构造函数，静态代码块，构造代码块与方法的执行顺序

public class Persondemo {
public static void main(String[] args)
{
Person p= new Person("zhangdan",20);
}
}

public class Person {
private String name;
private int age;
//构造函数
public Person(String name,int age)
{
this.name=name;
this.age=age;
System.out.println("3");
}
//构造代码块
{
System.out.println("2");
}
//静态代码块
static
{
System.out.println("1");
}
//方法
public static void asd()
{
System.out.println("4");
}
}