I need help With these four questions. 1)Write an event handler that displays th

Question

I need help With these four questions. 1)Write an event handler that displays the message "key Pressed" on the console whenever a key is pressed on the keyboard. 2) Write Java statements to create a new thread and put it in the ready queue. 3) Write a code segment to create three radio button such that whenever one of the buttons is selected the other two buttons are deselected automatically. 4) Write a program to create and display a window of size (300, 300) with the title "An empty Window" the program should exit when the window is closed.

Explanation / Answer

Ive only done #4 for you.

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;

public class Empty extends JFrame
{

   private JPanel contentPane;

   /**
    * Launch the application.
    */
   public static void main(String[] args)
   {
      EventQueue.invokeLater(new Runnable()
      {
         public void run()
         {
            try
            {
               Empty frame = new Empty();
               frame.setVisible(true);
            } catch (Exception e)
            {
               e.printStackTrace();
            }
         }
      });
   }

   /**
    * Create the frame.
    */
   public Empty()
   {
      setTitle("An empty Window");
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setBounds(100, 100, 300, 300);
      contentPane = new JPanel();
      contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
      contentPane.setLayout(new BorderLayout(0, 0));
      setContentPane(contentPane);
   }

}

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