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POLockDisplay: Unable to load X11 when using JNA to lock display
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Id
7647914
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7648158
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CreationDate
2011-10-04T12:31:53.297
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LastActivityDate
2011-11-13T13:46:30.630
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LastEditorDisplayName
text
Body
I am trying to lock the display (disallowing the user to use the keyboard and mouse) in Java, using X11 through JNA. However, when I try running the application on Windows, I get this error: <pre><code>java.lang.UnsatisfiedLinkError: Unable to load library 'X11': com.sun.jna.Native.open(Ljava/lang/String;)J at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:166) at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:239) at com.sun.jna.Library$Handler.<init>(Library.java:140) at com.sun.jna.Native.loadLibrary(Native.java:393) at com.sun.jna.Native.loadLibrary(Native.java:378) at com.sun.jna.platform.unix.X11.<clinit>(X11.java:347) at octostar.LinuxHelper.blockInput(LinuxHelper.java:77) at .... .... </code></pre> My code is this (the input parameter is a boolean 'block'): <pre><code> boolean returnVal = true; X11.Display dpy = null; final X11 x11 = X11.INSTANCE; final Xss xss = Xss.INSTANCE; try { dpy = x11.XOpenDisplay(null); if (block) xss.XLockDisplay(dpy); else xss.XUnlockDisplay(dpy); } catch (Exception ex){ returnVal = false; } finally { if (dpy != null) x11.XCloseDisplay(dpy); dpy = null; } return returnVal; </code></pre> The error occurs at X11.INSTANCE (which is the line octostar.LinuxHelper.blockInput(LinuxHelper.java:77) as in the error message above) In another part of my code, I get this error: <pre><code>java.lang.NoClassDefFoundError: Could not initialize class com.sun.jna.platform.unix.X11 at octostar.LinuxHelper.getIdleTimeMillis(LinuxHelper.java:50) </code></pre> I tried typing X11 in terminal, and they told me to do an installation, which I did after that, but every subsequent time I type X11 it says it's not installed. When I type the installation command though, I am told that I have the latest version already. This is all very confusing to me. If anyone could help shed some light on this I would greatly appreciate it!
Tags
<java><linux><x11><jna>
Title
LockDisplay: Unable to load X11 when using JNA to lock display
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