Why Java needs clone interface?# Java - 爪哇娇娃
g*g
1 楼
Folks, I am confused when one needs to implement clone interface
in java, can't java just copy memory like C++?
in java, can't java just copy memory like C++?
c*t
2 楼
You can't do copy memory on a DAG. The result would be a tree.
You can't copy undirected graph or direct graph w/ circular
structures.
【在 g*****g 的大作中提到】
: Folks, I am confused when one needs to implement clone interface
: in java, can't java just copy memory like C++?
You can't copy undirected graph or direct graph w/ circular
structures.
【在 g*****g 的大作中提到】
: Folks, I am confused when one needs to implement clone interface
: in java, can't java just copy memory like C++?
m*t
3 楼
IMHO, the actual reason is Java has to let the programmer decide
whether to make deep or shallow copy while cloning. In some cases,
a hybrid of deep and shallow copy is also possible.
Also, while it's not hard for Java to provide a generic clone utility,
it would have to be based on reflection (similar to how serialization
works), which could be faily expensive operations.
whether to make deep or shallow copy while cloning. In some cases,
a hybrid of deep and shallow copy is also possible.
Also, while it's not hard for Java to provide a generic clone utility,
it would have to be based on reflection (similar to how serialization
works), which could be faily expensive operations.
相关阅读
Spring 2.5 vs. EJB3.0ant dependency analyzerPlease list your software on your laptop for java application developmentHelp needed on Java mail security issueiPhone SDK 开发iPhone的应用是不是只能在苹果机器上才可以啊?这个合并以后，是不是现在学java已经没有前途了？说说比较好的JAVA桌面软件吧jar启动时的内存设置jboss hot deployment in eclipseextending generic class , but not mentioning its parameterized type?liveconnect (javascript to java) security questionoracle/sun dealHow to parse the bytes[]请教大牛：java可以做这件事情吗java(TM) 6 update 7/6/5/4/..可以删掉吗invoke a function dynamically in Java?Who have electronic version of Core Java 2, Volume I: Fundamentals (Latest Edition)做Java web development 一定要 struts + spring + hibernate 吗Regular Expression question: how to enumerate all matches?有没有懂java和ImageJ的牛人，有关plugin (转载)