public class SomeException { } Class a: public class a { public void doSomething() { } } Class b: public class b extends a { public void doSomething() throws SomeException { } } Which is true about the two classes?()
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?()
现有: public class TestDemo{ private int X-2; static int y=3; public void method(){ final int i=100; int j =10; class Cinner { public void mymethod(){ //Here } } } } 在Here处可以访问的变量是哪些?()
给定如下Java程序片断: class A{ public A (){ System.out.println("A"); } } class B extends A{ public B(){ System.out.println("B"); } public static void main(String[] args){ B b=new B(); } } 上述程序将()。
1. public class A { 2. void A() { 3. System.out.println(“Class A”); 4. } 5. public static void main(String[] args) { 6. new A(); 7. } 8. } What is the result?()
现有: public class Pet() public class Cat extends Pet{) 执行代码 Cat c- new Cat(); Pet p= (Pet)c; 后下列哪项是正确的?()
现有: class WhileTests { public static void main (String [] args) { int X=5; while (++x<4) { --x; } System.out.println( "x="+x); } } 结果是什么?()
现有: class Test2 f public static void main (String [] args) { short a,b,C; a=l; b=2; C=a+b; a+=2: } 以上代码中,哪一句是错误的?()
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?()
现有: public class Pet() public class Cat extends Pet{) 执行代码 Cat c- new Cat(); Pet p= (Pet)c; 后下列哪项是正确的?()
现有 public class Parentt 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?()
现有2 个文件: 1. package x; 2. public class X { 3. public static void doX() { System.out.print("doX "); } 4. } 和: 1. class Find { 2. public static void main(String [] args) { 3. //insert code here 4. } 5. } 哪两行分别插入到类Find 的第3 行将编译并产生输出“doX”? ()
现有2个文件: package x; public class X{ public static void doX() {System.out.print("doX");} } 和: class Find{ public static void main(String [] args) { //insert code here } } 哪两行分别插入到类Find的第3行将编译并产生输出“doX”?()
下面程序运行的结果是public abstract class A{public A(){Console.WriteLine('A');}public virtual void Fun(){Console.WriteLine(A.Fun());}}public class B : A{public B(){Console.WriteLine('B');}public new void Fun(){Console.WriteLine(B.Fun());}}
已知:class A{public:int a;int b();int f();int f(int);int g();};class B{public:char f();int g();private:int a;int b();};class C:public A,public B{};设有:C *pc;则:
public class A{ public static void main(String args[]){ B b = new B(); b.test(); } public void test(){ System.out.print(\A\); } } class B extends A{ void test(){ super.test(); System.out.println(\B\); } }
下面程序输出的结果为()。 inClUde”iostream.h” Class A {public: A(){cout<<“CLASS A”<<endl;} ~A()<)}; class B:public A {public: B(){cout<<”CLASSB”<<endl;} ~B(){}}; void main() {A*p; p=new B; B *q; q=new B;}
若类A和类B的定义如下;class A{ int i,j;public: int geti() {return i; }};clasS B:public A{ i
对于类定义:class A{public:virtual void func1(){}void func2(){}};class B:public A{public:
下面程序段的输出结果为package test;public class Class A{ int x=20; static int y=6; public
若类A和类B的定义如下class A{int i,j;public:int geti(){return i;}};class B:public A{int k:public:void make(){k=i*j;}};则上述定义中非法的语句是
对于类定义 class A{public()
某 Java源文件代码如下: public class A { int a; } class B { int b; } class C { public static void main()
下面的程序能正确运行吗 public class NULL { public static void haha(); } }A.能