Java: Problem mit setText () - Methode mit Knopf

Ich bin neu in java und versuche ich zu tauschen, den text auf einer Schaltfläche, die ich angelegt habe. Der code für meine main Klasse ist wie folgt:

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

public class TeamProject extends Applet implements ActionListener, MouseListener
{
char[][] charValues = new char[10][10];
Table aTable;
boolean allowUserInput = false;
Button BtnStart;
Button randomChangeBtn;
boolean guessMode;
private AudioClip[] sounds = new AudioClip[5];
private int counter = 0;
//JSObject jso;

public void init()
{
        //setup buttons
    BtnStart = new Button("add row/column");
    BtnStart.addActionListener((ActionListener)this);   //cast
    randomChangeBtn = new Button("change one value");
    randomChangeBtn.addActionListener((ActionListener)this);

            //add button
    this.add(BtnStart);

    //add image to Image objects
    Image imgO = getImage(getCodeBase(), "images/not.gif");
    Image imgX= getImage(getCodeBase(), "images/cross.gif");

            //setup table
    aTable = new Table(100, 100, 75, 55, 5, 5, imgX, imgO);

    //setBackground(Color.LIGHT_GRAY);
    super.resize(700, 700);

            //add mouse listener
    addMouseListener(this);

    //initially guessMode will be false
    guessMode = false;

            //to talk to javascript
    //jso = JSObject.getWindow(this);

    sounds[0] = getAudioClip (getCodeBase(), "images/buzzthruloud.wav");
    sounds[1] = getAudioClip (getCodeBase(), "images/inconceivable4.wav");
    sounds[2] = getAudioClip (getCodeBase(), "images/foghorn.wav");
    sounds[3] = getAudioClip (getCodeBase(), "images/waiting.wav");
    sounds[4] = getAudioClip (getCodeBase(), "images/whistldn.wav");
}

  public void paint(Graphics g)
  {
g.setColor(Color.black);
aTable.draw(g);
  }

  //Mouse listener methods
  public void mousePressed (MouseEvent e)
  {
    if(!guessMode){
  if ((allowUserInput)){
    aTable.swapSquareValue(e.getX(), e.getY());
    repaint();
  }
    }
    else{
      System.out.println("guessed row = " + e.getY() + " guessed col = " + e.getX());
      if(aTable.checkGuess(e.getX(), e.getY())){
        int n = JOptionPane.showConfirmDialog(null, "Excellent!! Would you like to progress to next level",

                                         "Correct!!!", JOptionPane.YES_NO_OPTION);

    if (n == JOpionPane.YES_OPTION) {


               }
 else{

    JOptionPane.showMessageDialog(null, "Nope", "alert", JOptionPane.INFORMATION_MESSAGE);

    sounds[counter].play();

  }



  //repaint();

}



  }



  public void mouseClicked (MouseEvent e) {}

  public void mouseEntered (MouseEvent e) {}

  public void mouseReleased (MouseEvent e) {}

  public void mouseExited (MouseEvent e) {}



  //Button action listener

public void actionPerformed(ActionEvent e)

{

    if (e.getSource() == BtnStart) {

      aTable.addRow();

      aTable.addColumn();

      BtnStart.setText("Roseindia.net");

      //this.remove(BtnStart);

      //this.add(randomChangeBtn);

      super.resize(700, 700);

      repaint();

}

else if (e.getSource() == randomChangeBtn) {

  aTable.randomChangeFunc();

  repaint();

  guessMode = true;

}



    allowUserInput = true;

    System.out.println(aTable.toString());

}



}

Ich versuche zu ändern, um text in meiner actionPerformed(ActionEvent e) - Methode. Wie ich schon sagte, ich bin neu hier, also bitte sanft. Danke 🙂