我想做一个窗口，当你按下按钮时，它会在文本区显示不同语言的短语“我爱你”。我只是不知道如何连接按钮中的文本区域。我有三节课。我尝试了很多我可以思考的方法，我也搜索了与此相关的东西，但我找不到任何有用的

import javax.swing.JFrame;
import javax.swing.SwingUtilities;
public class MainClass {
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
        public void run()   {
                new MainFrame();
        }
    });
}
}

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class MainFrame extends JFrame  {
    private ToolBar Tulbar = new ToolBar();
    private JTextArea textArea = new JTextArea();
    public MainFrame() {
        super("This window loves you");
        setLayout(new BorderLayout());
        add(Tulbar, BorderLayout.NORTH);
        add(new JScrollPane(textArea), BorderLayout.CENTER);
        setSize(600,600);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);   
    }
}

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JTextArea;
public class ToolBar extends JPanel{
    private JButton Button1 = new JButton("Korean");
    private JButton Button2 = new JButton("Japanese");
    private JButton Button3 = new JButton("French");
    private JButton Button4 = new JButton("Italian");
    private JButton Button5 = new JButton("English");
    private JButton Button6 = new JButton("Tagalog");
    public ToolBar() {
        setLayout(new FlowLayout(FlowLayout.LEFT));
        //added buttons
        add(Button1);
        add(Button2);
        add(Button3);
        add(Button4);
        add(Button5);
        add(Button6);
    }
    public ToolBar(JTextArea frame) {
        Button1.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                frame.append("Saranghae");
            }
        });
        Button2.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                frame.append("Aishiteru");
            }
        });
        Button3.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                frame.append("Je t\'aime");
            }
        });
        Button4.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                frame.append("Ti\'amo");
            }
        });
        Button5.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                frame.append("I Love You");
            }
        });
        Button4.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                frame.append("Mahal Kita");
            }
        });
    }
}