¿La mejor manera de obtener sonido en el botón de presión para una calculadora de Java?

Soy un estudiante de Java que está aprendiendo y estoy trabajando en un proyecto independiente para mi currículum. Decidí hacer una calculadora Java porque conozco la mayoría de los componentes que la componen. Una cosa que no sé hacer es agregar sonido al presionar el botón. Tengo una vaga idea de lo que pasa con las cosas de entrada de Audiostream. Pero necesito sonidos únicos para cada botón en mi calculadora. En este momento, mi calculadora no está completamente terminada (los oyentes aún no funcionan). Me preguntaba cuál sería la mejor manera de incorporar mis archivos .wav en las pulsaciones de los botones. Gracias por adelantado.

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

public class Calculator {

    //instance variables
    JFrame frame;
    JPanel mainPanel, northPanel, southPanel;
    JTextField numberLabel;
    JButton backspace, multiply, divide, add, subtract, equal; //four function buttons
    JButton one, two, three, four, five, six, seven, eight, nine, zero; //number buttons
    JButton posOrNeg, decimal, leftParenthese, rightParenthese;

    //constructor
    public Calculator()
    {
        //create it
        frame = new JFrame();
        mainPanel = new JPanel(); //contains both panels
        mainPanel.setForeground(Color.BLACK);
        mainPanel.setBackground(Color.DARK_GRAY);
        northPanel = new JPanel(new BorderLayout()); //contains the number label in border layout
        southPanel = new JPanel(new GridLayout(5, 4)); //contains the buttons in border layout
        numberLabel = new JTextField(37); //*************************
        backspace = new JButton();
        backspace.setForeground(Color.WHITE);
        backspace.setBackground(Color.GRAY);
        multiply = new JButton();
        multiply.setForeground(Color.WHITE);
        multiply.setBackground(Color.MAGENTA);
        divide = new JButton();
        divide.setForeground(Color.WHITE);
        divide.setBackground(Color.PINK);
        add = new JButton();
        add.setForeground(Color.WHITE);
        add.setBackground(Color.BLUE);
        subtract = new JButton();
        subtract.setForeground(Color.WHITE);
        subtract.setBackground(Color.RED);
        equal = new JButton();
        equal.setForeground(Color.WHITE);
        equal.setBackground(Color.ORANGE);
        zero = new JButton();
        zero.setForeground(Color.DARK_GRAY);
        zero.setBackground(Color.GREEN);
        one = new JButton();
        one.setForeground(Color.DARK_GRAY);
        one.setBackground(Color.GREEN);
        two = new JButton();
        two.setForeground(Color.DARK_GRAY);
        two.setBackground(Color.GREEN);
        three = new JButton();
        three.setForeground(Color.DARK_GRAY);
        three.setBackground(Color.GREEN);
        four = new JButton();
        four.setForeground(Color.DARK_GRAY);
        four.setBackground(Color.GREEN);
        five = new JButton();
        five.setForeground(Color.DARK_GRAY);
        five.setBackground(Color.GREEN);
        six = new JButton();
        six.setForeground(Color.DARK_GRAY);
        six.setBackground(Color.GREEN);
        seven = new JButton();
        seven.setForeground(Color.DARK_GRAY);
        seven.setBackground(Color.GREEN);
        eight = new JButton();
        eight.setForeground(Color.DARK_GRAY);
        eight.setBackground(Color.GREEN);
        nine = new JButton();
        nine.setForeground(Color.DARK_GRAY);
        nine.setBackground(Color.GREEN);
        posOrNeg = new JButton();
        posOrNeg.setForeground(Color.WHITE);
        posOrNeg.setBackground(Color.LIGHT_GRAY);
        decimal = new JButton();
        decimal.setForeground(Color.WHITE);
        decimal.setBackground(Color.CYAN);
        leftParenthese = new JButton();

        rightParenthese = new JButton();

        //configure it
        frame.setTitle("My Calculator");
        frame.setSize(450, 225);
        frame.setLocation(200, 200);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);

        //buttons
        backspace.setText("Back Space");
        leftParenthese.setText("(");
        rightParenthese.setText(")");
        multiply.setText("x");
        divide.setText("/");
        add.setText("+");
        subtract.setText("-");
        equal.setText("=");
        zero.setText("0");
        one.setText("1");
        two.setText("2");
        three.setText("3");
        four.setText("4");
        five.setText("5");
        six.setText("6");
        seven.setText("7");
        eight.setText("8");
        nine.setText("9");
        posOrNeg.setText("+/-");
        decimal.setText(".");

        //add it
        northPanel.add(numberLabel, BorderLayout.NORTH);
        southPanel.add(backspace);
        southPanel.add(leftParenthese);
        southPanel.add(rightParenthese);
        southPanel.add(multiply);
        southPanel.add(seven);
        southPanel.add(eight);
        southPanel.add(nine);
        southPanel.add(divide);
        southPanel.add(four);
        southPanel.add(five);
        southPanel.add(six);
        southPanel.add(add);
        southPanel.add(one);
        southPanel.add(two);
        southPanel.add(three);
        southPanel.add(subtract);
        southPanel.add(zero);
        southPanel.add(decimal);
        southPanel.add(posOrNeg);
        southPanel.add(equal);
        mainPanel.add(northPanel, BorderLayout.NORTH);
        mainPanel.add(southPanel, BorderLayout.SOUTH);
        frame.add(mainPanel);

        //add listener
        one.addActionListener(new ButtonListener());
        two.addActionListener(new ButtonListener());
        three.addActionListener(new ButtonListener());
        four.addActionListener(new ButtonListener());
        five.addActionListener(new ButtonListener());
        six.addActionListener(new ButtonListener());
        seven.addActionListener(new ButtonListener());
        eight.addActionListener(new ButtonListener());
        nine.addActionListener(new ButtonListener());
        zero.addActionListener(new ButtonListener());
        multiply.addActionListener(new ButtonListener());
        divide.addActionListener(new ButtonListener());
        add.addActionListener(new ButtonListener());
        subtract.addActionListener(new ButtonListener());
        equal.addActionListener(new ButtonListener());
        posOrNeg.addActionListener(new ButtonListener());
        decimal.addActionListener(new ButtonListener());
        backspace.addActionListener(new ButtonListener());
        leftParenthese.addActionListener(new ButtonListener());
        rightParenthese.addActionListener(new ButtonListener());

    }

    //define action listener
    class ButtonListener implements ActionListener
    {
        public void actionPerformed(ActionEvent e)
        {
            if(e.getSource() == one)
            {

            }
            if(e.getSource() == two)
            {

            }
            if(e.getSource() == three)
            {

            }
            if(e.getSource() == four)
            {

            }
            if(e.getSource() == five)
            {

            }
            if(e.getSource() == six)
            {

            }
            if(e.getSource() == seven)
            {

            }
            if(e.getSource() == eight)
            {

            }
            if(e.getSource() == nine)
            {

            }
            if(e.getSource() == zero)
            {

            }
            if(e.getSource() == multiply)
            {

            }
            if(e.getSource() == divide)
            {

            }
            if(e.getSource() == add)
            {

            }
            if(e.getSource() == subtract)
            {

            }
            if(e.getSource() == equal)
            {

            }
            if(e.getSource() == posOrNeg)
            {

            }
            if(e.getSource() == decimal)
            {

            }
            if(e.getSource() == backspace)
            {

            }
            if(e.getSource() == leftParenthese)
            {

            }
            if(e.getSource() == rightParenthese)
            {

            }
        }
    }    
}

Respuestas a la pregunta(3)

Su respuesta a la pregunta