Swing Timers
I an a novice Java programmer. I have a JApplet class that utilizes Swing. I seen the example code for Swing timers. I seen the chapter on Swing timers. I inserted some test code into my class and it will not accept the parameters for the Timer.
here is the sample code:
int delay = 1000; //milliseconds
ActionListener taskPerformer = new ActionListener() {
public void actionPerformed(ActionEvent evt) {
//...Perform a task...
}
};
new Timer(delay, taskPerformer).start();
The compiler says it can not accept the two parameters, delay and taskPerformer. It wants an empty parameter body. I can create a class in another file that works. Why does it not work in my JApplet. Any Ideas? I have tried it by taking out the extends JApplet and converting it to a Java application. I am going to use a timer to poll a network connection for data. I know there are two kinds of Timers, but since I am using Swing widgets I thought I was supposed to use Swing Timers.
[1026 byte] By [
wwwlouiea] at [2007-11-27 0:50:46]
# 2
I appreciate you help Olivier, I realize I need the javax.swing.Timer import. I have it and it still doesn't work.
Here are all my imports:
import com.sun.media.sound.Toolkit;
import javax.help.*;
import java.util.Date;
import java.awt.event.*;
import javax.swing.*;
import java.applet.Applet;
import java.applet.AppletContext;
import java.awt.*;
import java.awt.event.*;
import java.net.MalformedURLException;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Timer;
import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JDesktopPane;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JProgressBar;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.JToggleButton;
import javax.swing.JToolBar;
import javax.swing.JWindow;
import javax.swing.KeyStroke;
import javax.swing.SwingConstants;
import javax.swing.border.BevelBorder;
import javax.swing.border.TitledBorder;
import org.eclipse.swt.widgets.Composite;
import javax.swing.ImageIcon;
import javax.swing.JCheckBox;
import javax.swing.JRadioButton;
import org.eclipse.swt.widgets.Canvas;
import java.awt.GridLayout;
import java.awt.Point;
import javax.swing.border.EtchedBorder;
import javax.swing.border.SoftBevelBorder;
import java.awt.SystemColor;
import java.awt.Dimension;
import javax.swing.JTextArea;
import java.awt.BorderLayout;
import javax.swing.JSplitPane;
import java.awt.GridBagLayout;
import java.awt.Rectangle;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.Color;
I think my JApplet only lets me create "java.util.Timer'. timers objects. Since the constructor doesn't take any arguments. I wish I knew why. Like I stated earlier, I can create a Swing Timer class, and run them separately.
