A: Aclass
B: Bclass
C: Class Cast Exception
D: 语法错误
举一反三
- 以下程序运行的结果是class Aclass{ public void go( ){ System.out.println("Aclass"); } } public class Bclass extends Aclass{ public void go( ){ System.out.println("Bclass"); } public static void main(String args[]){ Aclass a=new Bclass(); a.go(); } } A: Aclass B: Bclass C: Class Cast Exception D: 语法错误
- 看下面一段程序: class Aclass{ void go(){ System.out.println("Aclass");} } public class Bclass extends Aclass{ void go{ System.out.println("Bclass"); } public static void main(String args[]){ Aclass a=new Aclass(); Aclass a1=new Bclass(); a.go(); a1.go(); } 以上程序运行结果是:(). A: Aclass <br/>Aclass B: Aclass <br/>Bclass C: Bclass <br/>Aclass D: Bclass <br/>Bclass
- 阅读以下程序，写出结果。class AClass{ void go(){ System.out.println("AClass 的go方法"); }}class BClass extends AClass{ void go(){ System.out.println("BClass 的go方法"); }}public class TestBClass{ public static void main(String[] args){ AClass a =new AClass(); BClass b=new BClass(); a.go(); b.go(); }}程序的输出结果为：
- 看下面一段程序： class Aclass{ void go() { System.out.println("Aclass"); }}public class Bclass extends Aclass{ void go() { System.out.println("Bclass"); } public static void main(String args[]){ Aclass a=new Aclass(); Aclass a1=new Bclass(); a.go(); a1.go(); }}以上程序运行结果是：（ ） A: AclassAclass B: BclassBclass C: AclassBclass D: BclassAclass
- 下列程序的输出结果为 （注意：必需和程序运行结果严格一致，包括大小写、空格和换行！）class Aclass { void go() { System.out.println("Aclass"); } } public class Bclass extends Aclass { void go() { System.out.println("Bclass"); } public static void main(String args[]){ Aclass a=new Aclass(); Aclass a1=new Bclass(); a.go(); a1.go(); } }
内容
- 0
现有两个类AClass、BClass，以下描述中表示BClass继承自AClass的是（ ）。 A: class AClass extends BClass B: class BClass implements AClass C: class AClass implements BClass D: class BClass extends AClass
- 1
已定义类Aclass：class Aclass {private int x = 1;protected int y = 2;public int z = 3;public int sumA（）{ return（x +y +z ）; }}再通过继承与扩展定义子类Bclass：class Bclass extends Aclass {private A: s += b; B: s += x; C: s += z; D: s += y;
- 2
中国大学MOOC: 下列代码中构造方法的返回类型是（）public class Village { Village () { System .out .println(“hiding in Village”) ; } public static void main( String args [ ]) { Village c =new Village ( ) ;}class Village { public static void main( String args [ ]) { Village c =new Village ( ) ; } Village () { System .out .println(“hiding in Village”) ; } }
- 3
以下程序的运行结果是______ abstract class class1{abstract void method1();}class class2 extends class1{public void method1(){ System.out.println("子类");}｝public class MainClass{public static void main(String args[]){class1 ac=new class2();ac.method1();}}
- 4
下列程序运行结果是 public class Demo { public static void main(String[] args) { Object obj=new Father(){ public void show(){ System.out.println("helloworld"); } }; obj.show(); } } class Father{ public void show(){ System.out.println("hello father"); } }