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Display message automatically using Java Swing
Posted on: October 22, 2009 at 12:00 AM

In this section, you will learn how to display message automatically after regular interval of time.

Display message automatically using Java Swing

Here we are going to display message automatically after regular interval of time. For this, we have allowed the user to specify the no of seconds and the message. The method Thread.sleep(time) pauses the execution for the specified number of milliseconds and prevent the message to be displayed. After every 5 seconds, it will display the specified message automatically.

Here is the code

import javax.swing.*;

public class DisplayMessageAutomatically{
public static void main(String args[]){
try {
UIManager.setLookAndFeel(
UIManager. getSystemLookAndFeelClassName () );
}
catch ( Exception e ) {}
int time = 0;
while(true) {
try{
time = Integer.parseInt( JOptionPane.showInputDialog ( "Enter time in second" ));
break;
} catch (NumberFormatException e){
JOptionPane.showMessageDialog( null, "Invalid" );
}
}
time *=1000;
String str = JOptionPane.showInputDialog( "Enter your message" );
if (str == null) return;
while(true){
try {
Thread.sleep(time);
JOptionPane.showMessageDialog( null,str,"Alert", JOptionPane.ERROR_MESSAGE);
} catch (Exception e) {}
}
}
}

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