How do I display the contents of a directory? The object's is. Directory() method can be used to determine if the object is a directory. If it is a directory, an array of the File objects within it can be obtained by a call to list. Files(). This will be demonstrated with this project: The Directory. Contents class gets a File object to the current directory. It gets an array of all the File objects within the current directory by calling f. Files(). It displays whether each File object is a file or a directory and displays its canonical path.
How to copy file in Java Program example tutorial. How to copy file in Java from one directory to another is common requirement, given that there is no direct method in File API for copying files from one location to another. Painful way of copying file is reading from File. Input. Stream and writing same data to File. Output. Stream to another directory. Though this process works its pretty raw to work with and best approach is for anyone to create library for common File operation like cut, copy, paste etc. Thankfully you don't need to reinvent wheel here, there are some open source library available which allows us to copy file in Java easily from one directory to another. One of such library is Apache commons IO which contains a class called File. Utils, which provides utility method for file related operation. File. Utils. copy. File(source. File, target. File) can be used to copy files in Java. Though there are some * better ways to do it like Using Apache Commons Utils library has File. Utils class * to copy files in Java ** @author Javin*/publicclass File. Copy. Example . This simple Java program can be extended to copy all files from one directory to another directory by just providing name of source and directory and then Java program will pick up each file and create another file with same name in target directory. If you are going to do in plain Java its requires lot of code and chances of error is high but if you use Apache Commons io library and File. Hadoop Tutorial 1 -- Running WordCount. Check the contents of your directory. Run the wordcount java program from the example directory in hadoop. This Java example shows how list contents(files and sub-directories) of a directory using list method of Java File class. Utils class it just matter of few line. As Joshua Bloach has rightly said in Effective Java, “prefer library over custom code”. Let me know if you find any bug on this Java File copy program .
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
November 2016
Categories |