java生成编号

public static String getNewEquipmentNo(String equipmentType, String equipmentNo){
        String newEquipmentNo = "00001";

        if(equipmentNo != null && !()){
            int newEquipment = (equipmentNo) + 1;
            newEquipmentNo = (equipmentType + "%05d", newEquipment);
        }

        return newEquipmentNo;
    }

public static void main(String[] args) {
        String equipmentNo = ("****", "00001");
        ("生成编号为：" + equipmentNo);
    }