Java SE (Java Platform, Standard Edition)

Every time I click on the More button, the TextField doesnt show up.

It like, the panel is not refreshed?

/****************************************************************/
/*                      Hello	                            */
/*                                                              */
/****************************************************************/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/**
 * Summary description for Hello
 *
 */
public class Hello extends JFrame
{
	// Variables declaration
	private JScrollPane jScrollPane1;
	private JButton More;
	private JPanel contentPane;
	//-----
	private JTextField ValueTextField;
	private JComboBox LabelComboBox;
	private JComboBox ValueComboBox;
	private JPanel jPanel1;
	private int ypos = 30;
	private String[] str1 = {"1", "2", "3"};
	private String[] str2 = {"a", "b", "c"};
	//-----
	// End of variables declaration


	public Hello()
	{
		super();
		initializeComponent();

		this.setVisible(true);
	}

	private void initializeComponent()
	{
		jScrollPane1 = new JScrollPane();
		More = new JButton();
		contentPane = (JPanel)this.getContentPane();
		//-----
		ValueTextField = new JTextField();
		LabelComboBox = new JComboBox(str1);
		ValueComboBox = new JComboBox(str2);
		jPanel1 = new JPanel();
		//-----

		//
		// jScrollPane1
		//
		jScrollPane1.setViewportView(jPanel1);
		//
		// More
		//
		More.setText("More");
		More.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				More_actionPerformed(e);
			}

		});
		//
		// contentPane
		//
		contentPane.setLayout(null);
		addComponent(contentPane, jScrollPane1, 69,21,441,198);
		addComponent(contentPane, More, 210,228,83,28);
		//
		// ValueTextField
		//
		ValueTextField.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				ValueTextField_actionPerformed(e);
			}

		});
		//
		// LabelComboBox

		LabelComboBox.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				LabelComboBox_actionPerformed(e);
			}

		});
		//
		// ValueComboBox

		ValueComboBox.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				ValueComboBox_actionPerformed(e);
			}

		});
		//
		// jPanel1
		//
		jPanel1.setLayout(null);
		jPanel1.setPreferredSize(new Dimension(422, 600));
		addComponent(jPanel1, ValueTextField, 288,ypos,100,22);
		addComponent(jPanel1, LabelComboBox, 24,ypos,100,22);
		addComponent(jPanel1, ValueComboBox, 155,ypos,100,22);

		this.setTitle("Hello - extends JFrame");
		this.setLocation(new Point(0, 0));
		this.setSize(new Dimension(646, 430));
	}

	private void addComponent(Container container,Component c,int x,int y,int width,int height)
	{
		c.setBounds(x,y,width,height);
		container.add(c);
	}

	private void More_actionPerformed(ActionEvent e)
	{
		System.out.println("\nMore_actionPerformed(ActionEvent e) called.");
		
		ypos = ypos + 30;
		
		ValueTextField.revalidate();
		LabelComboBox.revalidate();
		ValueComboBox.revalidate();
		
		LabelComboBox.setEnabled(false); 
		
		ValueTextField = new JTextField();
		LabelComboBox = new JComboBox(str1);
		ValueComboBox = new JComboBox(str2);
		
		ValueTextField.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				ValueTextField_actionPerformed(e);
			}

		});
		
		LabelComboBox.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				LabelComboBox_actionPerformed(e);
			}

		});
		
		ValueComboBox.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				ValueComboBox_actionPerformed(e);
			}

		});
		
		addComponent(jPanel1, ValueTextField, 288,ypos,100,22);
		addComponent(jPanel1, LabelComboBox, 24,ypos,100,22);
		addComponent(jPanel1, ValueComboBox, 155,ypos,100,22);
		
		jPanel1.revalidate();


	}

	private void ValueTextField_actionPerformed(ActionEvent e)
	{
		System.out.println("\nValueTextField_actionPerformed(ActionEvent e) called.");

	}

	private void LabelComboBox_actionPerformed(ActionEvent e)
	{
		System.out.println("\nLabelComboBox_actionPerformed(ActionEvent e) called.");
		
		Object o = LabelComboBox.getSelectedItem();
		System.out.println(">>" + ((o==null)? "null" : o.toString()) + " is selected.");
		
	}

	private void ValueComboBox_actionPerformed(ActionEvent e)
	{
		System.out.println("\nValueComboBox_actionPerformed(ActionEvent e) called.");
		
		Object o = ValueComboBox.getSelectedItem();
		System.out.println(">>" + ((o==null)? "null" : o.toString()) + " is selected.");
		
	}

 

//============================= Testing ================================//
//=                                                                    =//
//= The following main method is just for testing this class you built.=//
//= After testing,you may simply delete it.                            =//
//======================================================================//
	public static void main(String[] args)
	{
		JFrame.setDefaultLookAndFeelDecorated(true);
		JDialog.setDefaultLookAndFeelDecorated(true);
		try
		{
			UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
		}
		catch (Exception ex)
		{
			System.out.println("Failed loading L&F: ");
			System.out.println(ex);
		}
		new Hello();
	}
//= End of Testing =
}

Message was edited by:
Shaodw_boi