URL: https://linuxfr.org/forums/programmation-java/posts/gcjgij-awt
Title: GCJ/GIJ + AWT
Authors: j
Date: 2005年09月27日T21:44:18+02:00
Tags: debian
Score: 0
C'est la première fois que j'essaye d'utiliser gcj/gij et je connais très peu java. 
 
Voici un petit code source tiré de LinuxJournal : 
 
`import java.awt.*; 
import java.awt.event.*; 
 
public class ExampleAWT extends Frame { 
ExampleAWT() { 
super("AWT"); 
 
Label msgLabel = new Label("Quit?"); 
Button yesButton = new Button("Yes"); 
Button noButton = new Button("No"); 
 
Panel buttonbox = new Panel(); 
buttonbox.setLayout(new FlowLayout()); 
buttonbox.add(yesButton); 
buttonbox.add(noButton); 
 
Panel msgbox = new Panel(); 
msgbox.setLayout(new FlowLayout()); 
msgbox.add(msgLabel); 
 
add(msgbox, BorderLayout.NORTH); 
add(buttonbox, BorderLayout.SOUTH); 
 
yesButton.addActionListener(new ActionListener() { 
public void actionPerformed(ActionEvent e) { System.exit(0); } 
}); 
 
noButton.addActionListener(new ActionListener() { 
public void actionPerformed(ActionEvent e) { System.exit(1); } 
}); 
 
addWindowListener(new WindowAdapter() { 
public void windowClosing(WindowEvent e) { 
System.exit(0); 
} 
}); 
} 
 
public static void main(String[] args) { 
ExampleAWT frame = new ExampleAWT(); 
frame.pack(); 
frame.setVisible(true); 
} 
}` 
 
Le programme se compile bien à priori : 
 
gcj -C ExampleAWT.java me fabrique un ExampleAWT.class mais quand je le passe à GIJ, ce dernier apprécie peu : 
 
jerome@glop:~/prog$ gij ExampleAWT 
Exception in thread "main" java.awt.AWTError: Cannot load AWT toolkit: gnu.awt.gtk.GtkToolkit not found in [file:./, core:/] 
at java.awt.Toolkit.getDefaultToolkit() (/usr/lib/libgcj.so.4.0.0) 
at java.awt.Component.getToolkit() (/usr/lib/libgcj.so.4.0.0) 
at java.awt.Container.addImpl(java.awt.Component, java.lang.Object, int) (/usr/lib/libgcj.so.4.0.0) 
at java.awt.Container.add(java.awt.Component) (/usr/lib/libgcj.so.4.0.0) 
at ExampleAWT.ExampleAWT() (Unknown Source) 
at ExampleAWT.main(java.lang.String[]) (Unknown Source) 
 
Idem pour la compilation en natif : 
 
jerome@glop:~/prog$ gcj --main=ExampleAWT -o ExampleAWT ExampleAWT.java 
jerome@glop:~/prog$ ./ExampleAWT 
Exception in thread "main" java.awt.AWTError: Cannot load AWT toolkit: gnu.awt.gtk.GtkToolkit not found in [file:./, core:/] 
at java.awt.Toolkit.getDefaultToolkit() (/usr/lib/libgcj.so.4.0.0) 
at java.awt.Component.getToolkit() (/usr/lib/libgcj.so.4.0.0) 
at java.awt.Container.addImpl(java.awt.Component, java.lang.Object, int) (/usr/lib/libgcj.so.4.0.0) 
at java.awt.Container.add(java.awt.Component) (/usr/lib/libgcj.so.4.0.0) 
at ExampleAWT.ExampleAWT() (Unknown Source) 
at ExampleAWT.main(java.lang.String[]) (Unknown Source) 
 
libgcj4-awt est installé. Manque t il quelque chose ? GIJ se définit comme un interpréteur ; peut on le considérer comme l'équivalent de la machine virtuelle java ? GIJ peut il executer certaines applets que l'on rencontre sur le web ? 
 
jerome@glop:~/prog$ java -version 
gij (GNU libgcj) version 3.3.5 (Debian 1:3.3.5-13) 
 
Copyright (C) 2002 Free Software Foundation, Inc. 
This is free software; see the source for copying conditions. There is NO 
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
 
Et, spécial Debian : 
 
jerome@glop:~/prog$ dpkg -S /usr/bin/java 
dpkg : /usr/bin/java introuvable. 
 
Merci pour vos réponses.
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="httpS://linuxfr.org/forums/programmation-java/posts/gcjgij-awt.md">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="httpS://linuxfr.org/forums/programmation-java/posts/gcjgij-awt.md" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>