求助，为什么线程中的方法不执行

Thread A = new Thread(new Runnable(){
            @Override
            public void run() {
                try {
                    System.out.println("A-----");
                    code1(startTime, endTime/2, sdf, timeMap);
                }
                finally {
                }
            }
        });


        Thread C = new Thread(new Runnable(){
            @Override
            public void run() {
                try {
                    System.out.println("B-----");
                    code1(endTime/2,endTime,sdf,timeMap);
                }finally {
                }
            }
        });

A.start();
        C.start();


code1：
public void code1(Long startTime, Long endTime, SimpleDateFormat sdf, Map<String, Map<String, CarStateVo>> timeMap) {
        for (Long i = startTime + 1000; i <= endTime; i += 1000) {
            //每一秒要进行查询
            //先把上一秒的数据放进来
            String dateOld = sdf.format(new Date(i - 1000));
            String date2 = sdf.format(new Date(i));
            //现将上一秒的数据放入
            timeMap.put(date2, timeMap.get(dateOld));
            Map<String, CarStateVo> carStateVos = new HashMap<>();
            //现将上一秒的数据放入
            carStateVos.putAll(timeMap.get(date2));
                    /*LambdaQueryWrapper<CarStateCai> lambdaQ = Wrappers.lambdaQuery();
                    lambdaQ.eq(CarStateCai::getUpdateTime,new Date(i));
                    List<CarStateCai> list1 = this.list(lambdaQ);*/
            Map<String, Object> map = new HashMap<>();
            map.put("update_time", new Date(i));
            List<CarStateCai> list1 = carStateMapper.selectByMap(map);
            //判断查询的是否有数据
            //在这查询如果没有就要上一个了
            if (list1.size() > 0) {
                for (CarStateCai carStateCai : list1) {
                    if (carStateCai.getCarNum() != null && !"".equals(carStateCai.getCarNum())) {
                        //读取redis中的信息
                        String value = redisService.getValue(carStateCai.getCarNum());
                        CarStateDto carStateDto1 = JSON.parseObject(value, CarStateDto.class);
                        CarStateVo carStateVo = getCarStateVo(carStateDto1, carStateCai);
                        //如果有数就会被覆盖
                        carStateVos.put(carStateVo.getCarNum(), carStateVo);
                    }
                }
                String date1 = sdf.format(new Date(i));
                System.out.println(date1+"运行");
                timeMap.put(date1, carStateVos);
            }
        }
    }