程序代码如下,请问会有什么结果? 1. interface O{void mO();} 2. interface P{void mP ();} 3. interface Q extends O, P{void mQ();} 4. abstract class A implements Q{ 5. publicvoid mA(){} 6. publicvoid mO(){} 7. abstractvoid mB(); 8. } 9. class B extends A{ 10 void mP(){} 11 void mB(){} 12 }