As with Arrays, you can use MXML to define the contents of a collection

         

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    <!-- charts/ArrayCollectionOfMXMLObjectsDataProvider.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
    xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:s="library://ns.adobe.com/flex/spark"
    height="600">
    <fx:Declarations>
        <s:ArrayCollection id="expenses">
            <fx:Object Month="January" Profit="2000" Expenses="1500"
                Amount="450" />
            <fx:Object Month="February" Profit="1000" Expenses="200"
                Amount="600" />
            <fx:Object Month="March" Profit="1500" Expenses="500"
                Amount="300" />
            <fx:Object Month="April" Profit="500" Expenses="300"
                Amount="500" />
            <fx:Object Month="May" Profit="1000" Expenses="450" Amount="250" />
            <fx:Object Month="June" Profit="2000" Expenses="500"
                Amount="700" />
        </s:ArrayCollection>
    </fx:Declarations>
    <s:layout>
        <s:VerticalLayout />
    </s:layout>
    <s:Panel title="Column Chart">
        <s:layout>
            <s:VerticalLayout />
        </s:layout>
        <mx:ColumnChart id="myChart" dataProvider="{expenses}"
            showDataTips="true">
            <mx:horizontalAxis>
                <mx:CategoryAxis dataProvider="{expenses}"
                    categoryField="Month" />
            </mx:horizontalAxis>
            <mx:series>
                <mx:ColumnSeries xField="Month" yField="Profit"
                    displayName="Profit" />
                <mx:ColumnSeries xField="Month" yField="Expenses"
                    displayName="Expenses" />
            </mx:series>
        </mx:ColumnChart>
        <mx:Legend dataProvider="{myChart}" />
    </s:Panel>
</s:Application>

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As with Arrays, you can use MXML to define the contents of a collection : Array « Data Model « Flex

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