// Лицензия JCP
License license = new License();
long installDateValue = license.getFirstInstDat();

Date installDate = new Date(installDateValue);
System.out.println("Install date: " + installDate);

long endDateValue = license.getEndDate();

if (endDateValue != 0) { // permanent
	Date endDate = new Date(endDateValue);
	System.out.println("End date: " + endDate);
}