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class Animal{
private String name;
public void setName(String name){
this.name=name;
}
public String getName(){
return name;
}
}
class Dog extends Animal{

}
public class Demo {

    public Demo() {
    }
    public static void main (String[] args) {
    Dog d=new Dog();
    d.setName("dog");
    System.out.println (d.getName());
    }
   
}

d.setName("dog")  Ã÷ÏÔ¸³Öµ½øÈ¥ÁË
Èç¹û²»Äܼ̳Р ÄÇ"dog"ÍùÄĸé?
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