I’m working on XUbuntu 13.04 and developing swing applications. As I just wanted to try that application I ran into java.lang.NoClassDefFoundError: Could not initialize class java.awt.Toolkit
on startup.
I’ve found several questions about server/client vms and noticed that I have a server VM and that for Linux 64 there is no client VM anymore. But nevertheless IMHO this problem shouldn’t depend on which VM I’m running on.
Has anybody else noticed that problem and has solved it? What am I doing wrong? With 64bit jdk everything works fine, but when I try to use the 32bit jdk the startup fails.
Thanks in advance!
P.S.: Java version is 1.7.0_25
and same with 1.7.0_09
EDIT
When using headless mode, the following exceptions occur:
java.lang.reflect.InvocationTargetException at java.awt.EventQueue.invokeAndWait(EventQueue.java:1272) at java.awt.EventQueue.invokeAndWait(EventQueue.java:1247) at javax.swing.SwingUtilities.invokeAndWait(SwingUtilities.java:1349) at Main.main(Main.java:218) Caused by: java.awt.HeadlessException at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:207) at java.awt.Window.<init>(Window.java:535) at java.awt.Frame.<init>(Frame.java:420) at java.awt.Frame.<init>(Frame.java:385) at javax.swing.JFrame.<init>(JFrame.java:180) at ..MyFrame.<init>(MyFrame.java:23)
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Answer
Okay, finally I’ve found the answer. Thanks for the effort! The problem is that I had libxtst6
installed but only the 64bit-version of it.
sudo apt-get install libxtst6:i386
did the trick for me.
How did I find this answer? I ldd
ed around a bit, but nothing, as you can see in the following:
$ ldd jdk1.7.0_25_x86/jre/lib/i386/xawt/libmawt.so linux-gate.so.1 => (0xf7769000) libpthread.so.0 => /lib/i386-linux-gnu/libpthread.so.0 (0xf76ee000) libm.so.6 => /lib/i386-linux-gnu/libm.so.6 (0xf76c2000) libawt.so => jdk1.7.0_25_x86/jre/lib/i386/xawt/../libawt.so (0xf760f000) libXext.so.6 => /usr/lib/i386-linux-gnu/libXext.so.6 (0xf75fd000) libX11.so.6 => /usr/lib/i386-linux-gnu/libX11.so.6 (0xf74c9000) libXrender.so.1 => /usr/lib/i386-linux-gnu/libXrender.so.1 (0xf74bf000) libdl.so.2 => /lib/i386-linux-gnu/libdl.so.2 (0xf74ba000) libXtst.so.6 => /usr/lib/i386-linux-gnu/libXtst.so.6 (0xf74b2000) libXi.so.6 => /usr/lib/i386-linux-gnu/libXi.so.6 (0xf74a2000) libjava.so => jdk1.7.0_25_x86/jre/lib/i386/xawt../libjava.so (0xf747e000) libjvm.so => not found libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0xf72d5000) /lib/ld-linux.so.2 (0xf776a000) libjvm.so => not found libxcb.so.1 => /usr/lib/i386-linux-gnu/libxcb.so.1 (0xf72b3000) libjvm.so => not found libverify.so => java/jdk1.7.0_25_x86/jre/lib/i386/xawt/../libverify.so (0xf72a7000) libXau.so.6 => /usr/lib/i386-linux-gnu/libXau.so.6 (0xf72a2000) libXdmcp.so.6 => /usr/lib/i386-linux-gnu/libXdmcp.so.6 (0xf729b000) libjvm.so => not found
So that was the point when I ended trusting my IDE and started a sample application on the command line. And the command line again was nice to me:
$ jdk1.7.0_25_x86/bin/java Main Exception in thread "main" java.lang.UnsatisfiedLinkError: jdk1.7.0_25_x86/jre/lib/i386/xawt/libmawt.so: libXtst.so.6: cannot open shared object file: No such file or directory at java.lang.ClassLoader$NativeLibrary.load(Native Method) at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1957) at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1882) at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1843) at java.lang.Runtime.load0(Runtime.java:795) at java.lang.System.load(System.java:1061) at java.lang.ClassLoader$NativeLibrary.load(Native Method) at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1957) at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1882) at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1864) at java.lang.Runtime.loadLibrary0(Runtime.java:849) at java.lang.System.loadLibrary(System.java:1087) at sun.security.action.LoadLibraryAction.run(LoadLibraryAction.java:67) at sun.security.action.LoadLibraryAction.run(LoadLibraryAction.java:47) at java.security.AccessController.doPrivileged(Native Method) at java.awt.Toolkit.loadLibraries(Toolkit.java:1646) at java.awt.Toolkit.<clinit>(Toolkit.java:1668) at java.awt.Component.<clinit>(Component.java:595) at Main.main(Main.java:5)