1. abstract class Color2 { 2. //insert code here 3. } 4. 5. public class Blue2 extends Color2 { 6. public String getRGB() { return "blue"; } 7. } 和4个声明: public abstract String getRGB(); abstract String getRGB(); private abstract String getRGB(); protected abstract String getRGB(); 分别插入到第2行,有多少行可以编译?()
AnInterface is an interface. AnAdapter0 is a non-abstract, non-final class with a zero argument constructor. An Adapterl is a non-abstract, non-final class without a zero argument constructor, but with a constructor that takes one int argument. Which two construct an anonymous inner class()?
试述abstract class和interface有什么区别?
abstract class abstrctIt { abstract float getFloat (); } public class AbstractTest extends AbstractIt { private float f1= 1.0f; private float getFloat () {return f1;} } What is the result?()
1. abstract class AbstractIt { 2. abstract float getFloat(); 3. } 4. public class AbstractTest extends AbstractIt { 5. private float f1 = 1.0f; 6. private float getFloat() { return f1; } 7. } What is the result?()
According to F. de Saussure,()refers to the abstract linguistic system shared by all the members of a speech community.
abstract class A { abstract void al(); void a2() { } } class B extends A { void a1() { } void a2() { } } class C extends B { void c1() { } } and: A x = new B(); C y = new C(); A z = new C(); Which four are valid examples of polymorphic method calls?()
According to F. de Saussure, ()refers to the abstract linguistic system shared by all the mem- bers of a speech community.
Utterance is based on ();it is the realization of the abstract meaning of a sentence in a real situation of communication,or simply in a context.
AnInterface is an interface. AnAdapter0 is a non-abstract, non-final class with a zero argument constructor. AnAdapter1 is a non-abstract, non-final class without a zero argument constructor, but with a constructor that takes one int argument. Which two construct an anonymous inner class?()