public class BooleanTest {
    public static void main(String args[]) {
        final Object[] objarray = new Object[2];
        try {
            objarray[0] = "Hello World!";
            objarray[1] = false;
        } catch (NullPointerException e) {
        }
        boolean bool = (boolean) objarray[1];
    }
}

它工作正常,我可以指定布尔没有问题.在询问用户密码时,为什么我不能做同样的事情？

final Object result[] = new Object[2];
try {
    java.awt.EventQueue.invokeAndWait(new Runnable() {
        @Override
        public void run() {
            JPanel panel = new JPanel();
            panel.setLayout(new GridLayout(3,0));
            JLabel label = new JLabel();

            label.setHorizontalAlignment(SwingConstants.LEADING);
            JTextField input = new JTextField();

            input.setHorizontalAlignment(SwingConstants.CENTER);
            JCheckBox checkBox = new JCheckBox("Pair with this device");
            checkBox.setHorizontalAlignment(SwingConstants.LEADING);
            panel.add(label);
            panel.add(input);
            panel.add(checkBox);
            if (wrong) {
                label.setText("Wrong password. Please enter the password from the other device:");
            } else {
                label.setText("Please enter the password from the other device:");
            }
            int response = JOptionPane.showConfirmDialog(SendGUI.this,panel,"Enter password",JOptionPane.OK_CANCEL_OPTION);
            if (response == JOptionPane.OK_OPTION) {
                result[0] = input.getText();
                result[1] = (boolean)checkBox.isSelected();
            } else {
                result[0] = null;
                result[1] = false;
            }
        }
    });
} catch (InterruptedException e) {
} catch (InvocationTargetException e) {
}
boolean pair = (boolean)result[1]; //inconvertible type,expected boolean found Object

据我所知,我在两种情况下都做同样的事情,但第一个例子编译得很好而第二个例子没有.