Change desktop background of MAC sytem using Java native access

Question

I have got a code snippet to change system desktop using JNA, it is worked fine for me.

What change i need to make this code for working on Mac Os.

Help is highl

Answer 1

Looks like you need to Map the NSWorkspace class to JNA. Define an interface that extends Library class in JNA. Then map the setDesktopImageURL:forScreen:options:error: method ot JNA.

http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/ApplicationKit/Classes/NSWorkspace_Class/Reference/Reference.html

Answer 2

Here's how you can do it without JNA.

public void setWallpaper(File file)
throws Exception {
    String as[] = {
            "osascript", 
            "-e", "tell application \"Finder\"", 
            "-e", "set desktop picture to POSIX file \"" + file.getAbsolutePath() + "\"",
            "-e", "end tell"
    };
    Runtime runtime = Runtime.getRuntime();
    Process process;
    process = runtime.exec(as);
}

Credits

https://stackoverflow.com/a/5007344/1401250

https://sourceforge.net/p/jawc-wallpaperc/code/HEAD/tree/trunk/Jawc/src/it/jwallpaper/platform/impl/MacPlatform.java#l38