假设C是抽象类,I1和I2是接口。下列关于抽象类或接口的定义,哪一个是正确的?
A: public class A extends C implements I1,I2{}
B: public class A extendsI1,I2 implements C{}
C: public class AimplementI1,I2extends C{}
D: public class A extends C,I1,I2{}
A: public class A extends C implements I1,I2{}
B: public class A extendsI1,I2 implements C{}
C: public class AimplementI1,I2extends C{}
D: public class A extends C,I1,I2{}
举一反三
- (1+X)假设 C 是抽象类,I1 和 I2 是接口。下列关于抽象类或接口的定义,哪一个是正确的( )。 A: public class A extends C implements I1,I2{} B: public class A extends I1,I2 implements C{} C: public class A implements I1,I2 extends C {} D: public class A extends C, I1, I2 {}
- 假设C和D是接口,下列定义哪个是正确的() A: public class A implements C,D{ } B: public class A implements C implements D{ } C: public class A extends C,D{ } D: public class A extends C extends D{ }
- 下列程序的执行结果是______。 class A1 implements Runnable { public void run() { for(iht i = 0; i < 10; i++) { System.out.println("i =" + i); if(i == 3) break; } } } public class ex38 { public static void main(String[] args) { Thread th1 = new Thread(new A1()); th1.start (); } } A: i=1 i=2 i=3 i=4 B: i=1 i=1 i=1 i=1 C: i=0 i=1 i=2 i=3 D: i=1 i=2 i=3
- 给定代码如下: public abstract interface Frobnicate { public void twiddle(String s); } 以下哪个类是正确的?(). A: public abstract class Frob implements Frobnicate { public abstract void twiddle(String s) { } } B: public abstract class Frob implements Frobnicate { } C: public class Frob extends Frobnicate { public void twiddle(Integer i) { } } D: public class Frob implements Frobnicate { public void twiddle(Integer i) { } }
- 对于下列代码,下列哪个叙述是正确的? class A { public int i=0; A(int m) { i = 1; } } public class B extends A { B(int m) { i = 2; } public static void main(String args[]){ B b = new B(100); System.out.println(b.i); //【代码】 } }