Combining a string with the value of a variable to be the name of another variable in EL

Question

I want to do something like this:

But it does not work throws exception: \"${summary${selChrm

Answer 1

You cannot nest EL expressions. You can however just concatenate them.

Or, if ${summary} is actually not an object in any of the scopes, do

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Update: OK, you actually need to access ${summary01}. If you know the scope beforehand, then you can access it using the brace notation. Imagine that it's request scoped, you could access it "plain" as follows:

But you can actually also use another EL variable in the braces (just unquote it):

So, we'd like to set it somewhere. The JSTL c:set tag is perfectly suitable for this: