编译如下的Java程序片段: Class test{ Int count=9; Public void a(){ Int count=10; System.out,println(“count 1=” + count); } Public void count(){ System.out.println(“count 2 =”+ count); } Public static void main(String args[] ){ Test t=new Test(); t.a(); t.count(); } } 结果是()A、不能通过编译B、输出:count 1 =10 count 2=9C、输出:count 1=9 count 2=9
编译如下的Java程序片段: Class test{ Int count=9; Public void a(){ Int count=10; System.out,println(“count 1=” + count); } Public void count(){ System.out.println(“count 2 =”+ count); } Public static void main(String args[] ){ Test t=new Test(); t.a(); t.count(); } } 结果是()
- A、不能通过编译
- B、输出:count 1 =10 count 2=9
- C、输出:count 1=9 count 2=9
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编译如下的Java程序片段:Classtest{Intcount=9;Publicvoida(){Intcount=10;System.out,println(count1=”+count);}Publicvoidcount(){System.out.println(count2=”+count);}Publicstaticvoidmain(Stringargs[]){Testt=newTest();t.a();t.count();}}结果是()A.不能通过编译B.输出:count1=10count2=9C.输出:count1=9count2=9
如下程序的输出结果是______。 include using namespace std; class pumpkin{ publ 如下程序的输出结果是______。include<iostream>using namespace std;class pumpkin{public:pumpkin( ){++count;}~pumpkin( ){--eount;}static void total_count( ){cout<<count<<"pumpkin(s)"<<endl;}private:static int count;};int pumpkin::count=0;int main( ){pumpkin pl[10];pumpkin::total_count( );return 0;}
下面程序的运行结果是【】。 inChlde using namespace std; class count { static int n; 下面程序的运行结果是【 】。inChlde<iOStream>using namespace std;class count{static int n;public:count(){n++;}static int test(){for(int i=0:i<4;i++)n++;return n;}};int count::n=0;int main(){cout<<COUnt::test()<<" ";count c1, c2;cout<<count::test()<<end1;return 0;}
下列程序段的输出结果是【 】。public class Test {void printValue(int m) {do {System.out.println("The value is"+m);}while (--m>10);}public static void main (String args[]) {int i=10;Test t= new Test();t.printValue(i);}}
如下程序的输出结果是( )。 public class Test { void printValue(int m) { do { System.out.println("The value is"+m); } while( --m>10) } public static void main(String args[]) { int i=10; Test t=new Test(); t.printValue(i); } }A.The value is 8B.The value is 9C.The value is 10D.The value is 11
下面程序的正确输出是( )。 public class Hello { public static void main(String args[]) { int count, xPos=25; for ( count=1; count<=10; count++ ) { if ( count==5 ) break; System.out.println(count ); xPos += 10; } } }A.1 2 3 4B.1 3 4C.编译错误D.以上都不是
( 35 )有如下程序:#include iostreamusing namespace std;Class B{public:B(int xx):x(xx) {++cout; x+=10;}virtual void show() const{coutcount ' _ ' xendl;}protected:static int count;private:int x;};class D:public B{public:D(int xx,int yy):B(xx),y(yy) {++count; y+=100;}virtual void show() const{coutcount ' _ ' yendl;}private:int y;};int B::count=0;int main(){B *ptr=new D(10,20);ptr-show();delete ptr;return 0;}运行时的输出结果是A ) 1_120B ) 2_120C ) 1_20D ) 2_20
有如下程序: include using namespace std; class MyClass { public: 有如下程序: #include <iostream> using namespace std; class MyClass { public: MyClass() { ++count; } ~MyClass() { --count; } static int getCount() { return count; } private: static int count; }; int MyClass::count=0; int main() { MyClass obj; cout<<obj.getCount(); MyClass *ptr=new MyClass; cout<<MyClass::getCount(); delete ptr; cout<<MyClass::getCount(); return 0; }程序的输出结果是A.121B.232C.221D.122
有如下程序: #include using name space std; classB{ public: B(int xx):x(xx){++count;x+=10;} virtual void show()const {cout<<count'_'<<x<<endl;} protected: static int count; private: intx; }; class D:publicB{ public: D(int xx,int yy):B(xx),y(yy){++count;y+=100;} virtual void show()const {cout<<count<<'_'<<y<endl}; pnvate: inty; }; int B::count=0; intmain(){ B*ptr=new D(10,20); ptr-show(); delete ptr; return 0; } 运行时的输出结果是( )。A.1_120B.2_120C.1_20D.2_20
下面程序的运行结果是【】。 include using namespace std; class count{ static int n; 下面程序的运行结果是【 】。include <iostream>using namespace std;class count{static int n;public:count(){n++;}static int test(){for(int i=0;i<4;i++)n++;return n;}};int count::n = O;int main(){cout<<count:: test()<<" ";count c1, c2;cout<<count:: test()<<endl;return 0;}
下列程序的执行结果是 ( ) public class Test { public int aMethod() { satic int i=0; i++; System.out.println(i); } public static void.main(String args[]) { Test test=new Test(); test.aMethod(); }A.编译错误B.0C.1D.运行成功,但不输出
如下两个源程序文件,分别编译后,运行Example.class文件,运行结果为______。AB.java文件代码如下;package test;public class AB{int a=60;public void show(){System.out.println(”a=”+a);}Example.java文件代码如下:import test.AB;class Example{public static void main(String args[]){AB bj=new AB();obj.show();}}
下列代码的执行结果是public class Test{ public int aMethod(){ static int i=0; i++; System.out.println(i); } public static void main(String args[]){ Test test= new Test(); test. aMethod(); }}A.编译错误B.0C.1D.运行成功,但不输出
有如下程序: include using namespace std; class pumpkin{ public:pumpkin(){++count 有如下程序:include<iostream>using namespace std;class pumpkin{public:pumpkin(){++count;}~pumpkin(){--count;}static void total_count(){cout<<count<<"pumpkin(s)"<<end1;}private:static int count;};int pumpkin::count=0;int main(){pumpkin p1[10];pumpkin::total_count();return 0;}这个程序的输出结果是______。
有如下程序:includeusing namespace std;elass MyClass{public:MyClass( ){++count; 有如下程序: #include<lostreanl> using namespace std; elass MyClass{ public: MyClass( ){++count;} ~MyClass( ){--count;} static int getCount( ){return count;} private: static int count; }; int MyClass::count=0; int main( ){ MyClass obj; cout<<obj.getCount( ); MyClass*ptr=new MyClass; cout<<MyClass::getCount( ); delete ptr; cout<<MyCiass::getCount( ); return 0; } 程序的输出结果是A.121B.232C.221D.122
有以下程序:include using namespace std;class count{ static int n;public: count 有以下程序: #include <iostream> using namespace std; class count { static int n; public: count ( ) { n++; } static int test() { for (int i = 0; i < 4; i++ ) n++; return n; } }; int count :: n = 0; int main() { cout<<count :: test()<<" "; count c1, c2; cout<<count :: test()<<end1; return 0; } 执行后的输出结果是( )。A.4 10B.1 2C.22D.24
有如下程序:includeusing namespace std;class MyClass{public:MyClass(){++count;}~ 有如下程序: #include<iostream> using namespace std; class MyClass{ public: MyClass(){++count;} ~MyClass(){--count;} static int getCount(){return count;} private: static int count; }; int MyClass::count=0; int main(){ MyClA.121B.232C.221D.122
有如下程序:includeusing namespace std;class Toy{public:Toy(char*_n){strcpy(name 有如下程序: #include<iostream> using namespace std; class Toy{ public: Toy(char*_n){strcpy(name,_n);count++;} ~Toy(){count--;} char*GetName( ){return name;} static int getCount( ){return count;} private: char name[10]; static int count; }; int Toy::count=0: int main( ){ Toy tl("Snoopy"),t2("Mickey"),t3("Barbie"); cout<<t1.getCount( )<<endl; return 0; } 程序的输出结果是A.1B.2C.3D.运行时出错
有如下程序: #inCludeiostream using namespaCe耐: Class MyClass{ publiC: MyClass{++Count;} ~MyClass{--Count;} statiC int getCount{retum Count;} private: statiC int Count; }; ‘ int MyClass::Count=0; int main { MyClass obj; Coutobj.getCount; MyClass+ptr=new MyClass: CoutMyClass::9etCount; ’delete ptr; CoutMyClass::9etCount; return 0; } 执行这个程序的输出结果是( )。A.121B.232C.221D.122
下列程序的输出结果是( )。 public class Test { void printValue(int m) { do{ System.out.println("The value is"+m) } while(--m10) } public static void main(String args[]) { int i=10; Test t=new Test: t.printValue(i); } }A. The value is 8B.The value is 9C.The value is 10D.The value is 11
下列程序的输出结果是______。 include using namespace std; class Test( public: Te 下列程序的输出结果是______。 #include<iostream> using namespace std; class Test( public: Test() {cnt++;} ~Test() {cnt--;} static int Count(){return cnt;} private: static int cnt; }; int Test::cnt=0; int main() { cout<<Test::Count()<<""; Test t1,t2; Test*pT3=new Test; Test*pT4=new Test; cout<<Test::Count()<<""; delete pT4; delete pT3; cout<<Test::Count()<<end1; return 0; }A.024B.042C.420D.240
以下程序调试结果为:public class Test {int m=5;public void some(int x) {m=x;}public static void main(String args []) {new Demo().some(7);}}class Demo extends Test {int m=8;public void some(int x) {super.some(x);System.out.println(m);}}A.5B.8C.7D.无任何输出E.编译错误
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
编译如下Java程序片断: class test{ int count = 9; public void a(){ int count=10; System.out.println("count 1 =" + count); } public void count(){ System.out.println("count 2 =" + count); } public static void main(String args[]){ test t=new test(); t.a(); t.count(); } } 结果将()。 A、不能通过编译B、输出: count 1 = 10 count 2 = 9C、输出:count 1 = 9 count 2 = 9
public class Test { public int aMethod() { static int i = 0; i++; return i; } public static void main (String args[]) { Test test = new Test(); test.aMethod(); int j = test.aMethod(); System.out.println(j); } } What is the result?() A、 0B、 1C、 2D、 Compilation fails.
public class NamedCounter { private final String name; private int count; public NamedCounter(String name) { this.name = name; } public String getName() { return name; } public void increment() { coount++; } public int getCount() { return count; } public void reset() { count = 0; } } Which three changes should be made to adapt this class to be used safely by multiple threads? ()A、 declare reset() using the synchronized keywordB、 declare getName() using the synchronized keywordC、 declare getCount() using the synchronized keywordD、 declare the constructor using the synchronized keywordE、 declare increment() using the synchronized keyword
单选题编译如下Java程序片断: class test{ int count = 9; public void a(){ int count=10; System.out.println("count 1 =" + count); } public void count(){ System.out.println("count 2 =" + count); } public static void main(String args[]){ test t=new test(); t.a(); t.count(); } } 结果将()。A不能通过编译B输出: count 1 = 10 count 2 = 9C输出:count 1 = 9 count 2 = 9