scala - 突然发现现在很多牛逼的系统都是用java写的，都和jvm有关，熟悉java有必要吗？

Question

突然发现现在很多牛逼的系统都是用java写的，都和jvm有关，比如hadoop,zookeeper,kafka, 这些系统都提供api父类，可以继续开发自己的系统，感觉不会java，或者java不熟练，是个很大的短板啊， 请问大家怎么看？

Answer 1

As a programmer, don’t stick to which language to learn. The important thing is to understand the scope of application of each one, and then choose the optimal language according to the architecture of the system you want to design.

Answer 2

It’s just that each language is doing what it is good at. If you want to learn, just learn.

Answer 3

A ruler is longer and an inch is shorter

Answer 4

It doesn’t matter much, as long as you use awesome language, it’s cool. C language is even more awesome. It all depends on your work needs and your own preferences

Answer 5

In fact, many technical books also use Java to describe techniques. I have listed a few here

1. Refactor

2. Refactoring and Paradigm

3. Test Driven Development

It would be a pity if you can’t understand the code inside, so it’s good to learn