an some one help me in converting this part of the PHP code into Java
class Handler {
//an array of node handlers, these are the child handlers
var $groups;
var $expressions;
var $name;
var $thisExpression;
var $database;
function XPathRootHandler($database, $name, $thisExpression) {
$this->groups = array();
$this->expressions = array();
$this->database = $database;
$this->name = $name;
$this->thisExpression = $thisExpression;
$this->createExpressions();
$this->dropTable();
$this->createTable();
$this->createGroups()
}