两者都是不同的编程语言。

一个由（以前称为Sun）Oracle和另一个由Microsoft拥有。



比较两种编程语言是一项非常复杂的任务，因为几乎所有构造都会有差异。

Both are different programming languages.
One is owned by (formerly Sun) Oracle and the other by Microsoft.

Comparing two programming languages is a very complex task as there will be differences in almost all constructs.

你如何定义差异？你会如何定义主要？如果你仔细考虑，你应该明白这个问题根本没有用。任何其他答案都不可能帮助你 - 出于所有实际目的，你需要学习两者。或者不是。

-SA

How would you define "difference"? How would you define "main"? If you think about it properly, you should understand that this question is not valid at all. And any other answer cannot possibly help you — for all practical purposes, you would need to learn both. Or not.

—SA

请参阅以下链接。

希望它对你有所帮助。

主要差异在C＃和Java之间 [ ^ ]

http://www.developerdrive.com/2012/06/5-differences-between-c-and-java-data-types/ [ ^ ]

http://www.25hoursaday.com/CsharpVsJava.html [ ^ ]

refer below links.
hope it will helpful for you.
Main Differences between C# and Java[^]
http://www.developerdrive.com/2012/06/5-differences-between-c-and-java-data-types/[^]
http://www.25hoursaday.com/CsharpVsJava.html[^]