Hi, I'm writting webserver and I want to change the directory. How can I do this in java? e.g I've working dir. /aaa/bb/t.txt and I want to access fiel in dir /aaa/bc/p.txt How could I do this? Any help will be appreciated? Thanks/

I don't believe the working directory of your Java application can be changed so if it was /aaa/bb when you launched your Java application that is what it will stay. There is no need to change it to access files in other directories as the java.io.File constructor takes a qualified file name which may include an absolute or relative path. In the scenario you describe you would create the two files like this // file in working directory File tFile = new File("t.txt"); // file in another directory using relative path File pFile = new File(".." + File.separator + "bc" + File.separator + "p.txt"0; // access both files FileInputStream tInputStream = new java.io.FileInputStream(tFile); FileInputStream pInputStream = new java.io.FileInputStream(pFile);