Difference between revisions of "JavaAwt"
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| − | == | + | === issues with classpath === |
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Got a problem when building classpath: Invalid flag -1.5 | Got a problem when building classpath: Invalid flag -1.5 | ||
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=== Java on the stick === | === Java on the stick === | ||
| − | I | + | I successfully built and executed JamVM and Classpath, see Creating boot image. |
| + | However, running a small Java program that used AWT failed with the following exception trace: | ||
po@gumstix-custom-verdex:~/proto$ java ShowMe | po@gumstix-custom-verdex:~/proto$ java ShowMe | ||
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at java.awt.Frame.<init>(Frame.java:246) | at java.awt.Frame.<init>(Frame.java:246) | ||
at ShowMe.main(ShowMe.java:35) | at ShowMe.main(ShowMe.java:35) | ||
| − | Caused by: java.lang.UnsatisfiedLinkError: Native library `gtkpeer' not found (as file | + | Caused by: java.lang.UnsatisfiedLinkError: Native library `gtkpeer' not found (as file `libgtkpeer.so') in gnu.classpath.boot.library.path and java.library.path |
at java.lang.Runtime.loadLibrary(Runtime.java:763) | at java.lang.Runtime.loadLibrary(Runtime.java:763) | ||
at java.lang.System.loadLibrary(System.java:662) | at java.lang.System.loadLibrary(System.java:662) | ||
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at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:583) | at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:583) | ||
...4 more | ...4 more | ||
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| + | This was (once I understood the classpath recipe) easily fixed by making sure that my image recipe had lines for installing both classpath and classpath-awt, like so: | ||
| + | |||
| + | classpath \ | ||
| + | classpath-awt \ | ||
| + | |||
| + | adding support for serial port using RXTX was done by adding the following lines: | ||
| + | librxtx-jni \ | ||
| + | librxtx-java \ | ||
Latest revision as of 14:45, 8 July 2009
issues with classpath
Got a problem when building classpath: Invalid flag -1.5 Solution found here
a Know bug when building java. |here
Java on the stick
I successfully built and executed JamVM and Classpath, see Creating boot image. However, running a small Java program that used AWT failed with the following exception trace:
po@gumstix-custom-verdex:~/proto$ java ShowMe java.awt.AWTError: Cannot load AWT toolkit: gnu.java.awt.peer.gtk.GtkToolkit at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:607) at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:103) at java.awt.Window.<init>(Window.java:133) at java.awt.Frame.<init>(Frame.java:246) at ShowMe.main(ShowMe.java:35) Caused by: java.lang.UnsatisfiedLinkError: Native library `gtkpeer' not found (as file `libgtkpeer.so') in gnu.classpath.boot.library.path and java.library.path at java.lang.Runtime.loadLibrary(Runtime.java:763) at java.lang.System.loadLibrary(System.java:662) at gnu.java.awt.peer.gtk.GtkToolkit.<clinit>(GtkToolkit.java:173) at java.lang.VMClass.forName(Native Method) at java.lang.Class.forName(Class.java:233) at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:583) ...4 more
This was (once I understood the classpath recipe) easily fixed by making sure that my image recipe had lines for installing both classpath and classpath-awt, like so:
classpath \ classpath-awt \
adding support for serial port using RXTX was done by adding the following lines:
librxtx-jni \ librxtx-java \
