三叁

摘要：instead of print(x) to escape the default line-changing-output. print(str.ljust(size)) left-alignment with given size, samely, str.rjust(size) works j 阅读全文

摘要：The float can be converted to well known single-precision IEEE 754 number, why 754? It's the standard representation of single-precision numbers, used 阅读全文

摘要：Data used to deliver through net should be encapsulated. General encapsulation include 4 layer of header, in UNIX, it's: Application Layer (telnet, ft 阅读全文

摘要：recursively add folder Document to archive: (with all the files) recursively add folders to archive: (with all the files) add path etc to certain file 阅读全文

摘要：in .cpp file, wherever you want, wrap QString with a tr("somesz") rendering it ready to be translated. in .pro file, specify the readable translation 阅读全文

摘要：I used to load library using 1 single .dll file, so when I happen to do method calling between 2 projects in a solution, I got puzzled.. In the soluti 阅读全文

摘要：In Java, byte = 8 bit, char = 16 bit In C/C++, char = 8 bit There is difference because Java uses Unicode, however C uses ASCII as basic character col 阅读全文

摘要：Examples to: Use URL class to parse URLs and download the network resources specified by a URL Use URLConnection class to gain more cntrl over the dow 阅读全文

摘要：To prevent Memory Consistency Errors(MCEs), it is good practice to specify synchronized class specifier, and mark all the related methods as synchroni 阅读全文

摘要：In Java, the main process can have several threads at a time, but only a few of them can run concurrently, so it is needed to cancel some thread at ti 阅读全文

摘要：Files.probeContentType() is an instance of FileTypeDetector class's abstract method String FileTypeDetector.probeContentType(), it's an extension base 阅读全文

摘要：A file's status is 3-valued: So !Files.exists(path) != Files.notExists(path). If both exists and notExists return false, the existence of the file can 阅读全文

摘要：Using BigDecimal to perform precise calculations with floats. BigDecimal is a class type. So declare/construct one BigDecimal is in the form like: Do 阅读全文

摘要：I/O Streams, it simplifies I/O operations, write a whole object out to stream & read back. File I/O and file system operations, including random acces 阅读全文

摘要：Java learning scripts 阅读全文

摘要：Java 8 O'Reilly 阅读全文