十一、形参和返回值【黑马JavaSE笔记】

public interface inter {
    public abstract void jump();
}

public class interOperator {
    public void useInter(inter i) { //inter i = new Cat()
        i.jump();
    }

    public inter getInter(){
        inter i  = new Cat();
        return i;
    }
}

public class Cat implements inter{
    @Override
    public void jump() {
        System.out.println("猫跳高");
    }
}

public class Demo {
    public static void main(String[] args) {
        interOperator io = new interOperator();
        inter i = new Cat();
        io.useInter(i);

        inter i2 = io.getInter();   //i2 = new Cat()
        i2.jump();
    }
}