1、当需要serialVersionUID时，Eclipse提供提示功能.
2、quick fix 及fix提供了多个修复方式，前两个为：
add default serial version ID
add generated serial version ID
add default serial version ID：
Adds a default serial version ID to the selected type
Use this option to add a user-defined ID in combination with custom serialization code if the type did undergo structural change since its first release.
add generated serial version ID：
Adds a generated serial version ID to the selected type
Use this option to add a compiler-generated ID if the type didnot undergo structural change since its first release.
3、如果你不喜欢此项功能,可以把它关掉,
windows -> preferences -> compiler -> Error/Warnings-> Potential Programming problems
将Serializable class without serialVersionUID的warning改成ignore.
4、不显式声明serialVersionUID，就会由jvm帮你在序列化时生成一个，很费资源。
所以sun推荐都显式声明serialVersionUID，且为private final static long 修饰
5、在《Efficetive Java》中后几章对serialVersionUID有详细介绍。
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