GUI Practice, now a problem.

Howdy, I am working on my GUI skills, seeming how they are lacking and decided to make a project to get them better. The objective of my code is to allow the user to select from 1 of four patterns, and the user could input any character and that would be what the pattern would consist of. However, nothing seems to have gone right, and I would appreciate the help.

p.s - I know the patterns are the same, I just left them the same to test, and it wouldn't work.

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

public class PracticeProgram extends JFrame
{
	//Declare your variables
	private JLabel pattern_one, pattern_two, pattern_three, pattern_four;
	private JTextField character_input, triangle_output;
	private JButton p_1, p_2, p_3, p_4, clear;
	private PatternOneHandler p1Handler;
	private PatternTwoHandler p2Handler;
	private PatternThreeHandler p3Handler;
	private PatternFourHandler p4Handler;
	/*private RandomButtonHandler rbHandler;*/
	private ClearButtonHandler cbHandler;
	/*private ExitButtonHandler ebHandler;*/
	private static final int WIDTH = 800;
	private static final int HEIGHT = 800;
	
	public PracticeProgram()
	{
	
	// Labels
		pattern_one = new JLabel("Pattern One", SwingConstants.CENTER);
		pattern_two = new JLabel("Pattern Two", SwingConstants.CENTER);
		pattern_three = new JLabel("Pattern Four", SwingConstants.CENTER);
		pattern_four = new JLabel("Pattern Five", SwingConstants.CENTER);
		
	// TextFields
		character_input = new JTextField(1);
		trianle_output = new JTextField(100);
		
	// Buttons
		p_1 = new JButton("1");
		p_2 = new JButton("2");
		p_3 = new JButton("3");
		p_4 = new JButton("4");
		/*random = new JButton("Random");*/
		clear = new JButton("Clear");
		/*exit = new JButton("exit");*/
		
	// Handlers
		p1Handler = PatternOneHandler();
		p2Handler = PatternTwoHandler();
		p3Handler = PatternThreeHandler();
		p4Handler = PatternFourHandler();
		/*rbHandler = RandomButtonHandler();*/
		cbHandler = ClearButtonHandler();
		/*ebHandler = ExitButtonHandler();*/
		
	// ActionListeners
		p_1.addActionListener(p1Handler);
		p_2.addActionListener(p2Handler);
		p_3.addActionListener(p3Handler);
		p_4.addActionListener(p4Handler);
		/*random.addActionListener(rbHandler);*/
		clear.addActionListener(cbHandler);
		/*exit.addActionListener(ebHandler);*/
		
	// Set Title
		setTitle("Review");
		
	//Container
		Container pane = getContentPane();
		
	//Layout
		pane.setLayout(new GridLayout(2, 7));
		
	//Add to your container
		pane.add(pattern_one);
		pane.add(p_1);
		pane.add(pattern_two);
		pane.add(p_2);
		pane.add(pattern_three);
		pane.add(p_3);
		pane.add(pattern_four);
		pane.add(p_4);
		/*pane.add(random);*/
		pane.add(clear);
		/*pane.add(exit);*/
		
	//Set Size
		setSize(WIDTH, HEIGHT);
		
	//Make Visible
		setVisible(true);
		
	//Default close operation
		setDefaultCloseOperation(EXIT_ON_CLOSE);
	}
	
	private class p1Handler implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			char symbol = character_input.getText().charAt(0);
			for(int row = 0; row < 10; row++)
			{
				for(int col = 0; col <= row; col++)
				{
				triangle_output.setText("" + symbol);
				}
			triangle_output.append("\n");
			}
		}
	}
	
	private class p2Handler implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			char symbol = character_input.getText().charAt(0);
			for(int row = 0; row < 10; row++)
			{
				for(int col = 0; col <= row; col++)
				{
				triangle_output.setText("" + symbol);
				}
			triangle_output.append("\n");
			}
		}
	}
	
	private class p3Handler implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			char symbol = character_input.getText().charAt(0);
			for(int row = 0; row < 10; row++)
			{
				for(int col = 0; col <= row; col++)
				{
				triangle_output.setText("" + symbol);
				}
			triangle_output.append("\n");
			}
		}
	}
	
	private class p4Handler implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			char symbol = character_input.getText().charAt(0);
			for(int row = 0; row < 10; row++)
			{
				for(int col = 0; col <= row; col++)
				{
				triangle_output.setText("" + symbol);
				}
			triangle_output.append("\n");
			}
		}
	}
	
	/*private class rbHandler implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
		
		}
	}*/
	
	private class cbHandler implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			triangle_output.setText("");
		}
	}
	
	/*private class ebHandler implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			
		}
	}*/
	
	public static void main(String[] args)
	{
		PracticeProgram practProgram = new PracticeProgram();
	}
}