Adharmonics Quantitative software engineer

Adharmonics 的Quantitative software engineer（java），大概流程是先一轮电面，再一轮online test，之后就是onsite，估计每个人题目都是一样的。


第一轮电话面试
java 什么时候是pass by value/ by reference map有几种，什么时候怎么用
如何获得hashcode， hashcode如何重写，

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ngs outlined in item 1 above. Note that the look and feel of the GUI is not important (as long as the functionality is there).

3. Now, change the Swing application a little bit so the user could enter the path to a folder, and the application should process all excel files (i.e. file name ends with .xls) in that folder.    Please note, the folder could contain a large number of excel files with large number of rows, so you need to find a way to improve the performance of the application and GUI. - hint: multithreading