How to Change Desktop background in Java using Java Native Access (JNA) Library

Java Native Access JNA

Java Native Access (JNA) is a community-developed library that provides Java programs easy access to native shared libraries without using the Java Native .

Dowload Java Native Access(JNA) 3.5.2 Library here ....

HaileePhotoDesktopSetter.java 

package us.javaj.johny.hailee.desktop;

import com.sun.jna.Native;

import com.sun.jna.platform.win32.Advapi32Util;

import com.sun.jna.platform.win32.WinReg;

import com.sun.jna.win32.StdCallLibrary;

public class HaileePhotoDesktopSetter {

public static void main(String[] args) {

HaileePhotoDesktopSetter.changeDesktopWallpaper();

}

private interface MyUser32 extends StdCallLibrary {

MyUser32 INSTANCE = (MyUser32) Native.loadLibrary("user32", MyUser32.class);

boolean SystemParametersInfoA(int uiAction, int uiParam, String fnm, int fWinIni);

}

public static void changeDesktopWallpaper() {

// -----------------------------------

String johny = "Johny Invoke the Desktop Background Setter with Love in Hailee Stienfeld ::";

System.out.println();

System.out.println("------------------------------Hailee Johny --------------------------------------");

System.out.println();

System.out.println(johny);

System.out.println();

String filePath = "E:\\Hailee-Johny\\Hailee_Stienfeld_Johny_S\\Desktop\\Hailee.jpg";

HaileePhotoDesktopSetter.setWallpaper(filePath);

System.out.println("Desktop Images Set Succussfully ");

System.out.println("Image File Path :: "+filePath);

}

public static void setWallpaper(String filePath) {

Advapi32Util.registrySetStringValue(WinReg.HKEY_CURRENT_USER, 

                                              "Control Panel\\Desktop", "FitWallpaper",filePath);

// WallpaperStyle = 10 (Fill), 6 (Fit), 2 (Stretch), 0 (Tile), 0 (Center)

// For windows XP, change to 0

int SPI_SETDESKWALLPAPER = 0x14;

int SPIF_UPDATEINIFILE = 0x01;

int SPIF_SENDWININICHANGE = 0x02;

// User32.System

boolean result =                MyUser32.INSTANCE.SystemParametersInfoA(SPI_SETDESKWALLPAPER, 0,

        filePath,SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE);

}

}

Desktop Wallpaper before running above code 

Desktop Wallpaper before running after code

Output in java console 

-------------------------------- Hailee Johny --------------------------------------

Johny Invoke the Desktop Background Setter with Love in Hailee Stienfeld ::

Desktop Images Set Succussfully 

Image File Path :: E:\Hailee-Johny\Hailee_Stienfeld_Johny_S\Desktop\Hailee.jpg