// Phone.java // Program creates a GUI that resembles a phone with functionality

Question

// Phone.java // Program creates a GUI that resembles a phone with functionality. import java.awt.BorderLayout; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextArea; public class Phone extends JFrame { private Jbutton keyJButton[]; private JPanel keyJPanel; private JPanel lcdJPanel; private JTextArea lcdJTextArea; private String lcdOutput = ""; private int count; // constructor sets up GUI public Phone() { super( "Phone" ); lcdJTextArea = new JTextArea( 4, 15 ); lcdJTextArea.setEditable( false ); lcdJPanel.add( lcdJTextArea ); keyJButton = new Jbutton[ 15 ]; // initialize all digit key Buttons for ( int i = 3; i <= 11; i++ ) keyJButton[ i ] = new Jbutton( String.valueOf( i - 2 ) ); // initialize all non-digit key Buttons keyJButton[ 0 ] = new Jbutton( "Send" ); keyJButton[ 1 ] = new Jbutton( "clr" ); keyJButton[ 2 ] = new Jbutton( "End" ); keyJButton[ 12 ] = new Jbutton( "*" ); keyJButton[ 13 ] = new Jbutton( "0" ); keyJButton[ 14 ] = new Jbutton( "#" ); keyJButton[ 0 ].addActionListener( public void actionPerformed( ActionEvent e ) { lcdOutput = "Calling... " + lcdOutput; lcdJTextArea.setText( lcdOutput ); } // end method actionPerformed } // end new ActionListener ) // end addActionListener call keyJButton[ 1 ].addActionListener( new ActionListener() { public void actionPerformed( ActionEvent e ) { if ( lcdOutput.length() == 0 || lcdOutput.substring( 0, 1 ).equals( "C" ) ) return; else { lcdOutput = lcdOutput.substring( 0, ( lcdOutput.length() - 1 ) ); lcdJTextArea.setText( lcdOutput ); } // end else } // end method actionPerformed } // end object ActionLstener ); // end addActionListener call keyJButton[ 2 ].addActionListener( new ActionListener() { public void actionPerformed( ActionEvent e ) { lcdJTextArea.setText( " " ); lcdOutput = ""; } // end method actionPerformed } // end new ActionListener ); // end ActionListener call for ( int i = 3; i <= 14; i++ ) { keyJButton[ i ].addActionListener( new ActionListener() { public void actionPerformed( ActionEvent e ) { lcdOutput += e.getActionCommand(); if ( lcdOutput.substring( 0, 1 ).equals( "C" ) ) return; lcdJTextArea.append( e.getActionCommand() ); } // end method actionPerformed } // end new ActionListener ); // end addActionListener call } // end for loop // set keyJPanel layout to grid layout keyJPanel = new JPanel(); keyJPanel.setLayout( new GridLayout( 5, 3 ) ); // add buttons to keyJPanel for ( int i = 0; i <= 14; i++ ) keyJPanel.add( keyJButton[ i ] ); // add components to container add( lcdOutput, BorderLayout.NORTH ); } // end Phone constructor } // end class Phone // PhoneTest.java // Program creates a GUI that resembles a phone with functionality. import javax.swing.JFrame; public class PhoneTest { // execute application public static void main( String args[] ) { Phone application = new Phone(); application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); application.setSize( 200, 300 ); application.setVisible( true ); } // end main } // end class PhoneTest The program shown in Table 1 does not compile. Fix all the syntax errors

Explanation / Answer

It should not be Jbutton. Rename it as JButton. everything works fine

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