java期末考题库

interface A{  //1位置

    public static final int TEMP;  //2位置

    public abstract void info();  //3位置

} 

interface IDemo{

　　public static final String name;  // 1

　　void print();   //2

　　public void getInfo();   //3

　}

abstract class Person implements IDemo{   //4

　　public void print(){

　　}

}

interface Inlog{

___________________

}

interface IAa{

     void show();

}

public class B implements IAa{

   public void show(){

             System.out.println("复写接口方法");

   }

}

abstract class Person {

 public abstract void eat();

}

public class Main {

    public static void main(String[] a) {

         Person p = new Person() {

           public void eat() {

            System.out.println("eat something");

           }

          };

          p.eat();

    }

}

abstract class Shape{

  int x;

  int y;

  public abstract void draw();

}

class father {

 public int addvalue(int a, int b) {

  int s = a + b;

  return s;

 }

}

class child extends father {

}

public interface Top{

  void twiddle(String s);

}

interface A {

}

class C {

}

class B extends D implements A {

}

public class Test {

  public static void main(String[] args) {

    B b = new B();

    if (b instanceof A)

      System.out.println("b is an instance of A");

    if (b instanceof C)

      System.out.println("b is an instance of C");

  }

}

class D extends C {

}

interface I { void f(); }

abstract class C implements I {}

下面哪句可以正确编译