我想创建一个方法，在两个不同的java窗口中将值从文本字段传递到复选框

我创建了一个显示当前时间的程序，可以通过按钮打开第二个窗口来设置报警。在第二个窗口中输入报警时间后，您可以使用复选框在第一个窗口中激活报警。我已经创建了两个窗口，但我不确定如何将第二个窗口中的报警变量传递到第一个窗口中的复选框

第一个窗口的代码：

enter code here
    import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.JOptionPane;
import java.util.*;

public class Exercise18_21 extends JFrame {

private JTextField jtfHour, jtfMinute, jtfSeconds, jtfAlarm;
private JLabel hour, minute, seconds;
private JCheckBox jchkAlarm;
private JButton jbtAlarm;
private SetAlarm setAlarm = new SetAlarm();
private JFrame SetAlarmFrame = new JFrame();
private javax.swing.Timer  t;
private int alarmHour;
    //private int num1, num2, num3;


public Exercise18_21() 
{
setLayout(new GridLayout(3,1,2,2));
GridBagConstraints c = new GridBagConstraints();

hour = new JLabel("Hour");
add(hour, c);

minute = new JLabel("Minutes");
add(minute, c);

seconds = new JLabel("Seconds");
add(seconds, c);

jtfHour = new JTextField(10);
add(jtfHour, c);

jtfMinute= new JTextField(5);
add(jtfMinute, c);

jtfSeconds = new JTextField(5);
add(jtfSeconds, c);

jchkAlarm = new JCheckBox("Alarm");
add(jchkAlarm, c);

jbtAlarm = new JButton("Set Alarm");
add(jbtAlarm, c);

javax.swing.Timer t = new javax.swing.Timer(1000, new ClockListener());
    t.start();

jbtAlarm.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e) 
{
SetAlarmFrame.setVisible(true);
}
});

jchkAlarm.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e) 
{

    Calendar calendar = new GregorianCalendar();
        int h = calendar.get(Calendar.HOUR_OF_DAY);
        jtfHour.setText("" + h);
        int m = calendar.get(Calendar.MINUTE);
        jtfMinute.setText("" + m);
        int S = calendar.get(Calendar.SECOND);
        jtfSeconds.setText("" + S);
        //System.out.print(h);
        //System.out.print(m);
        //System.out.print(S);


}
});



SetAlarmFrame.add(setAlarm);
SetAlarmFrame.pack();
SetAlarmFrame.setTitle("Set Alarm");


}//end of constructor
private int getHour() {

    Calendar calendar = new GregorianCalendar();
    int alarmHour = calendar.get(Calendar.HOUR_OF_DAY);



return alarmHour; // Return hour
}

 /////////////////////////////////////////////// inner class ClockListener
class ClockListener implements ActionListener 
{

    public void actionPerformed(ActionEvent e) 
    {

        Calendar calendar = new GregorianCalendar();
        int h = calendar.get(Calendar.HOUR_OF_DAY);
        jtfHour.setText("" + h);
        int m = calendar.get(Calendar.MINUTE);
        jtfMinute.setText("" + m);
        int S = calendar.get(Calendar.SECOND);
        jtfSeconds.setText("" + S);

    }
}

public static void main(String [] arg) {
Exercise18_21 gui = new Exercise18_21();
gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
gui.setVisible(true);
gui.setSize(200, 100);
gui.setTitle("Exercise18_21");
}//end of main
}//end of exercise18_21 class 

设置报警的第二个窗口的代码：

enter code here
    import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.JOptionPane;
import java.util.*;

public class SetAlarm extends JPanel {

private JTextField jtfHour2, jtfMinute, jtfSeconds;
private JLabel hour, minute, seconds;
private JButton jbtOK, jbtCancel;
private int num1, num2, num3;

public SetAlarm() 
{
setLayout(new GridLayout(4,2,2,2));
GridBagConstraints c = new GridBagConstraints();

hour = new JLabel("Hour");
add(hour, c);

jtfHour2 = new JTextField(10);
add(jtfHour2, c);

minute = new JLabel("Minutes");
add(minute, c);

jtfMinute= new JTextField(5);
add(jtfMinute, c);

seconds = new JLabel("Seconds");
add(seconds, c);

jtfSeconds = new JTextField(5);
add(jtfSeconds, c);

jbtOK = new JButton("OK");
add(jbtOK, c);

jbtCancel = new JButton("Cancel");

add(jbtCancel, c);

jbtCancel.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e) 
{
    System.exit(0);
}
});


jbtOK.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e) 
{
    int alarmHour  = getHour();

        //int num1 = Integer.parseInt(jtfHour2.getText().trim());
        //int num2 = Integer.parseInt(jtfMinute.getText().trim());
        //int num3 = Integer.parseInt(jtfSeconds.getText().trim());

        System.out.print(alarmHour);
        System.out.print(num2);
        System.out.print(num3);
}
});

}//end of constructor

public void showHour(int alarmHour)
{
this.alarmHour = alarmHour;

} 

public Dimension getPreferredSize() 
{
return new Dimension(200, 200);

}//end of Dimension getPreferredSize
}//end of setAlarm class 

第二个窗口的新代码：

    public class SetAlarm extends JDialog {

private JTextField jtfHour2, jtfMinute, jtfSeconds;
private JLabel hour, minute, seconds;
private JButton jbtOK, jbtCancel;
protected int num1, num2, num3;



public SetAlarm() 
{
setLayout(new GridLayout(4,2,2,2));
GridBagConstraints c = new GridBagConstraints();

hour = new JLabel("Hour");
add(hour, c);

jtfHour2 = new JTextField(10);
add(jtfHour2, c);

minute = new JLabel("Minutes");
add(minute, c);

jtfMinute= new JTextField(5);
add(jtfMinute, c);

seconds = new JLabel("Seconds");
add(seconds, c);

jtfSeconds = new JTextField(5);
add(jtfSeconds, c);

jbtOK = new JButton("OK");
add(jbtOK, c);

jbtCancel = new JButton("Cancel");

add(jbtCancel, c);

jbtCancel.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e) 
{
    setVisible(false);
    System.exit(0);
}
});


jbtOK.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e) 
{


        int num1 = Integer.parseInt(jtfHour2.getText().trim());
        //int num2 = Integer.parseInt(jtfMinute.getText().trim());
        //int num3 = Integer.parseInt(jtfSeconds.getText().trim());

        //System.out.print(alarmHour);
        //System.out.print(num2);
        //System.out.print(num3);
        setVisible(false);
}
});

}//end of constructor

public int getHour()
{ 
return num1;

} 

public Dimension getPreferredSize() 
{
return new Dimension(200, 200);

}//end of Dimension getPreferredSize
}//end of setAlarm class 

第一个窗口的新代码

public class Exercise18_21 extends JFrame {

private JTextField jtfHour, jtfMinute, jtfSeconds, jtfAlarm;
private JLabel hour, minute, seconds;
private JCheckBox jchkAlarm;
private SetAlarm setAlarm1= new SetAlarm();;
private JButton jbtAlarm;

private int h1, m1, s1;
//private JFrame SetAlarmFrame = new JFrame();
private javax.swing.Timer  t;

    //private int num1, num2, num3;


public Exercise18_21() 
{
setLayout(new GridLayout(3,1,2,2));
GridBagConstraints c = new GridBagConstraints();

hour = new JLabel("Hour");
add(hour, c);

minute = new JLabel("Minutes");
add(minute, c);

seconds = new JLabel("Seconds");
add(seconds, c);

jtfHour = new JTextField(10);
add(jtfHour, c);

jtfMinute= new JTextField(5);
add(jtfMinute, c);

jtfSeconds = new JTextField(5);
add(jtfSeconds, c);

jchkAlarm = new JCheckBox("Alarm");
add(jchkAlarm, c);

jbtAlarm = new JButton("Set Alarm");
add(jbtAlarm, c);

javax.swing.Timer t = new javax.swing.Timer(1000, new ClockListener());
    t.start();

jbtAlarm.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e) 
{
setAlarm1.setVisible(true);
}
    });

jchkAlarm.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e) 
{




        setAlarm1.setModal(true) ;
        setAlarm1.getHour();
        int h1 = Integer.parseInt(jtfHour.getText().trim());
        System.out.print(setAlarm1.num1);


}
});








//SetAlarmFrame.add(setAlarm);
//SetAlarmFrame.pack();
//SetAlarmFrame.setTitle("Set Alarm");


}//end of constructor


/////////////////////////////////////////////// inner class ClockListener
class ClockListener implements ActionListener 
{

    public void actionPerformed(ActionEvent e) 
    {

        Calendar calendar = new GregorianCalendar();
        int h = calendar.get(Calendar.HOUR_OF_DAY);
        jtfHour.setText("" + h);
        int m = calendar.get(Calendar.MINUTE);
        jtfMinute.setText("" + m);
        int S = calendar.get(Calendar.SECOND);
        jtfSeconds.setText("" + S);

    }
}

public static void main(String [] arg) {
Exercise18_21 gui = new Exercise18_21();
gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
gui.setVisible(true);
gui.setSize(200, 100);
gui.setTitle("Exercise18_21");
}//end of main
}//end of exercise18_21 class 

---

只需从JDialog扩展第二帧。 将操作侦听器添加到对话框中的“确定”和“取消”按钮，并在这两个按钮中调用setVisible（false）， 在对话框中创建一个返回所需报警时间的方法（如getAlarmTime（）） 按如下方式调用第二帧（对话框）：

    SampleDialog dialog = new SampleDialog() ;
dialog.setModal(true) ;
dialog.setVisible(true) ;
    Date alarmTime = dialog.getAlarmTime() ;

---

然后对alarmTime对象执行任何您想要的操作。

我几乎得到了它，但我的变量num1始终为零。setAlarm1.getHour（）；系统输出打印（设置报警1.num1）；您确定您的对话框扩展了JDialog并设置了dialog.setModal（true）吗？确保对话框中有一个按钮，按钮上有一个操作侦听器，当按下按钮时，首先执行如下操作：num1=textField.getText（）；然后这个.setVisible（false）；请将您的对话框代码和调用此对话框的部分发送给我。这是您的问题：在第二个窗口代码中，您编写了jbtOK.addActionListener（new ActionListener（）{public void actionPerformed（ActionEvent e）{int num1=Integer.parseInt（jtfHour2.getText（）.trim（））；注意，您创建了名为num1的新变量，这不是您在类中定义为字段的num1，去掉“int”就完成了。在第一个窗口中的ActionOperationFormed代码中，您必须这样做：setAlarm1.setModal（true）；setAlarm1.setVisible（true）；System.out.print（setAlarm1.num1）；