Question

I want to make a java program witch automatically
opens a specified program to a given file
for example a mp4 file should be opened with a Converter to convert it to avi

So my question is:
is it possible to open a file in java with a given program, but not the default one?
And if yes, how?

Answer 1

As long as you know the exact path or the program has a known envirment variable, it’s quite easy:

try
{
    Process p = Runtime.getRuntime().exec("notepad Q:/Test/tmp.txt");
    BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
    stdInput.close();
}
catch(Exception k)
{
    JOptionPane.showMessageDialog(null, k.getMessage());
}

This opens the file tmp in notepad.