Java I/O | The Developer's Info

Reading files in Java

By Oleg Mazurashu,on February 25th,2010%

I am going to show example which shows how to read a file in Java. If you want to read some file you should start with FileInputStream. This class is a concrete subclass of InputStream. It provides an input stream connected to a particular file. Example:

package tutorial;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import . . . →Read More:Reading files in Java

Getting system root directory in Java

By Oleg Mazurashu,on February 25th,2010%

If you are working with file-system in Java,you should understand that your program can run in other types of OS:(Windows,Unix,Linux). These OS has own file-system structure. For example you need to read or write file in Windows,which located at disk C:\,you should write:

File root = new File(“C:\\”);File dir . . . →Read More:Getting system root directory in Java

Getting path to user’s home directory in Java

By Oleg Mazurashu,on February 25th,2010%

There is a way to find out path to user’s home folder. Need to get system property:

System.getProperty(“user.home”);

That’s all.

Getting working directory in Java

By Oleg Mazurashu,on February 25th,2010%

Sometimes need to know path to your working directory. It is very easy. Here I am going to show snippet of code which helps with this:

System.getProperty(“user.dir”);

It returns String. Call it and you will know your current working directory.

Using InputStream in Java

By Oleg Mazurashu,on February 24th,2010%

InputStream is the abstract super class for all input streams. It declares the three basic methods needed to read bytes of data from a stream. It also has methods for closing streams,checking how many bytes of data are available to be read,skipping over input,marking a position in a stream and resetting back . . . →Read More:Using InputStream in Java