Java 操作监听器不适用于数组

Question

这段代码有什么问题？当我单击按钮时，我试图让它转到下一个名为 bk 的排序数组。

Book[] bk = new Book[5];
bk = sortArray(bk);
final JTextArea textArea = new JTextArea();

JButton btnNext = new JButton("Next");
btnNext.addActionListener(new ActionListener()
{
    public void actionPerformed(ActionEvent e)
    {
        for (int i = 0; i < bk.length; i++)
            textArea.append("\n" + bk[i+1]);
    }});

但是如果我将其声明为最终的，则排序的行会告诉我将最终声明取出。

这里是最终声明的错误:

Exception in thread "main" java.lang.Error: Unresolved compilation problem: 
The final local variable bk cannot be assigned. It must be blank and not using a compound assignment

并且没有最终声明:

Exception in thread "AWT-EventQueue-0" java.lang.Error: Unresolved compilation problems: 
Cannot refer to a non-final variable bk inside an inner class defined in a different method
Cannot refer to a non-final variable bk inside an inner class defined in a different method

我该如何解决这个问题？

Answer 1

试试这个:

Book[] bk = new Book[5];
// fill bk here
final Book[] bkSorted = sortArray(bk);