Hi, I'm new to Java and some help here would be greatly appreciated.

My homework is to create a program where you can add() numbers (and
store them internally) into an array, then sort() the numbers (from
smallest to largest), print() them - no matter sorted or not. And also
an option to search() for a specific number in the array. The methods
are easy but I want to do everything with gui. I've set up the whole
layout and now I have to add the listeners for ALL the buttons - they
are four. The problem is that I don't know how to create multiple
listeners - one for each button - since every button is doing a
different work - add, sort, print, search.

Here's my code so far:

//import java.awt.GridLayout;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JTextArea;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.border.EtchedBorder;
import javax.swing.border.TitledBorder;
import javax.swing.JTextField;

public class Frame extends JFrame
{
    private ActionListener listener;
   
    public Frame()
    {   
        createPanel();
        pack();
    }
   
    private void createPanel()
    {
   
        class ButtonListener implements ActionListener
        {
            public void actionPerformed(ActionEvent event)
            {   
                < code for one of the buttons >
            }
        }
       
        // PRINT TEXT AREA
        final JTextArea textArea = new JTextArea(7,50);
        textArea.setEditable(false);
        JScrollPane scrollPane = new JScrollPane(textArea);
       
        //Frame Creation
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setContentPane(scrollPane);
        frame.pack();
        frame.show();
       
        //Creation of panels.
        JPanel controlPanel = new JPanel();
        JPanel personalPanel= new JPanel();
        JPanel salaryPanel=new JPanel();
       
        // ARRAY MANIPULATION ELEMENTS
       
            // ADD # TO ARRAY
        final JTextField addField=new JTextField(3);
        JButton addButton=new JButton("Add # to Array");
           
            // SORT THE ARRAY
        JButton sortButton=new JButton("Sort the Array");
       
            // PRINT THE ARRAY
        JButton printButton=new JButton("Print the Array");
   
        // ARRAY SEARCH ELEMENTS
   
            // ENTER # TO SEARCH FOR
        final JTextField searchField=new JTextField(3);
   
            // FIND # IN ARRAY
        JButton findButton=new JButton("Find # in Array");
        ActionListener listener= new ButtonListener();
        findButton.addActionListener(listener); // Add listener
       
        //Array Manipulation Add
        personalPanel.setBorder(new TitledBorder(new EtchedBorder(), "Array
Manipulation"));
        personalPanel.add(addField);
        personalPanel.add(addButton);
        personalPanel.add(sortButton);
        personalPanel.add(printButton);

        //Array Search Add
        controlPanel.setBorder(new TitledBorder(new EtchedBorder(), "Array
Search"));
        controlPanel.add(searchField);
        controlPanel.add(findButton);

        getContentPane().add(personalPanel,BorderLayout.CENTER);
        getContentPane().add(controlPanel,BorderLayout.SOUTH);
    }
}

I tried to create another inner class for the second listener but it
wouldn't let me! Any suggestions?

Thanks in advance!