类的成员--代码块

public class BlockTest {
    public static void main(String[] args) {
        
        String desc = Person.desc;
        System.out.println(desc);
        
        Person p1 = new Person();
        Person p2 = new Person();
        System.out.println(p1.age);
        
        Person.info();
    }
}


class Person{
    //属性
    String name;
    
    int age;

    static String desc = "我是一个人";
    
    //构造器
    public Person(){
        
    }
    public Person(String name,int age){
        this.name = name;
        this.age = age;
    }
    
    //非static的代码块
    {
        System.out.println("hello, block - 2");
    }
    {
        System.out.println("hello, block - 1");
        //调用非静态结构
        age = 1;
        eat();
        //调用静态结构
        desc = "我是一个爱学习的人1";
        info();
    }
    //static的代码块
    static{
        System.out.println("hello,static block-2");
    }
    static{
        System.out.println("hello,static block-1");
        //调用静态结构
        desc = "我是一个爱学习的人";
        info();
        //不可以调用非静态结构
//        eat();
//        name = "Tom";
    }
    
    //方法
    public void eat(){
        System.out.println("吃饭");
    }
    @Override
    public String toString() {
        return "Person [name=" + name + ", age=" + age + "]";
    }
    public static void info(){
        System.out.println("我是一个快乐的人！");
    }
    
}