import javax.swing.*; 
  
class SwingDemo { 
 
  SwingDemo() { 
 
    // Create a new JFrame container. 
    JFrame jfrm = new JFrame("A Simple Swing Application"); 
 
    // Give the frame an initial size. 
    jfrm.setSize(275, 100); 
 
    // Terminate the program when the user closes the application. 
    jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
 
    // Create a text-based label. 
    JLabel jlab = new JLabel(" Swing defines the modern Java GUI."); 
 
    // Add the label to the content pane. 
    jfrm.add(jlab); 
 
    // Display the frame. 
    jfrm.setVisible(true); 
  } 
 
  public static void main(String args[]) { 
    // Create the frame on the event dispatching thread. 
    SwingUtilities.invokeLater(new Runnable() { 
      public void run() { 
        new SwingDemo(); 
      } 
    }); 
  } 
}

import javax.swing.*;

class SwingDemo { 
 
  SwingDemo() { 
 
    // Create a new JFrame container. 
    JFrame jfrm = new JFrame("A Simple Swing Application"); 
 
    // Give the frame an initial size. 
    jfrm.setSize(275, 100); 
 
    // Terminate the program when the user closes the application. 
    jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
 
    // Create a text-based label. 
    JLabel jlab = new JLabel(" Swing defines the modern Java GUI."); 
 
    // Add the label to the content pane. 
    jfrm.add(jlab); 
 
    // Display the frame. 
    jfrm.setVisible(true); 
  } 
 
  public static void main(String args[]) { 
    // Create the frame on the event dispatching thread. 
    SwingUtilities.invokeLater(new Runnable() { 
      public void run() { 
        new SwingDemo(); 
      } 
    }); 
  } 
}

class Example{
  public static void main(String args[]){
    SwingDemo swg=new SwingDemo();
  }
}