/**
 * LoopEx
 *
 * This program demonstrates if/else 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 LoopEx {

 	public static void main(String[] args) {

		/** DON'T BE CONCERNED WITH THIS SECTION **/
		JFrame frame = new JFrame( "Loop 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( "Loop Statement\n\n" +
								  "String message = \"\"; 	//initialize variable\n\n" +
								  "int i = 0;\n\n" +
								  "// guaranteed to execute at least once\n\n" +
								  "do {\n\n" +
								  "  message += \"This is the \" + (i+1) + \"x around the loop\\n\";\n\n" +
								  "  i++;\n\n" +
								  "} while( i <= 10 );\n\n" +
								  "tA.setText( message );\n\n" +
								  "JOptionPane.showMessageDialog( frame, \"Check it out! I just looped \" + i + \" " +
								  "times!\", \"Loop Example\", JOptionPane.INFORMATION_MESSAGE );\n\n" +
								  "for(int j = 5; j >= 0; j--) {\n\n" +
								  "  message += \"Now I gonna backwards. The counter is at \" + j + \"\\n\";\n\n" +
								  "}\n\n" +
								  "tA.setText( message );" );
			}
		});

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

		testLoop( frame, textArea );
	}

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

		JOptionPane.showMessageDialog( frame, "I'm about to loop like crazy!", "Loop Example", JOptionPane.INFORMATION_MESSAGE );

		/***** THIS IS THE SECTION OF INTEREST *****/
		String message = ""; 	//initialize variable
		int i = 0;

		// guaranteed to execute at least once
		do {

			message += "This is the " + (i+1) + "x around the loop\n";
			i++;

		} while( i <= 10 );

		tA.setText( message );

		JOptionPane.showMessageDialog( frame, "Check it out! I just looped " + i + " times!", "Loop Example", JOptionPane.INFORMATION_MESSAGE );

		for(int j = 5; j >= 0; j--) {
			message += "Now I gonna backwards. The counter is at " + j + "\n";
		}

		tA.setText( message );
	}

}