You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
61 lines
1.8 KiB
Java
61 lines
1.8 KiB
Java
This is a simple text clock. See
|
|
|
|
javax.swing.Timer for an explanation of how use this simple timer class.
|
|
|
|
|
|
|
|
|
|
import java.awt.*;
|
|
import java.awt.event.*;
|
|
import javax.swing.*;
|
|
import javax.swing.event.*;
|
|
import java.util.Calendar; // only need this one class
|
|
|
|
/// TextClock
|
|
public class TextClock {
|
|
|
|
main
|
|
public static void main(String[] args) {
|
|
JFrame clock = new TextClockWindow();
|
|
clock.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
|
|
clock.setVisible(true);
|
|
}//end main
|
|
}//endclass TextClock
|
|
|
|
|
|
////// TextClockWindow
|
|
class TextClockWindow extends JFrame {
|
|
|
|
instance variables
|
|
private JTextField timeField; // set by timer listener
|
|
|
|
|
|
constructor
|
|
public TextClockWindow() {
|
|
// Build the GUI - only one panel
|
|
timeField = new JTextField(6);
|
|
timeField.setFont(new Font("sansserif", Font.PLAIN, 48));
|
|
|
|
Container content = this.getContentPane();
|
|
content.setLayout(new FlowLayout());
|
|
content.add(timeField);
|
|
|
|
this.setTitle("Text Clock");
|
|
this.pack();
|
|
|
|
// Create a 1-second timer and action listener for it.
|
|
// Specify package because there are two Timer classes
|
|
javax.swing.Timer t = new javax.swing.Timer(1000,
|
|
new ActionListener() {
|
|
public void actionPerformed(ActionEvent e) {
|
|
Calendar now = Calendar.getInstance();
|
|
int h = now.get(Calendar.HOUR_OF_DAY);
|
|
int m = now.get(Calendar.MINUTE);
|
|
int s = now.get(Calendar.SECOND);
|
|
timeField.setText("" + h + ":" + m + ":" + s);
|
|
}
|
|
});
|
|
t.start(); // Start the timer
|
|
}//end constructor
|
|
}//endclass TextClock
|