How to solve IllegalArgumentException: Property is not indexed

Question

I have a property in jsp like the following

   <html:text property="sequenceNumbersMap[0]"  styleId="sequenceNumbersMap[0]" value="0"/>
   <html:text property="sequenceNumbersMap[1]"  styleId="sequenceNumbersMap[1]" value="1"/>
   <html:text property="sequenceNumbersMap[2]"  styleId="sequenceNumbersMap[2]" value="2"/>
   <html:text property="sequenceNumbersMap[3]"  styleId="sequenceNumbersMap[3]" value="3"/>

and ActionForm has the property like

Map sequenceNumbersMap;

and getter/setter

public Map<Integer, Integer> getSequenceNumbersMap() {
        return sequenceNumbersMap;
    }

    public void setSequenceNumbersMap(Map<Integer, Integer> sequenceNumbersMap) {
        this.sequenceNumbersMap = sequenceNumbersMap;
    }

but when i try to submit the jsp i get the following exception :

java.lang.IllegalArgumentException: Property 'sequenceNumbersMap' is not indexed

would someone help me to fix this issue?

Thanks

score 1 · Answer 1 · answered Oct 05 '15 at 17:36

1

A map is not ordered so sequenceNumbersMap[i] does not mean anything. If you mean to get the value mapped to i rather than getting the i-th item in the map (which has no sense again), you can do it with sequenceNumbersMap.get(i).

answered Oct 05 '15 at 17:36

Gaël J

11,274
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score 0 · Answer 2 · edited May 23 '17 at 12:14

0

You must either iterate through a map differently: How to loop through a HashMap in JSP?

Or use a different kind of data structure for sequence numbers (indexed, as it was pointed in the exception, e.g. java.util.List).

edited May 23 '17 at 12:14

Community

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1

answered Oct 05 '15 at 17:32

dpavkov

31
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How to solve IllegalArgumentException: Property is not indexed

2 Answers2