问如何删除java中数组的最后一个元素之后的逗号？

EN

<datafield tag="036F">
    <subfield code="n">Oxford University Press</subfield>
    <subfield code="n">1991-</subfield>
    </datafield>

<xsl:for-each select="$pica036F">
<xsl:variable name="codeN" select="./subfield[@code='n']" />
    <xsl:for-each select="$codeN">
    <xsl:variable name="codeBTemp" select="." />

    <xsl:value-of select="pica2dc:Pica036FNArray($codeBTemp)"></xsl:value-of>

</xsl:for-each>  
</xsl:for-each> 

 public static String Pica036FNArray(String codeBTemp) {
    String sb;
    sb = codeBTemp;
    setPica036FNArray(sb+",");
    return sb;

public static void setPica036FNArray(String pica036fnArray) {
        pica036FNArray += pica036fnArray;
    }