How to avoid Index Out Of Boundary Exeption

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原创最新推荐文章于 2026-05-22 19:45:00 发布 187 阅读 AI 写同款· GEO 优化 ›

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1. Use fori iterate, get the index

2. current index has to less than list size minus one

For example:
[1,2,3,4,5] size is 5
Index (4) is the last element, which is 5
So index number has to be less than 4, which is the (size -1)

  if (deviceInfos.size() -1 > i2) {
                double lngtd1 = Double.parseDouble(deviceInfos.get(i2).getLngtd());
                double lngtd2 = Double.parseDouble(deviceInfos.get(i2 + 1).getLngtd());
                double lattd1 = Double.parseDouble(deviceInfos.get(i2).getLattd());
                double lattd2 = Double.parseDouble(deviceInfos.get(i2 + 1).getLattd());
                double distance = DistanceUtils.getDistance(lngtd1, lattd1, lngtd2, lattd2);
                json.put("distance", distance+"m");
            }else {
                json.put("distance","0m");
            }