try this.
--------
import java.io.*;
class MyFile
{
MyFile()
{
File f = new File("..\\"); //you can set the directory
File fnew = new File(f,"test1.txt");
try
{
fnew.createNewFile();
}catch (IOException ioe)
{}
}
static public void main(String[] a)
{
MyFile mf = new MyFile();
}
}