class DDD
{
private int a =3 ;
public DDD(DDD obj) //这里
{
a = obj.a;
}
public DDD()
{
a=5;
}
public static void main(String args[])
{
DDD ref1 = new DDD();
DDD ref2 = new DDD(ref1);
System.out.println(ref2.a);
}
}
大家赞同我的说法吗?
{
private int a =3 ;
public DDD(DDD obj) //这里
{
a = obj.a;
}
public DDD()
{
a=5;
}
public static void main(String args[])
{
DDD ref1 = new DDD();
DDD ref2 = new DDD(ref1);
System.out.println(ref2.a);
}
}
大家赞同我的说法吗?
public String(String original)
用一个String创造一个String
比如String str = new String("Hello");(很差的写法,平常不要用)