PHP -> JAVA Função CNPJ

function CNPJ($cgcint)
{

$dg = '';

$cgcint = ereg_replace ("-", "", $cgcint);
$cgcint = ereg_replace ("/", "", $cgcint);
$cgcint = ereg_replace ("\.", "", $cgcint);

$cgc = substr($cgcint,0,12);
$digito = substr($cgcint,-2);

$mult ='543298765432';
for ($j = 1; $j <= 2; $j++) {
$soma = 0;
for ($i = 0; $i <= 11; $i++) {
$soma = $soma + (substr($cgc,$i,1)) * (substr($mult,$i,1));
}

if ($j == 2){
$soma = $soma + (2 * $digitoc);
}
$digitoc = (($soma * 10) % 11);
if ($digitoc == 10){
$digitoc = 0;
}
$dg = $dg.$digitoc;
$mult = '654329876543';
}
if ($dg != $digito) {
$okcgc = 0;
} else {
$okcgc = 1;
}
return $okcgc;
}