Tuesday, December 23, 2014

Display polygon using GUI

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

            public class Main extends JPanel

   public void paintComponent(Graphics g)

      super.paintComponent(g);

      Polygon p = new Polygon();

      for (int i = 0; i < 5; i++)

      p.addPoint((int)

      (100 + 50 * Math.cos(i * 2 * Math.PI / 5)),

      (int) (100 + 50 * Math.sin(i * 2 * Math.PI / 5)));

      g.drawPolygon(p);

   public static void main(String[] args)

      JFrame frame = new JFrame();

      frame.setTitle("Polygon");

      frame.setSize(350, 250);

      frame.addWindowListener(new WindowAdapter()

         public void windowClosing(WindowEvent e)

            System.exit(0);

});

      Container contentPane = frame.getContentPane();

      contentPane.add(new Main());

      frame.setVisible(true);

Display text in a rectangle

import java.awt.*;

import javax.swing.*

            public class Main extends JPanel

   public void paint(Graphics g)

      g.setFont(new Font("",0,100));

      FontMetrics fm = getFontMetrics(new Font("",0,100));

      String s = "message";

      int x = 5;

      int y = 5;

      for (int i = 0; i < s.length(); i++)

         char c = s.charAt(i);

         int h = fm.getHeight();

         int w = fm.charWidth(c);

         g.drawRect(x, y, w, h);

         g.drawString(String.valueOf(c), x, y + h);

         x = x + w;

   public static void main(String[] args)

      JFrame frame = new JFrame();

      frame.setDefaultCloseOperation(JFrame.Exit_on_close);

      frame.setContentPane(new Main());

      frame.setSize(500, 700);

      frame.setVisible(true);