Java Programming Tutorial - 51 - GUI with JFrame

import javax.swing.JFrame;

public class apples {
   public static void main(String[] args){

      tuna bucky = new tuna();
      bucky.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      bucky.setSize(275, 180);
      bucky.setVisible(true);

   }
}

import java.awt.FlowLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class tuna extends JFrame{

   private JLabel item1;

   public tuna(){
      super("The title bar");
      setLayout(new FlowLayout());

      item1 = new JLabel("This is a sentence");
      item1.setToolTipText("This is gonna show up on hover");
      add(item1);
   }

}