How do I print a file using the default registered application?

The example code below shows you how to print a file using the default registered application’s print command for the corresponding file type. As an example, on Windows notepad.exe is the default application for printing a .txt file.

To print a file using the default registered application we call the java.awt.Desktop.print(File) method. The print() method takes a parameter of File, which is the reference to a file to be printed. The code snippet below, when run on Windows, will open notepad.exe and print the data.txt file.

package org.kodejava.example.awt;

import java.awt.*;
import java.io.File;
import java.io.IOException;

public class RunningDefaultAppPrint {
    public static void main(String[] args) {
        File file = new File("data.txt");
        try {
            Desktop desktop = Desktop.getDesktop();

            //
            // Prints a file with the native desktop printing
            // facility, using the associated application's
            // print command.
            //
            desktop.print(file);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

How do I edit a file using the default registered application?

For editing a file using the default registered or associated application we can do a call to the java.awt.Desktop.edit(File) method. In the code snippet below we will edit a PNG file. Using the edit() method of the Desktop class will open the default registered application for PNG files. For example on Windows the could be the Windows Paint or GIMP on the Linux operating system.

package org.kodejava.example.awt;

import java.awt.*;
import java.io.File;
import java.io.IOException;

public class RunningDefaultAppEdit {
    public static void main(String[] args) {
        File file = new File("logo.png");
        try {
            //
            // Edit a file using the default program for the
            // file type. In the example we will launch a
            // default registered program to edit a PNG image.
            //
            Desktop desktop = Desktop.getDesktop();
            desktop.edit(file);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}