[hardwired]

Code:

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

public class KL4 extends JFrame 
{
//    private JButton one, two, three;
    private JTextArea results;
    Random generator = new Random();

    int userChoice;
    int compChoice;

    public KL4() 
    {
        super("GAME");
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        setSize(350,550);
//        setVisible(true);

//        Random generator = new Random();

        JButton one = new JButton("Rock");
        JButton two = new JButton("Paper");
        JButton three = new JButton("Scissors");
        results = new JTextArea(6,20);

        Container content = getContentPane();
        content.setLayout (new BorderLayout());
        JPanel panel = new JPanel(new FlowLayout());
        panel.add(one);
        panel.add(two);
        panel.add(three);
        content.add(panel, BorderLayout.NORTH);
        content.add(new JScrollPane(results), BorderLayout.CENTER);

        one.setActionCommand("rock");
        two.setActionCommand("paper");
        three.setActionCommand("scissors");

        one.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                userChoice = 1;
                results.append("Rock\n");
                compChoice = pickNum();
                results.append(getString(compChoice) + "\n");
                results.append("results = " +
                                getResults(userChoice, compChoice) +
                               "\n--------\n");
            }
        });

        two.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                userChoice = 2;
                results.append("Paper\n");
                compChoice = pickNum();
                results.append(getString(compChoice) + "\n");
                results.append("results = " +
                                getResults(userChoice, compChoice) +
                               "\n--------\n");
            }
        });

        three.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                userChoice = 3;
                results.append("Scissors\n");
                compChoice = pickNum();
                results.append(getString(compChoice) + "\n");
                results.append("results = " +
                                getResults(userChoice, compChoice) +
                               "\n--------\n");
            }
        });

        // The interface itself does not display the given
        // buttons unless you resize the screen.
        // If you add components after the top-level container is
        // realized it has no idea that you changed things. You
        // must tell it to do a new layout.
        // To avoid this always make this the last call:
        setVisible(true);
    }

    public int pickNum()
    {
        return 1 + generator.nextInt(3);
    }

    private String getString(int n)
    {
        switch(n)
        {
            case 1: return "Rock";
            case 2: return "Paper";
            case 3: return "Scissors";
            default: return "";
        }
    }

    public static void main(String[] args)
    {
        new KL4();
    }

    public String getResults(int player, int computer)
    {
        String results;
        if(player == 1)
        {
            if(computer == 2)
                results = "computer wins";
            else if(computer == 3)
                results = "player wins";
            else
                results = "tie";
        }
        else if(player == 2)
        {
            if(computer == 1)
                results = "player wins";
            else if(computer == 3)
                results = "computer wins";
            else
                results = "tie";
        }
        else
        {                   // player == 3
            if(computer == 1)
                results = "computer wins";
            else if(computer == 2)
                results = "player wins";
            else
                results = "tie";
        }
        return results;
    }
}