רישום תכנית לדוגמה - עצמות חשופות
יחידה זו מכילה רישום מלא של תכנית העצמות החשופות. התייחס ליחידות קודמות לשם תיאור תפעולי של התכנית .
/*File Event25.java Copyright 1997, R.G.Baldwin
This program is designed to be compiled and run under JDK 1.1
This is a bare-bones program that illustrates Program Generated
Events under JDK 1.1.
The output from the program is:
Copyright 1997, R.G.Baldwin
actionPerformed() method invoked on NonVisualObject
The program was tested using JDK 1.1 running under Win95.
*/
//=======================================================================
import java.awt.*;
import java.awt.event.*;
//=======================================================================
public class Event25 {
public static void main(String[] args){
new Event25();//instantiate an object of this type
}//end main
//-------------------------------------------------------------------------
public Event25(){//constructor
System.out.println("Copyright 1997, R.G.Baldwin");
NonVisual nonVisualObject = new NonVisual("NonVisualObject");
nonVisualObject.makeActionListenerList(new AnActionListenerClass());
nonVisualObject.generateActionEvent();
}//end constructor
}//end class Event25
//========================================================================
//Class to respond to action events
class AnActionListenerClass implements ActionListener{
public void actionPerformed(ActionEvent e){
System.out.println(
"actionPerformed() method invoked on " + e.getActionCommand());
}//end actionPerformed
}//end class AnActionListenerClass
//========================================================================
//Class to create object capable of generating Action events.
//-------------------------------------------------------------------------
class NonVisual extends Component {
String ID; // The ID of the object
ActionListener actionListener;//list of registered action listener objects
//-----------------------------------------------------------------------
public NonVisual(String ID) {//Constructs a NonVisual object
this.ID = ID;
}//end constructor
//-----------------------------------------------------------------------
public void makeActionListenerList(ActionListener listener) {
actionListener = AWTEventMulticaster.add(actionListener, listener);
}//end makeActionListenerList()
//-----------------------------------------------------------------------
public void generateActionEvent() {
actionListener.actionPerformed(
new ActionEvent(this, ActionEvent.ACTION_PERFORMED, ID));
}//end generateActionEvent
}//end class NonVisual |
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