class Mydate
{
    char bir;
    Mydate(char bir)
    {
        this.bir=bir;
    }
    char get()
    {
        return bir;
    }
}
public class Person
{
 
    String name;
    Mydate birthday;
     Person(String name,Mydate birthday)
    {
        this.name=name;
        this.birthday=birthday;
    }
    public Person(Person p)
    {
        this(p.name,p.birthday);
    }
    public static void main(String args[])
    {
   
        Person p1=new Person("李小明",new Mydate("1979,3,15"));
        System.out.println(p1.name+p1.birthday);
        Person p2=new Person(p1);
        System.out.println(p2.name+p2.birthday);}
}
这咋不行啊！！请各位指点一下！！！

谢谢大家！！不好意思！！！又犯低级错误了！！呵呵呵呵