Java 추상 클래스에 대한 자세한 소개

[访问修饰符]abstract<返回类型><方法名>([参数列表])

package demo.chongwu;

public abstract class Pet {
    private String name = "无名氏";
    private int health =100;
    private int love =0;
    //有参构造方法
    public  Pet (String name){
        this.name =name;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getHealth() {
        return health;
    }

    public void setHealth(int health) {
        this.health = health;
    }

    public int getLove() {
        return love;
    }

    public void setLove(int love) {
        this.love = love;
    }

    //抽象方法，输出宠物信息
    public abstract void print();

}

package demo.chongwu;

public class Dog  extends Pet{
    private String strain;

    public Dog(String name, String strain) {
        super(name);
        this.strain = strain;
    }

    public String getStrain() {
        return strain;
    }

    public void setStrain(String strain) {
        this.strain = strain;
    }

    @Override
    public void print() {
        System.out.println("我的名字是"+this.getName()+"我是一只"+this.strain+".");
    }
}

package demo.chongwu;

public class Test {
    public static void main(String[] args) {
        Pet pet =new Dog("布尔","拉布拉多");
        pet.print();
    }
}
输出结果：
我的名字是布尔我是一只拉布拉多.