static {
/* ensure that the necessary native libraries are loaded */
Toolkit.loadLibraries();
if (!GraphicsEnvironment.isHeadless()) {
initIDs();
}
}
/**
* Constructs a Checkbox with the specified label, set to the specified state, and in the
* specified check box group.
*
* @param label a string label for this check box, or <code>null</code> for no label.
* @param state the initial state of this check box.
* @param group a check box group for this check box, or <code>null</code> for no group.
* @exception HeadlessException if <code>GraphicsEnvironment.isHeadless</code> returns <code>true
* </code>
* @see j86.java.awt.GraphicsEnvironment#isHeadless
* @since JDK1.1
*/
public Checkbox(String label, boolean state, CheckboxGroup group) throws HeadlessException {
GraphicsEnvironment.checkHeadless();
this.label = label;
this.state = state;
this.group = group;
if (state && (group != null)) {
group.setSelectedCheckbox(this);
}
}
/**
* Reads the <code>ObjectInputStream</code> and if it isn't <code>null</code> adds a listener to
* receive item events fired by the <code>Checkbox</code>. Unrecognized keys or values will be
* ignored.
*
* @param s the <code>ObjectInputStream</code> to read
* @exception HeadlessException if <code>GraphicsEnvironment.isHeadless</code> returns <code>true
* </code>
* @serial
* @see #removeItemListener(ItemListener)
* @see #addItemListener(ItemListener)
* @see j86.java.awt.GraphicsEnvironment#isHeadless
* @see #writeObject(ObjectOutputStream)
*/
private void readObject(ObjectInputStream s)
throws ClassNotFoundException, IOException, HeadlessException {
GraphicsEnvironment.checkHeadless();
s.defaultReadObject();
Object keyOrNull;
while (null != (keyOrNull = s.readObject())) {
String key = ((String) keyOrNull).intern();
if (itemListenerK == key) addItemListener((ItemListener) (s.readObject()));
else // skip value for unrecognized key
s.readObject();
}
}
