How to add a symbol ₺ (Turkish Lira) in iReport

$P{DETAILPARAM} = " Tarihinden bu güne kadar <style isBold='true' pdfFontName='DejaVu Sans'>"+new java.text.DecimalFormat("#,##0.00").format($F{TOTAL_DEBT})+" ₺ </style> Borcunuz vardır."
Font = DejaVu Sans

This like add $P{DETAILPARAM} in parameter. And export PDF, but do not show "₺" this symbol.
What must I do?

The Turkish Lira has unicode U+20BA and since it fairly new (2012) you need to be sure that this unicode is supported by your selected font .

I tried with the font dejavu-serif, to understand how to download and install correctly see: How can I display "$£Ω€απ⅔" in Jasperserver PDF using iReport?

Result

This was my jrxml code:

<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="FontTest" pageWidth="595" pageHeight="842" whenNoDataType="AllSectionsNoDetail" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="2347c131-1884-430a-b77f-59f08f896c8a">
    <parameter name="number" class="java.lang.Double" isForPrompting="false">
        <defaultValueExpression><![CDATA[new Double(1000.23)]]></defaultValueExpression>
    </parameter>
    <queryString>
        <![CDATA[]]>
    </queryString>
    <title>
        <band height="25">
            <textField>
                <reportElement x="0" y="0" width="100" height="25" uuid="bc2ae040-f9af-4732-82fe-8fe8b71696bd"/>
                <textElement>
                    <font fontName="DejaVu Serif" size="14"/>
                </textElement>
                <textFieldExpression><![CDATA["\u20BA"]]></textFieldExpression>
            </textField>
            <textField pattern="₺ #,##0.00">
                <reportElement x="100" y="0" width="200" height="25" uuid="ee49d149-394b-4ac6-a0a2-6d207b0c8d89"/>
                <textElement>
                    <font fontName="DejaVu Serif" size="14"/>
                </textElement>
                <textFieldExpression><![CDATA[$P{number}]]></textFieldExpression>
            </textField>
        </band>
    </title>
</jasperReport>

Some design notes:

When formatting numbers it is better to apply pattern, since this will keep correct class if exported to for example excel.
I could not achieve the pattern "\u20BA #,##0.00" even if this works directly in java, I need to further investigate this, seems like jasper report is doing a replacement of the "\" had to put the char directly in pattern (even if this is not recommend).