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【单选题】编译运行下面的程序,结果是()。 class Main{ public static void main(String args[]){ ClassB b=new ClassB(); } public Main(){ System.out.print("A"); } } class ClassB extends Main{ public ClassB(){ super(); System.out.print("B"); } }

A.产生编译错误

B.代码可以编译运行,并输出结果:AB

C.代码可以编译运行,但没有输出

D.代码可以编译运行,并输出结果:BA


参考答案和解析
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更多 “【单选题】编译运行下面的程序,结果是()。 class Main{ public static void main(String args[]){ ClassB b=new ClassB(); } public Main(){ System.out.print("A"); } } class ClassB extends Main{ public ClassB(){ super(); System.out.print("B"); } }A.产生编译错误B.代码可以编译运行,并输出结果:ABC.代码可以编译运行,但没有输出D.代码可以编译运行,并输出结果:BA” 相关考题
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考题 class Beverage {   Beverage() { System.out.print("beverage "); }   }   class Beer extends Beverage {   public static void main(String [] args) {   Beer b = new Beer(14);   }   public int Beer(int x) {   this();   System.out.print("beer1 ");   }   public Beer() { System.out.print("beer2 "); }  }   结果是什么?()  A、beer1 beverageB、beer2 beverageC、beverage beer1D、编译失败

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考题 单选题现有:      class TestA  {  public void start()  {  System.out.println("TestA");  }     }  public class TestB extends TestA  {  public void start()  {  System.out.println("TestB");  }     public static void main (string[]  args)  (     ((TestA)new TestB()).start();     )     }  运行结果是哪项?()A   TeStAB   TeStBC 编译失败D 运行时抛出异常

考题 单选题public class Base {  public static final String FOO = “foo”;  public static void main(String[] args) {  Base b = new Base();  Sub s = new Sub();  System.out.print(Base.FOO);  System.out.print(Sub.FOO);  System.out.print(b.FOO);  System.out.print(s.FOO);  System.out.print(((Base)s).FOO);  } }  class Sub extends Base {public static final String FOO=bar;}  What is the result?()A  foofoofoofoofooB  foobarfoobarbarC  foobarfoofoofooD  foobarfoobarfooE  barbarbarbarbarF  foofoofoobarbarG  foofoofoobarfoo

考题 单选题下列程序的运行结果是(  )。class Shape{ public Shape(){ System.out.print("Shape"); }}class Circle extends Shape{ public Circle(){ System.out.print("Circle"); }}public class Test{ public static void main(String[]args){ Shape d=new Circle(); }}A ShapeB CircleC ShapeCircleD 程序有错误