Question

我创建了一个按钮，它应该运行一段代码，分析用户输入文本字段的文本。代码工作正常，但是只有通过分析＆＃39;才能使代码工作。按钮，相反，当按下重置按钮时它仍然会这样做，我尝试添加ActionListener，但它似乎仍然无法正常工作？

/* Creating Analyze and Reset buttons */

       JButton countButton = new JButton("Analyze");
       //countButton.addActionListener(this);
       south.add(countButton);

       JButton resetButton = new JButton("Reset");
       resetButton.addActionListener(this);
       south.add(resetButton);

/ Text analysis start
    countButton.addActionListener(new ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
    String[] array = textInput.getText().split(" ");
    int maxWordLength = 0;
    int wordLength = 0;
    for (int i = 0; i < array.length; i++) {
      array[i] = array[i].replaceAll("[^a-zA-Z]", ""); 
        wordLength = array[i].length();
        if (wordLength > maxWordLength) {
            maxWordLength = wordLength;
        }
    }
    int[] intArray = new int[maxWordLength + 1];
for (int i = 0; i < array.length; i++) {
    intArray[array[i].length()]++;
}
StringWriter sw = new StringWriter();
PrintWriter out = new PrintWriter(sw);
out.print("<html>");
for (int i = 1; i < intArray.length; i++) {
    out.printf("%d word(s) of length %d<br>", intArray[i], i);
}
out.print("</html>");
wordCountLabel.setText(sw.toString());

} }};

任何帮助将不胜感激！

Answer 1

对于两个按钮按下，您正在调用相同的ActionListener，因此您需要区分actionPerformed()方法中的操作。请使用getActionCommand()：

public void actionPerformed(java.awt.event.ActionEvent e) {
   String command = e.getActionCommand();

   if (command.equals("Analyze")) {
      // doAnalyze();
   } else if (command.equals("Reset")) {
      // doReset();
   }
}

Java Applet按钮

1 个答案: