EL expression question. Getting a value from a map that use Integer like key

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posted 15 years ago

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Hi, this is my code in my Servlet:

And I would like get the "mapValue 0" in the map1 attribute on my result.jsp using EL, but i can't get it
JSP code:

What is wrong??, I don't know how can I get a value from a map that use Integer keys using EL. If my map uses a String like key, I get the correct value. I think that is because in this EL expression, ${map1["0"]}, it is using "0" like a String, and map1.containsKey("0") is false.

How can I get it with EL?

Thanks

SCJP 6 - SCWCD 5 - SCBCD 5

Lee Kian Giap

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Posts: 213

posted 15 years ago

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Can you try this by changing your code to

Map<Long, String> map1 = new HashMap<Long,String>();
map1.put(0, "mapValue 0");
map1.put(1, "mapValue 1");
map1.put(2, "mapValue 2");

and get the value from EL using

${map1[0]}
${map1[1]}
${map1[2]}

SCJP 6, SCWCD 5, SCBCD 5

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