Thread: Handling two button events?

Hey,

I'm fairly new to programming and as a project for one of my classes I have to do a visualization of Quicksort somehow in Java (how I'm not sure yet), but I was wondering how I could handle two button listener events? I can't seem to see what I'm doing wrong.

 import javax.swing.*;
   import java.awt.event.*;
   import java.awt.*;
   import java.lang.*;
 
    public class Test
   {
      public JFrame frame;
      public JPanel buttonPanel;
      public JPanel arrayPanel;
      public JPanel bottomPanel;
      public JLabel label;
      public JTextField t1;
      public JTextField t2;
      public JTextField t3;
      public JTextField t4;
      public JTextField t5;
      public JTextField t6;
      public JTextField t7;
      public JTextField t8;
      public JButton button;
      public JButton button2;
      public int[] numbers = new int[8];
 
       public Test()
      {
         frame = new JFrame("Quicksort");
         this.buildButtonPanel();
         frame.add(buttonPanel, BorderLayout.NORTH);
         this.buildArrayPanel();
         frame.add(arrayPanel, BorderLayout.CENTER);
         this.buildBottomPanel();
         frame.add(bottomPanel, BorderLayout.SOUTH);
         frame.setSize(500,500);
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         frame.setLocationRelativeTo(null);
         frame.setVisible(true);
      }
 
       private void buildButtonPanel()
      {
         button = new JButton("Generate Numbers");
         button2 = new JButton("Quicksort Numbers");
         button.addActionListener(new ButtonListener());
         buttonPanel = new JPanel();
         buttonPanel.add(button);
         buttonPanel.add(button2); 
      }
 
       private void buildArrayPanel()
      {
         t1 = new JTextField("",2);
         t2 = new JTextField("",2);
         t3 = new JTextField("",2);
         t4 = new JTextField("",2);
         t5 = new JTextField("",2);
         t6 = new JTextField("",2);
         t7 = new JTextField("",2);
         t8 = new JTextField("",2);
         arrayPanel = new JPanel();
         arrayPanel.add(t1);
         arrayPanel.add(t2);
         arrayPanel.add(t3);
         arrayPanel.add(t4);
         arrayPanel.add(t5);
         arrayPanel.add(t6);
         arrayPanel.add(t7);
         arrayPanel.add(t8);  
      }
 
       public void buildBottomPanel()
      {
         bottomPanel = new JPanel();
         label = new JLabel("Ugh...");
         label.setPreferredSize(new Dimension(6,6));
         label.setText("Ugh...");
         bottomPanel.add(label);
      }
 
       public class ButtonListener implements ActionListener
      {
 
          public void actionPerformed(ActionEvent e)
         {
            if(e.getSource() == button)
            {
            //Variables
               int num1 = (int)(Math.random()*100);
               int num2 = (int)(Math.random()*100);
               int num3 = (int)(Math.random()*100);
               int num4 = (int)(Math.random()*100);
               int num5 = (int)(Math.random()*100);
               int num6 = (int)(Math.random()*100);
               int num7 = (int)(Math.random()*100);
               int num8 = (int)(Math.random()*100);
 
            //Show array on screen
               t1.setText(Integer.toString(num1));
               t2.setText(Integer.toString(num2));
               t3.setText(Integer.toString(num3));
               t4.setText(Integer.toString(num4));
               t5.setText(Integer.toString(num5));
               t6.setText(Integer.toString(num6));
               t7.setText(Integer.toString(num7));
               t8.setText(Integer.toString(num8));
 
            //Copy numbers into array
               numbers[0] = Integer.parseInt(t1.getText());
               numbers[1] = Integer.parseInt(t2.getText());
               numbers[2] = Integer.parseInt(t3.getText());
               numbers[3] = Integer.parseInt(t4.getText());
               numbers[4] = Integer.parseInt(t5.getText());
               numbers[5] = Integer.parseInt(t6.getText());
               numbers[6] = Integer.parseInt(t7.getText());
               numbers[7] = Integer.parseInt(t8.getText());
            }
            if(e.getSource() == button2)
            {
               quickSort(numbers, 0, 7);
               t1.setText(Integer.toString(numbers[0]));
               t2.setText(Integer.toString(numbers[1]));
               t3.setText(Integer.toString(numbers[2]));
               t4.setText(Integer.toString(numbers[3]));
               t5.setText(Integer.toString(numbers[4]));
               t6.setText(Integer.toString(numbers[5]));
               t7.setText(Integer.toString(numbers[6]));
               t8.setText(Integer.toString(numbers[7]));
            }
         }
      }
 
       public void quickSort(int array[], int start, int end)
      {
         int i = start;                          
         int k = end;                            
 
         if (end - start >= 1)                   
         {
            int pivot = array[start];       
 
            while (k > i)                   
            {
               while (array[i] <= pivot && i <= end && k > i)  
                  i++;                                    
               while (array[k] > pivot && k >= start && k >= i) 
                  k--;                                        
               if (k > i)                                       
                  swap(array, i, k);                      
            }
            swap(array, start, k);          
 
            quickSort(array, start, k - 1); 
            quickSort(array, k + 1, end);   
         }
         else           {
            return;                     
         }
      }
 
       public void swap(int array[], int index1, int index2) 
      {
         int temp = array[index1];           
         array[index1] = array[index2];      
         array[index2] = temp;               
      }
 
       public static void main(String[] args)
      {
         Test test = new Test();
      }
   }

Sorry, what problems might I run into passing values back into my GUI? I don't want to keep working this way if it is going to give me problems in the long run. Our professor didn't prepare us for this project at all, and I haven't been programming very long at all.