.getText()；不适用于在另一个类中声明的textField变量

public class AnotherClass {
    private JTextField textField;

    public void setTextField(JTextField textField) {
        this.textField = textField;
    }

    public String getTextFieldText() {
        return textField.getText();
    }
}

public class MainClass {
    public static void main(String[] args) {
        JTextField textField = new JTextField();
        AnotherClass anotherClass = new AnotherClass();
        anotherClass.setTextField(textField);

        String text = anotherClass.getTextFieldText();
        System.out.println(text);
    }
}