Java JFormattedTextField和Integer对象之间的比较

我有点奇怪的问题

我正在写一个简单的数独程序。现在，除此方法外，其他方法都能正常工作：

public static void checkAnswerKey()
    {
        int rowCounter = 0;
        int columnCounter = 0;

        System.out.println("The answers that are correct are (F is incorrect): ");

        for (rowCounter = 0; rowCounter <= 8; rowCounter += 1)
        {
            for (columnCounter = 0; columnCounter <= 8; columnCounter += 1)
            {
                if (gui.userInputFormattedArray[rowCounter][columnCounter].getText() == io.puzzleAnswerArray[rowCounter][columnCounter].toString())
                {
                    gui.userInputFormattedArray[rowCounter][columnCounter].setBackground(gui.correctAnswer);
                    System.out.print(gui.userInputFormattedArray[rowCounter][columnCounter].getText() + " ");
                }
                else
                {
                    gui.userInputFormattedArray[rowCounter][columnCounter].setBackground(gui.incorrectAnswer);
                    System.out.print(gui.userInputFormattedArray[rowCounter][columnCounter].getText() + io.puzzleAnswerArray[rowCounter][columnCounter].toString() + " ");
                    //System.out.print("F" + " ");
                }
            }
            System.out.println();
        }

    public static JFormattedTextField[][] userInputFormattedArray = new JFormattedTextField[9][9];
    //Create the container.
    public Container pane = getContentPane();
    //The font the game uses.
    public Font gameFont = new Font("Arial", Font.PLAIN, 30);
    //Correct and incorrect answer colors.
    static Color correctAnswer = new Color(100, 255, 100);
    static Color incorrectAnswer = new Color(255, 100, 100);

这两种方法在构造函数中启动：

public void showTextFields()
    {
        int rowCounter = 0;
        int columnCounter = 0;

        for (rowCounter = 0; rowCounter <= 8; rowCounter += 1)
        {
            for (columnCounter = 0; columnCounter <= 8; columnCounter += 1)
            {
                userInputFormattedArray[rowCounter][columnCounter] = new JFormattedTextField();
                pane.add(userInputFormattedArray[rowCounter][columnCounter]);
                userInputFormattedArray[rowCounter][columnCounter].setFont(gameFont);
                userInputFormattedArray[rowCounter][columnCounter].setHorizontalAlignment(JTextField.CENTER);
            }
        }
    }

    public void setTextFields()
    {
        String heldString;
        boolean notEditable = false;
        int rowCounter = 0;
        int columnCounter = 0;

        for (rowCounter = 0; rowCounter <= 8; rowCounter += 1)
        {
            for (columnCounter = 0; columnCounter <= 8; columnCounter += 1)
            {
                if (game.puzzleUserShownArray[rowCounter][columnCounter] != 0)
                {
                    heldString = game.puzzleUserShownArray[rowCounter][columnCounter].toString();
                    userInputFormattedArray[rowCounter][columnCounter].setText(heldString);
                    userInputFormattedArray[rowCounter][columnCounter].setEditable(notEditable);
                }
            }
        }
    }

public void showTextFields（）
{
int rowCounter=0；
int columnCounter=0；
对于（rowCounter=0；rowCounter，您正在使用
=
进行字符串相等性检查

if(gui.userInputFormattedArray[rowCounter][columnCounter].getText() == io.puzzleAnswerArray[rowCounter][columnCounter].toString()) {

使用
.equals（）
方法。这不仅适用于字符串，而且适用于任何类型的对象。对于对象
==
检查对象的标识

尝试：

您正在使用
==
进行字符串相等性检查

if(gui.userInputFormattedArray[rowCounter][columnCounter].getText() == io.puzzleAnswerArray[rowCounter][columnCounter].toString()) {

使用
.equals（）
方法。这不仅适用于字符串，而且适用于任何类型的对象。对于对象
==
检查对象的标识

尝试：

谢谢你，你的答案很完美。很高兴知道。谢谢你，你的答案很完美。很高兴知道。
if(gui.userInputFormattedArray[rowCounter][columnCounter].getText() == io.puzzleAnswerArray[rowCounter][columnCounter].toString()) {

if(gui.userInputFormattedArray[rowCounter][columnCounter].getText().equals(io.puzzleAnswerArray[rowCounter][columnCounter].toString())) {