java如何在JButton上设置文本或显示文本

Question

  import java.awt.event.ActionEvent;
  import java.awt.event.ActionListener;
  import java.io.*;
  import javax.swing.*;
  public class WordGame extends javax.swing.JFrame implements    ActionListener{
   int SkipNum = 0;
    String Get;
    int counter2;
    int score;
   static String words[] = new String[20];
   JButton Button[] = new JButton[5];
   JFrame panel = new JFrame();
   public WordGame() {
    initComponents();
    setWord();
}

public void clear(){
    jButton1.setText("");
    jButton2.setText("");
    jButton3.setText("");
    jButton4.setText("");
    jButton5.setText("");
    jButton6.setText("");
    jButton7.setText("");
    jButton8.setText("");
}

    public void setWord() {
    int index = (int)(Math.random()*20);
    StringBuffer NS = new StringBuffer(words[index]);
    String sh = "";
   Get = words[index];
    int counter = NS.length();
    while (NS.length() != 0) {
        int j = (int)(Math.random() * NS.length());
        sh += NS.charAt(j);
        NS.deleteCharAt(j);

    }
    if (counter == 5){
        for (int i = 0; i < Button.length; i++){
   for (int x = 0; x < 5;x++){
   String Letter = (String.valueOf(sh.charAt(x)));//can't display the letter
   Button[i] = new JButton(Letter);
      Button[i].setText(Letter);
    panel.add(Button[i]);

    }
    }
   jButton6.setVisible(false);
    jButton7.setVisible(false);
    jButton8.setVisible(false);
    }
   else if (counter == 6){

    jButton1.setText(String.valueOf(sh.charAt(0)));
    jButton2.setText(String.valueOf(sh.charAt(1)));
    jButton3.setText(String.valueOf(sh.charAt(2)));
    jButton4.setText(String.valueOf(sh.charAt(3)));
    jButton5.setText(String.valueOf(sh.charAt(4)));
    jButton6.setText(String.valueOf(sh.charAt(5)));
     jButton7.setVisible(false);
    jButton8.setVisible(false);
    }
   else if (counter == 7){

    jButton1.setText(String.valueOf(sh.charAt(0)));
    jButton2.setText(String.valueOf(sh.charAt(1)));
    jButton3.setText(String.valueOf(sh.charAt(2)));
    jButton4.setText(String.valueOf(sh.charAt(3)));
    jButton5.setText(String.valueOf(sh.charAt(4)));
    jButton6.setText(String.valueOf(sh.charAt(5)));
    jButton7.setText(String.valueOf(sh.charAt(6)));
     jButton8.setVisible(false);
    }
   else if (counter == 8){
    jButton1.setText(String.valueOf(sh.charAt(0)));
    jButton2.setText(String.valueOf(sh.charAt(1)));
    jButton3.setText(String.valueOf(sh.charAt(2)));
    jButton4.setText(String.valueOf(sh.charAt(3)));
    jButton5.setText(String.valueOf(sh.charAt(4)));
    jButton6.setText(String.valueOf(sh.charAt(5)));
    jButton7.setText(String.valueOf(sh.charAt(6)));
    jButton8.setText(String.valueOf(sh.charAt(7)));
    }



    jButton1.setEnabled(true);
    jButton2.setEnabled(true);
    jButton3.setEnabled(true);
    jButton4.setEnabled(true);
    jButton5.setEnabled(true);
    jButton6.setEnabled(true);
    jButton7.setEnabled(true);
    jButton8.setEnabled(true);

    jTextField1.setText("");

}

  private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    jTextField1.setText(jTextField1.getText() + jButton1.getText());
      jButton1.setEnabled(false);
}             

BufferedReader dataIn = new BufferedReader(new FileReader("words.txt"));
    int ctr = 0;
    words[ctr] = dataIn.readLine();
    while (ctr < words.length-1){
        ctr++;
        words[ctr] = dataIn.readLine();
    }                      

我正在使用BufferedReader读入一些字符，我想在JButton上显示每个字符。例如，我在文本文件上有一个5个字母的单词，我想在shuffle格式的JButton“NOTES”上显示每个单词。但我无法显示单词或文本