generic collections

[Paula Murphy]

I am unsure about generics and i have a few questions:

What are the rules regarding passing a generic collection as an argument to a method where the method parameter is
1. a non generic collection?
2. a generic collection?

What are the rules for passing a non generic collection as an argument to a method where the method parameter is a generic collection?

If you override a method, with a generic parameter, does the overriding method have to have a parameter with the same generic?

[Seetharaman Venkatasamy]

Welcome to JavaRanch

Paula Murphy wrote:
What are the rules regarding passing a generic collection as an argument to a method where the method parameter is
1. a non generic collection?
2. a generic collection?

you can pass. you will get *warning* if the parameter or argument is not a generic

Paula Murphy wrote:What are the rules for passing a non generic collection as an argument to a method where the method parameter is a generic collection?

you can pass[vice-versa is true also] . there is an only one rule is that *always use generic*

Paula Murphy wrote:If you override a method, with a generic parameter, does the overriding method have to have a parameter with the same generic?

say super class has a method which has generic parameter , but overriding method in subclass can have non-generic parameter[but it cant have different generic type] . but vice-versa is not true.

the thumb rule is that dont mix non-generic collection into generic collection

hth