Erro XMLBeans

<xs:schema targetNamespace="http://openuri.org/easypo"
    xmlns:po="http://openuri.org/easypo"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    elementFormDefault="qualified">

    <xs:element name="purchase-order">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="customer" type="po:customer"/>
                <xs:element name="date" type="xs:dateTime"/>
                <xs:element name="line-item" type="po:line-item" minOccurs="0" maxOccurs="unbounded"/>
                <xs:element name="shipper" type="po:shipper" minOccurs="0"/>
            </xs:sequence>
        </xs:complexType>
    </xs:element>
    <xs:complexType name="customer">
        <xs:sequence>
            <xs:element name="name" type="xs:string"/>
            <xs:element name="address" type="xs:string"/>
        </xs:sequence>
    </xs:complexType>
    <xs:complexType name="line-item">
        <xs:sequence>
            <xs:element name="description" type="xs:string"/>
            <xs:element name="per-unit-ounces" type="xs:decimal"/>
            <xs:element name="price" type="xs:double"/>
            <xs:element name="quantity" type="xs:int"/>
        </xs:sequence>
    </xs:complexType>
    <xs:complexType name="shipper">
        <xs:sequence>
            <xs:element name="name" type="xs:string"/>
            <xs:element name="per-ounce-rate" type="xs:decimal"/>
        </xs:sequence>
    </xs:complexType>
</xs:schema>

D:\Java\desenvolvimento\netbeans\testes\TesteXmlBeans\web\WEB-INF\classes>scomp
-out weather.jar weather_latlong.xsd
Time to build schema type system: 0.875 seconds
Time to generate code: 0.156 seconds
java.io.IOException: Cannot run program "D:\Java\desenvolvimento\netbeans\testes
\TesteXmlBeans\web\WEB-INF\classes\javac": CreateProcess error=2, O sistema nÒo
pode encontrar o arquivo especificado
java.io.IOException: CreateProcess error=2, O sistema nÒo pode encontrar o arqui
vo especificado
java.io.IOException: Cannot run program "D:\Java\desenvolvimento\netbeans\testes
\TesteXmlBeans\web\WEB-INF\classes\javac": CreateProcess error=2, O sistema nÒo
pode encontrar o arquivo especificado
        at java.lang.ProcessBuilder.start(Unknown Source)
        at java.lang.Runtime.exec(Unknown Source)
        at java.lang.Runtime.exec(Unknown Source)
        at org.apache.xmlbeans.impl.tool.CodeGenUtil.externalCompile(CodeGenUtil
.java:231)
        at org.apache.xmlbeans.impl.tool.SchemaCompiler.compile(SchemaCompiler.j
ava:1126)
        at org.apache.xmlbeans.impl.tool.SchemaCompiler.main(SchemaCompiler.java
:368)
Caused by: java.io.IOException: CreateProcess error=2, O sistema nÒo pode encont
rar o arquivo especificado
        at java.lang.ProcessImpl.create(Native Method)
        at java.lang.ProcessImpl.<init>(Unknown Source)
        at java.lang.ProcessImpl.start(Unknown Source)
        ... 6 more
BUILD FAILED
D:\Java\desenvolvimento\netbeans\testes\TesteXmlBeans\web\WEB-INF\classes>