How to set textField height to 50% (1/3, 1/4) of container?

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              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd"
              name="Blank_A4_1"
              pageWidth="595" pageHeight="842" columnWidth="555"
              leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20"
              isFloatColumnFooter="true" isIgnorePagination="true"
              uuid="4cec75f3-8198-4738-adb0-9e9e38e97df4">
    <property name="com.jaspersoft.studio.data.defaultdataadapter"
              value="One Empty Record"/>
    <queryString><![CDATA[]]></queryString>
    <columnHeader>
        <band height="19" splitType="Stretch">
            <staticText>
                <reportElement x="30" y="0" width="161" height="19"
                               uuid="946fa381-bf2f-4587-93e6-708792519cf1"/>
                <box>
                    <topPen    lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                    <leftPen   lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                    <bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                    <rightPen  lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                </box>
                <text><![CDATA[Cloumn header]]></text>
            </staticText>
        </band>
    </columnHeader>
    <detail>
        <band height="40" splitType="Stretch">
            <textField isStretchWithOverflow="true">
                <reportElement positionType="Float" stretchType="ContainerHeight"
                               x="60" y="0" width="71" height="40"
                               uuid="877d54d6-86cd-438a-9e6f-80c41b0f7796"/>
                <box>
                    <topPen    lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                    <leftPen   lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                    <bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                    <rightPen  lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                </box>
                <textFieldExpression>
                    <![CDATA["Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 Text Field1 "]]>
                </textFieldExpression>
            </textField>
            <textField isStretchWithOverflow="true">
                <reportElement stretchType="ContainerHeight"
                               x="131" y="0" width="81" height="20"
                               uuid="632d8ae1-3e27-4ab3-8955-ce1434588f0e"/>
                <box>
                    <topPen    lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                    <leftPen   lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                    <bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                    <rightPen  lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                </box>
                <textFieldExpression><![CDATA["Text Field2"]]></textFieldExpression>
            </textField>
            <textField isStretchWithOverflow="true">
                <reportElement positionType="Float" stretchType="ContainerHeight"
                               x="131" y="20" width="81" height="20"
                               uuid="bb73df80-4366-482c-a6d9-d09534609fde"/>
                <box>
                    <topPen    lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                    <leftPen   lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                    <bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                    <rightPen  lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                </box>
                <textFieldExpression><![CDATA["Text Field3"]]></textFieldExpression>
            </textField>
        </band>
    </detail>
    <columnFooter>
        <band height="19" splitType="Stretch">
            <staticText>
                <reportElement x="30" y="0" width="161" height="19"
                               uuid="f51a8322-4a36-4982-9a6d-ea241368c65c"/>
                <box>
                    <topPen    lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                    <leftPen  lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                    <bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                    <rightPen  lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                </box>
                <text><![CDATA[Column footer]]></text>
            </staticText>
        </band>
    </columnFooter>
</jasperReport>