JNativeHook 2.0.2 example code with logging and System.out disabled

I've been playing around a little with JNativeHook Java library. "JNativeHook is a library to provide global keyboard and mouse listeners for Java. This will allow you to listen for global shortcuts or mouse motion that would otherwise be impossible using pure Java." What I really didn't like is it printed its licence details every time my code ran. I've dug into the JNI code and saw that it makes a callout to System.out to print this information. My solution was pretty simple, just disable the system output stream during initialisation.

This is the text that I was seeing every time my code ran...

JNativeHook Licence Text

JNativeHook: Global keyboard and mouse hooking for Java.

https://github.com/kwhat/jnativehook/

JNativeHook is free software: you can redistribute it and/or modify

it under the terms of the GNU Lesser General Public License as published

by the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.

JNativeHook is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU Lesser General Public License

along with this program. If not, see <http://www.gnu.org/licenses/>.

Ok yeah I get it, but it doesn't have to be printed every single time. It's enough to include the licence text file.

So this is how I initialise...

Init code

private static final Logger logger =

Logger.getLogger(GlobalScreen.class.getPackage().getName());

private PrintStream origOut;

...

private void init() throws NativeHookException

// disable System.out and turn off logging

origOut = System.out;

logger.setLevel(Level.OFF);

System.setOut(null);

// register the native hook and all mouse related listeners

GlobalScreen.registerNativeHook();

GlobalScreen.addNativeMouseListener(this);

GlobalScreen.addNativeMouseMotionListener(this);

GlobalScreen.addNativeMouseWheelListener(this);

// restore System.out

System.setOut(origOut);

}

Now when my code starts I don't get any notices and no logging info printed from JNativeHook.

-i