Java抽象动物类博士不编译 - 初学者

abstract class Animal {

  public abstract void sound();

  public abstract void movement();

}



public class Cat extends Animal{

public void sound(){
   System.out.println("Meows");
}

public void movement(){
System.out.println("Pounces");
}

public static void main(String args[]){

 Animal obj = new Cat();
obj.sound();
}

 Animal obj = new Cat();
obj.movement();
}




public class Dolphin extends Animal{

public void sound(){
System.out.println("Whistles");
}

public void movement(){
 System.out.println("Swims");
}

public static void main(String args[]){

 Animal obj = new Dolphin();
 obj.sound();
 }

 Animal obj = new Dolphin();
 obj.movement();
  }





public class Parrot extends Animal{

public void sound(){
System.out.println("Talks");
}

public void movement(){
System.out.println("Flies");
}

 public static void main(String args[]){

 Animal obj = new Parrot();
 obj.sound();
 }

Animal obj = new Parrot();
obj.movement();
  }
abstract class Animal {

  public abstract void