/**
 * SwitchStatementEx
 *
 * This program demonstrates switch structures.
 *
 * @author Brad Rippe
 */

 import javax.swing.*;
 import java.awt.*;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.ActionEvent;
 import java.awt.Container;
 import javax.swing.UIManager;

 public class SwitchStatementEx {

 	public static void main(String[] args) {

		/** DON'T BE CONCERNED WITH THIS SECTION **/
		JFrame frame = new JFrame( "Switch Demo" );

		try {
	        UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
    	} catch (Exception e) { }


    	frame.addWindowListener(new WindowAdapter() {
        	public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
	    });

		final JTextArea textArea = new JTextArea( 35, 35 );

		JScrollPane scrollPane = new JScrollPane( textArea );
		scrollPane.setPreferredSize( new Dimension( 600, 300 ) );
		frame.getContentPane().add( scrollPane, BorderLayout.CENTER );

		JButton codeButton = new JButton( "Show Code" );
		codeButton.addActionListener( new ActionListener() {
			public void actionPerformed( ActionEvent e ) {
				textArea.setFont( new Font("Courier", Font.BOLD, 16 ) );
				textArea.setText( "Switch Statement\n\n" +
								  "switch( grade ) {\n\n" +
								  "  case 'A':\n\n" +
								  "    message += \"You got an A!\\nYou're gonna get paid(???)!\";\n\n" +
								  "    //break;\n\n" +
								  "  case 'B':\n\n" +
								  "    message += \"You got a B!\\nNot bad!\";\n\n" +
								  "    break;\n\n" +
								  "  case 'C':\n\n" +
								  "    message += \"You got an C!\\nStudy a little harder!\";\n\n" +
								  "    break;\n\n" +
								  "  default:\n\n" +
								  "    message += \"You failed!\\n\";			// message string\n\n" +
								  "    if( grade == 'D' ) {\n\n" +
								  "      message += \"You need to try harder!\";\n\n" +
								  "    } else {\n\n" +
								  "      message += \"There's no hope!\";\n\n" +
								  "    }\n\n" +
								  "} // end switch\n\n" +
								  "tA.setText( message );\n\n" );
			}
		});

        frame.getContentPane().add( codeButton, BorderLayout.SOUTH );
	    frame.pack();
      	frame.setVisible(true);

		testSwitch( frame, textArea );
	}

	public static void testSwitch(JFrame frame, JTextArea tA) {

		String input = JOptionPane.showInputDialog( frame, "What was your grade on assignment 3?" );

		if( input.length() != 1 ) {
			JOptionPane.showMessageDialog( frame, "Please type one character, 'A', 'B', 'C', 'D' or 'F'!", "Incorrect Info", JOptionPane.ERROR_MESSAGE );
			return;
		}

		char grade = input.toUpperCase().charAt(0);

		/***** THIS IS THE SECTION OF INTEREST *****/
		String message;

		switch( grade ) {
			case 'A':
				message = "You got an A!\nYou're gonna get paid(???)!";
				break;
			case 'B':
				message = "You got a B!\nNot bad!";
				break;
			case 'C':
				message = "You got an C!\nStudy a little more!";
				break;
			default:

				message = "You failed!\n";			// message string

				if( grade == 'D' ) {
					message = "You need to try harder!";
				} else {
					message = "There's no hope!";
				}
		} // end switch
		tA.setText( message );
	}
}