How do I delete extra space between rows in Jasper reports?

This is my JRXML Code:

<?xml version="1.0" encoding="UTF-8"?>
<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="example_report" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20">
    <property name="ireport.zoom" value="1.0"/>
    <property name="ireport.x" value="0"/>
    <property name="ireport.y" value="0"/>
    <field name="name" class="java.lang.String"/>
    <field name="test" class="java.lang.String"/>
    <field name="price" class="java.lang.Double"/>
    <background>
        <band splitType="Stretch"/>
    </background>
    <title>
        <band height="79" splitType="Stretch"/>
    </title>
    <pageHeader>
        <band height="35" splitType="Stretch"/>
    </pageHeader>
    <columnHeader>
        <band height="61" splitType="Stretch"/>
    </columnHeader>
    <detail>
        <band height="125" splitType="Stretch">
            <textField>
                <reportElement stretchType="RelativeToBandHeight" x="0" y="0" width="209" height="20"/>
                <textElement/>
                <textFieldExpression class="java.lang.String"><![CDATA[$F{name}]]></textFieldExpression>
            </textField>
            <textField>
                <reportElement x="209" y="0" width="201" height="20"/>
                <textElement/>
                <textFieldExpression class="java.lang.String"><![CDATA[$F{test}]]></textFieldExpression>
            </textField>
            <textField>
                <reportElement x="410" y="0" width="145" height="20"/>
                <textElement/>
                <textFieldExpression class="java.lang.Double"><![CDATA[$F{price}]]></textFieldExpression>
            </textField>
        </band>
    </detail>
    <columnFooter>
        <band height="45" splitType="Stretch"/>
    </columnFooter>
    <pageFooter>
        <band height="54" splitType="Stretch"/>
    </pageFooter>
    <summary>
        <band height="42" splitType="Stretch"/>
    </summary>
</jasperReport>

When I add data sets to compiled reports in my application, I gain additional space between rows How do I delete this extra space?

Solution

I think that's because you declared 125px for each line:

<detail>
    <band height="125" splitType="Stretch">

But only 20px is used:

<reportElement stretchType="RelativeToBandHeight" x="0" y="0" width="209" height="20"/>

Try setting the detail band to the height you use (20px):

<detail>
    <band height="20" splitType="Stretch">

I'm not sure because I haven't used Jasper for months, but try this