sbucareer:


sayhi2ay

Ok, you have learned that yeah, and certain that a variable declared without an identifier is automatically declared private by the JVM. Thank you sayhi2ay for that info.

Just want to share this piece of code with Java enthusiast. It is about Desktop programming. Mind you this code is not compiled or tested. It was typed directly onto the forum message editor. If it doesn't compile when you copy and paste it, you would need to debug it.



package Phone;

import javax.swing.UIManager;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
import javax.swing.text.*;

public class MobilePhoneApplication extends JPanel{

private JPanel mainPanel;
private JPanel display;
private JPanel keyPads;
private JPanel keyControls;

private JTextArea textArea;

private JButton call;
private JButton end;

private ActionListener listener;
private DocumentListener docuListen;
private Document jDocument;


public MobilePhoneApplication (ActionListener listener, DocumentListener docuListen){

try{
UIManager.setLookAndFeel
( UIManager.getSystemLookAndFeelClassName() );
}catch(Exception e ){
}//End try
this.listener = listener;
this.docuListen = docuListen;

mainPanel = new JPanel();
display = new JPanel();
keyPads = keyPads();
keyControls = new JPanel();

keyControls.setLayout ( new FlowLayout( ) );

call = new JButton( "Call";
end = new JButton ( "End" );
keyControls.add ( call );
keyControls.add ( end );

display.setLayout ( new GridLayout (1, 1));
textArea = new JTextArea();
textArea.setEditable ( false );
textArea.getDocument().addDocumentListener (docuListen);
textArea.setForeground ( new Color (255, 50 , 10 ));
textArea.setFont ( new Font ("Dialog", Font.BOLD, 24 ));
display.add ( textArea );

mainPanel.setLayout( new GridLayout(3, 1) );
mainPanel.add ( display );
mainPanel.add ( keyControls );
mainPanel.add ( keyPads );

call.setActionCommand ( "Call" );
end.setActionCommand ("End" );
call.addActionListener (listener);
end.addActionListener ( listener );

this.add( mainPanel );

}//End MobilePhoneApplication Constructor


private JPanel keyPads (){
String values[] = {"1", "ABC2", "DEF3",
"GHI4", "JKL5", "MNO6",
"PQRS7", "TUV8", "WXYZ9",
"*", "0+", "#" };
JPanel toReturn = new JPanel();
toReturn.setLayout (new GridLayout(4, 3));
JButton keys[] = new JButton[values.length];

for ( int index1 = 0; index1 < keys.length; index1++ ){
keys[index1] = new JButton ( values[index1] );
}//End for

for (int index = 0; index < values.length; index++){
//keys[index].setText( values[index] );
keys[index].setActionCommand(values[index]);
keys[index].addActionListener(this.listener);

toReturn.add(keys[index]);
}//End for

return toReturn;

}//End keyPads method

public JTextArea getTextArea (){
return textArea;
}//End getTextArea

public void show(String string ){
textArea.setText( string );
}//End show

public void defaultMenu ( boolean set){

call.setEnabled ( set );
end.setEnabled ( set );
}//End defaultMenu

//Test if the TextArea has any test
public boolean hasChar(){
jDocument = textArea.getDocument();
return ( jDocument.getLength() != 0 );
}//End hasChar

public void clear (){
String text = textArea.getText();
text = null;
textArea.setText (text );
}//End clear
}//End MobilePhoneApplication

malone5923,

Asfar as I know all the current codes above are fully debugged and fully functional. Copy and paste it in a text editor like Notepad or WordPad and save them as .java respectively and run.

javaprince:
sbu Have done has u sent.