I should always sort the number arrays after the order of given columns. So I finally write a Comparator class which save all my breath. We should note the implementation for the Constructor, the arithmetic operators won’t work here. We…
With generic typ List With generic typ Array
There are many ways to read file into a List in Java. commons-io guava Java 7.0
line separator (Windows: “\r\n”, UNIX: “\n”) 1. BufferedWriter newline() 2. System.lineSeparator() 3. System.getProperty(“line.separator”) file separator file.separator（windows:”\”; unix:”/”) 1. BufferedWriter newline() 2. System.getProperty(“file.separator”) 3. File.pathSeparator Annotation: In Windows: “D:\codehamster”, you can change it to “D:/codehamster” or “D:\\codehamster”
BitSet and FastBit will always change themselves if they do some set operations, just like and, or, andNot. To avoid such cases, you should write a extended classes: For BitSet: MyBitSet For FastBitSet: MyFastBitSet
Javolution is a High-performence java library, it is not only fast but also very comfortable to use. FastBitSet of Javolution is similar to BitSet of Java native Bib. But there are still some differences in usage: 1. BitSet is cloneable,…
Some times you might face the problem that java application can not be allowed to run in your webbrowser: Error Message: Application Blocked, Your security settings have blocked a local application from runing. What can you do at this time?…
