The alphabet of Java object-oriented exercises polymorphism

. Write 2 interfaces:interfacea and interfaceb; in interface interfacea there's a way. void

Printcapitalletter (); there is a method in interface interfaceb void printlowercaseletter () ; then

Write a class print Implementation interface Interfacea and interfaceb, require print Capitalletter () method

Implements the output uppercase English alphabet function, theprintlowercaseletter () method implements the output lowercase English

The function of the alphabet. Write a main class e, create the Print object in the main method of the primary class e , and assign

The value given to the interfacea variable a, Object a calls print Capitalletter method; Finally again in the main class E

The main method creates the Print object and assigns a value to the variable bof the interfaceb Object b call

Printlowercaseletter method.

Interfacea interface package alphabet; public interface Interfacea {void Printcapitalletter ();}

　　

Intfaceb interface package alphabet; public interface Interfaceb {void Printlowercaseletter ();}

　　

Print class package alphabet; public class Print implements Interfacea, Interfaceb {@Overridepublic void Printcapitalletter () { System.out.println ("A,b,c,d,e,f,g,h,i,g,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z");} @Overridepublic void Printlowercaseletter () {System.out.println ("a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x, Y,z ");}}

　　

Main class Epackage alphabet; public class E {public static void main (string[] args) {interfacea a=new Print (); A.printcapitalletter (); Interfaceb b=new Print (); B.printlowercaseletter ();}}

　　

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The alphabet of Java object-oriented exercises polymorphism