构造。static用法，引用类型

构造。static用法，引用类型

通用构造器。静态构造器。构造方法。

package OopF.Static;

public class Test {
    {
        System.out.println("这里是通用构造器");
    }
    static {
        System.out.println("这里是静态构造器");
    }
    public Test(){
        System.out.println("这里是构造方法");
    }
    public static void pen(){
        System.out.println("静态方法");
    }
    public static void main(String[] args) {
        pen();//在静态方法里可以直接调用静态的东西
        Test.pen();//一般使用类名去访问静态方法
        Test test = new Test();
    }
}

执行结果

static理解

package OopF.Static;

public class Person {
    String name;
    static String contry;
    String adress;
    public Person(String name,String contry,String adress){
        this.name=name;
        this.contry=contry;
        this.adress=adress;
    }
    public static void main(String[] args) {
        Person p1 = new Person("李大注","大清","八大胡同");
        Person p2 = new Person("李大注","大清","八大胡同");
        Person.contry="民国";
        System.out.println(p1.contry);
        System.out.println(p2.contry);//为什么不提示

    }
}

 执行结果

植物类（引用类型理解）

package Test.TestFight;

public class ZhiWu {
    String name;
    int hp;
    int attack;
    public ZhiWu(String name, int hp, int attack) {
        this.name = name;
        this.hp = hp;
        this.attack = attack;
    }
    public void fight(JangShi js) {
        System.out.println(this.name + "正在打" + js.name);
        js.hp = js.hp - this.attack;
        System.out.println(js.name + "血量还剩" + js.hp);
    }
}

 僵尸类

package Test.TestFight;

public class JangShi {
    String name;
    int hp;
    int attack;
    public JangShi(String name, int hp, int attack) {
        this.name = name;
        this.hp = hp;
        this.attack = attack;
    }
    public void eat(ZhiWu zw){
        System.out.println(this.name+"正在吃"+zw.name);
        zw.hp= zw.hp-this.attack;
        System.out.println(zw.name+"还剩"+zw.hp);
    }
}

环境类

package Test.TestFight;

public class Cilent {
    public static void main(String[] args) {
        ZhiWu zhiWu = new ZhiWu("豌豆",1000,5);
        JangShi js = new JangShi("铁通僵尸",800,20);
        zhiWu.fight(js);
        js.eat(zhiWu);
    }
}

执行结果