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Java code:
package MainCon;
public interface Animal {
void voice();
}
class Dog implements Animal {
public void voice() {
System.out.println("W W!");
}
}
class cat implements Animal{
public void voice(){
System.out.println("M M!");
}
}
class pig implements Animal{
public void voice(){
System.out.println("GU LI");
}
}
class Store {
public static Animal get(String choice){
if(choice.equalsIgnoreCase("dog")){
return new Dog();
}else if(choice.equalsIgnoreCase("pig")){
return new Dog();
}else{
return new cat();
}
}
}
public class AnimalTest{
public static void main(String[]args){
Animal a1 = Store.get("dog");
a1.voice();
Animal a2 = Store.get("pig");
a2.voice();
}
}
AnimalTestÀ౨´í¡¢
The public type AnimalTest must be defined in its own file
-----------------------------
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select a.name as parename ,b.name as chliname,a.typeId as paretype,b.typeid as chlitype from prodkind a inner join prodkind b where a.typeId=b.parentId
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public class Student{
//×ֶε͍Òå
private String _number; //ѧºÅ
private String _name; //ÐÕÃû
private   ......