Setting download path to %appdata% and further

Question

In a download (Java) script can you set the location to %appdata%, %home%, ect.? I've tried adding this the script in many different ways but all I come up with are errors. Do I need launch a .bat file before hand to set the directory, cd and everything?

Answer 1

You can set the path to an environment variable using System.getenv() (no .bat script required):

File dir = new File(System.getenv("APPDATA"), "DataFolder");

To make sure the folder is created:

if (!dir.exists())
{
    try
    {
        dir.mkdirs();
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
}

To make a file in the folder and make sure it is created:

File file = new File(dir, "log.txt");
if (!file.exists())
{
    try
    {
        file.createNewFile();
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
}