java¶à̬µÄÓ¦Óà - Java / Java SE
interface animal{
void sayHi();
String getName();
}
class dog implements animal{
public void sayHi(){
System.out.println("I am "+getName()+bark());
}
public String bark(){
return "wang-wang";
}
public String getName(){
return "Bob.";
}
}
class bulldog extends dog{
public String getName(){
return "Mike.";
}
public String bark(){
return "wow-wow";
}
}
public class test2{
public static void main(String args[]){
animal b=new bulldog();
dog d=(dog)b; //A
check(d);
dog dd=(bulldog)b; //B
check(dd);
}
public static void check(dog d){
System.out.println("I am "+d.getName());
}
public static void check(bulldog d){
System.out.println("I am "+d.getName());
}
}
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