java - 如何设置 JButton 以擦除 JTextArea，然后重新添加所有内容以及其他内容？

Question

private void initializeButtonActionPerformed(java.awt.event.ActionEvent evt) {                                                 

List <String> cdList = new ArrayList();
Collections.addAll(cdList, "ExampleG","ExampleB","ExampleR","ExampleX");


List<String> sorted = new ArrayList<String>(cdList);
Collections.sort(sorted);

    bigBox.append("Original Order\n**************\n");

    for (String o : cdList)  {
    bigBox.append(o);
    bigBox.append("\n");
    }

    bigBox.append("\n\nSorted Order\n************\n");

    for (String s : sorted)  {
    bigBox.append(s);
    bigBox.append("\n");
    }

}                                                

private void addButtonActionPerformed(java.awt.event.ActionEvent evt) {

String newCD = cdInput.getText();

List <String> cdList = new ArrayList();
Collections.addAll(cdList, "ExampleG","ExampleB","ExampleR","ExampleX");
cdList.add(""+newCD);

List<String> sorted = new ArrayList<String>(cdList);
Collections.sort(sorted);

    bigBox.append("Original Order\n**************\n");

    for (String o : cdList)  {
    bigBox.append(o);
    bigBox.append("\n");
    }

    bigBox.append("\n\nSorted Order\n************\n");

    for (String s : sorted)  {
    bigBox.append(s);
    bigBox.append("\n");
    }

我需要第二个按钮来简单地添加 cdInput 框中的任何内容。

我应该添加更多的文字，所以我会在这里添加它