Recover my Java skills ...
Garbage collection is not destruction
Overload: Same class, diff methods with same name and diff params. Override: Diff class, same method.
Q: Why is String class considered immutable? A: The String class is immutable, so that once it is created a String object cannot be changed. Since String is immutable it can safely be shared between many threads ,which is considered very important for multithreaded programming.
- Regex
- Multi-threading
- *Set, *Map, *List ...
- Encoding
- Linux commands
- Given a log file with format: " 1,2,start 2,3,end 2,4, start """" where each tuple is a (job_id,time,option) where option is start or end, find a way to map concurrent processes to each other