求解：怎么样才能正确输出？ 请大神们指教啊

Question

abstract class Animal{

   static String zl;

static String js;

abstract void shout();

}

 class Cat extends Animal{

Cat(String cat){

zl=cat;

}

void shout() {

String cc="喵喵";

js=cc;

System.out.println("种类"+zl+",叫声"+js);

}

}

 class Dog extends Animal{

Dog(String dog){

zl=dog;

}

void shout() {

String dd="汪汪";

js=dd;

System.out.println("种类"+zl+",叫声"+js);

}

 }

class we{

public static void main(String[] args) {

Cat t1=new Cat("猫");

t1.shout();

Dog t2=new Dog("狗");

t2.shout();

}

}