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能够使用java开发出类似qq的聊天小程序达到了java学习的什么水平？

作为一个已经写了十几年代码的老司机，在写代码之余还会写点技术感受，或者分享一些编程心的，几年下来也积攒了几万粉丝，也有一些对于技术不是很懂的小伙伴，在交流过程中经常说出这样的话，开发一个类似qq的软件需要多长时间，需要花费多少资金。软件这种东西可以说的很大，也可以说的很小。就拿简单的聊天功能其实就是...

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