometry package.D、 The class must be a subclass of the class Hypotenuse.
考题
What produces a compiler error?() A、 class A { public A(int x) {} }B、 class A {} class B extends A { B() {} }C、 class A { A() {} } class B { public B() {} }D、 class Z { public Z(int) {} } class A extends Z {}
考题
public class Parent { public int addValue( int a, int b) { int s; s = a+b; return s; } } class Child extends Parent { } Which methods can be added into class Child?() A、 int addValue( int a, int b ){// do something...}B、 public void addValue (){// do something...}C、 public int addValue( int a ){// do something...}D、 public int addValue( int a, int b )throws MyException {//do something...}
考题
public class Parent { int change() {…} } class Child extends Parent { } Which methods can be added into class Child?() A、 public int change(){}B、 int chang(int i){}C、 private int change(){}D、 abstract int chang(){}
考题
public abstract class Shape { private int x; private int y; public abstract void draw(); public void setAnchor(int x, int y) { this.x = x; this.y = y; } } Which two classes use the Shape class correctly?()A、 public class Circle implements Shape { private int radius; }B、 public abstract class Circle extends Shape { private int radius; }C、 public class Circle extends Shape { private int radius; public void draw(); }D、 public abstract class Circle implements Shape { private int radius; public void draw(); }E、 public class Circle extends Shape { private int radius;public void draw() {/* code here */} }F、 public abstract class Circle implements Shape { private int radius;public void draw() { / code here */ } }
考题
多选题public abstract class Shape { private int x; private int y; public abstract void draw(); public void setAnchor(int x, int y) { this.x = x; this.y = y; } } Which two classes use the Shape class correctly?()Apublic class Circle implements Shape { private int radius; }Bpublic abstract class Circle extends Shape { private int radius; }Cpublic class Circle extends Shape { private int radius; public void draw(); }Dpublic abstract class Circle implements Shape { private int radius; public void draw(); }Epublic class Circle extends Shape { private int radius;public void draw() {/* code here */} }Fpublic abstract class Circle implements Shape { private int radius;public void draw() { / code here */ } }
考题
单选题class ClassA { public int numberOfinstances; protected ClassA(int numberOfinstances) { this.numberOflnstances = numberOfinstances; } } public class ExtendedA extends ClassA { private ExtendedA(int numberOfinstances) { super(numberOflnstances); } public static void main(String[] args) { ExtendedA ext = new ExtendedA(420); System.out.print(ext.numberOflnstances); } } Which is true?()A
420 is the output.B
An exception is thrown at runtime.C
All constructors must be declared public.D
Constructors CANNOT use the private modifier.E
Constructors CANNOT use the protected modifier.
考题
单选题public class Parent{ public void change(int x){} } public class Child extends Parent{ //覆盖父类change方法 } 下列哪个声明是正确的覆盖了父类的change方法?()A
protected void change(int x){}B
public void change(int x, int y){}C
public void change(String s){}D
public void change(int x){}
考题
单选题10. public class ClassA { 11. public void count(int i) { 12. count(++i); 13. } 14. } And: 20. ClassA a = new ClassA(); 21. a.count(3); Which exception or error should be thrown by the virtual machine?()A
StackOverflowErrorB
NullPointerExceptionC
NumberFormatExceptionD
IllegalArgumentExceptionE
ExceptionlnlnitializerError
考题
单选题What produces a compiler error?()A
class A { public A(int x) {} }B
class A {} class B extends A { B() {} }C
class A { A() {} } class B { public B() {} }D
class Z { public Z(int) {} } class A extends Z {}
考题
单选题public class ClassA{ public int getValue(){ int value=0; boolean setting=true; String title="Hello"; if(value||(setting title=="Hello")){return 1;} if(value==1title.equals("Hello")){return 2;} } } And: ClassA a=new ClassA(); a.getValue(); What is the result?()A
1B
2C
Compilation fails.D
The code runs with no output.E
An exception is thrown at runtime.
热门标签
最新试卷