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90 lines
3.3 KiB
Plaintext
90 lines
3.3 KiB
Plaintext
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This directory contains example programs that show how the GNU Classpath
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library can be used.
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Each example has its own package under gnu.classpath.examples and has a
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class Demo which contains a main() method to run that particular example.
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The examples can be compiled and run with gcj as follows:
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gcj -o swingdemo --main=gnu.classpath.examples.swing.Demo \
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gnu/classpath/examples/swing/Demo.java \
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gnu/classpath/examples/swing/GNULookAndFeel.java
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./swingdemo
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Or with a traditional byte code interpreter like:
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gcj -C gnu/classpath/examples/awt/Demo.java
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gij gnu.classpath.examples.awt.Demo
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The installation also comes with an examples.zip archive that contains
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all needed resources and compiled byte code class files that can be
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run as follows:
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kaffe -classpath examples.zip gnu.classpath.examples.awt.Demo
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kaffe -classpath examples.zip gnu.classpath.examples.swing.Demo
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The jawt Demo needs some extra support library that currently needs to be
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build by hand. The following assumes GNU Classpath was installed in
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/usr/local/classpath, if you installed it somewhere else then adjust the
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-I and -L paths accordingly. The included Makefile.jawt is setup this way.
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You can invoke it with:
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make -f Makefile.jawt
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Or you can compile by hand as follows:
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gcj -C gnu/classpath/examples/jawt/DemoJAWT.java
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gcjh -jni gnu.classpath.examples.jawt.DemoJAWT -o DemoJAWT.h
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gcc -g -O0 -Wall -I. -I/usr/X11R6/include -L. -L/usr/X11R6/lib \
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-I/usr/local/classpath/include -L/usr/local/classpath/lib/classpath \
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-lX11 -ljawtgnu -shared -o libDemoJAWT.so \
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gnu/classpath/examples/jawt/DemoJAWT.c
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You can then run the example as follows:
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export LD_LIBRARY_PATH=.:/usr/local/classpath/lib/classpath
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jamvm gnu.classpath.examples.jawt.DemoJAWT
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The java2d benchmarking demos include a GTK widget to measure the native
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speed of some basic java2d options, without the JNI overhead.
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You can invoke it with:
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make -f Makefile.java2d
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Or you can compile by hand as follows:
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gcc -g -O0 -Wall -I./gnu/classpath/examples/java2d \
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-o cairobench gnu/classpath/examples/java2d/bench.c \
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`pkg-config --libs --cflags gtk+-2.0`
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You can then run the example as follows:
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./cairobench
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All example code is distributed under the GNU General Public License (GPL).
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The example icons used in some of the examples come from gnome-icon-theme
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version 1.2.3 and are also distributed under the GPL.
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All these images are stored in the directory gnu/classpath/examples/icons/.
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More free icons can be found in the gnome-icon-theme package:
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http://ftp.gnome.org/pub/GNOME/sources/gnome-icon-theme/
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GNU Classpath examples are free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2, or (at
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your option) any later version.
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GNU Classpath examples are distributed in the hope that they will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath examples; see the file COPYING. If not,
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write to the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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