Hi,

Now i'm doing my Machine Learning job about k-NN and k-Means. I need to create graphics about my data coordinate. Basically, i don't have any idea to create this. Is there anyone can help?

This will get you started...

// Fig. 12.5: ShowColors.java
// Demonstrating Colors.
import java.awt.*;
import javax.swing.*;

public class ShowColors extends JFrame {

   // constructor sets window's title bar string and dimensions
   public ShowColors()
   {
      super( "Using colors" );

      setSize( 400, 130 );
      setVisible( true );
   }

   // draw rectangles and Strings in different colors
   public void paint( Graphics g )
   {
      // call superclass's paint method
      super.paint( g );

      // set new drawing color using integers
      g.setColor( new Color( 255, 0, 0 ) );
      g.fillRect( 25, 25, 100, 20 );
      g.drawString( "Current RGB: " + g.getColor(), 130, 40 );

      // set new drawing color using floats
      g.setColor( new Color( 0.0f, 1.0f, 0.0f ) );
      g.fillRect( 25, 50, 100, 20 );
      g.drawString( "Current RGB: " + g.getColor(), 130, 65 );

      // set new drawing color using static Color objects
      g.setColor( Color.BLUE );
      g.fillRect( 25, 75, 100, 20 );
      g.drawString( "Current RGB: " + g.getColor(), 130, 90 );

      // display individual RGB values
      Color color = Color.MAGENTA;
      g.setColor( color );
      g.fillRect( 25, 100, 100, 20 );
      g.drawString( "RGB values: " + color.getRed() + ", " +
         color.getGreen() + ", " + color.getBlue(), 130, 115 );

   } // end method paint

   // execute application
   public static void main( String args[] )
   {
      ShowColors application = new ShowColors();
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
   }

} // end class ShowColors

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Hey... It's just a cut and paste from the publisher.
Besides... Isn't paintComponent() specific to components?
A graphic isn't a component.
As in the example above, I use paint() all the time and have had no issues.

@hfx642 wrote

Besides... Isn't paintComponent() specific to components?

well right for Awt Component there is method paint(), but your example is too old and shows JFrame and for Swing is here method paintComponent(), but for ContentPane is method paint();

A graphic isn't a component.

right that its method

and have had no issues.

that's example and majorities of examples works up to today, that's nothing to do with reall working code

This article has been dead for over six months. Start a new discussion instead.