Java开发网 - 关于paint方法和repaint方法

Topic: 关于paint方法和repaint方法

1.关于paint方法和repaint方法	Copy to clipboard
Posted by: GlennLi Posted on: 2005-09-21 09:32 我搞不懂paint方法和repaint方法的功能，以及它们之间的关系。谁能告诉我该怎么使用这两个方法？最好有个例子。

2.Re:关于paint方法和repaint方法 [Re: GlennLi]

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Posted by: GlennLi
Posted on: 2005-09-21 10:48

附加一个例子，不太清楚以后碰到类似的问题该怎么解决。

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
 
public class ShowColors extends JFrame {
   public ShowColors()
   {
      super( "Using colors" ); 
      setSize( 400, 200 );
      show();
   }
 
   public void paint( Graphics g )
   {
      g.setColor( Color.red );
      g.fillRect( 25, 25, 100, 20 );
      g.drawString( "Current RGB: " + g.getColor(), 130, 40 );
 
      g.setColor( Color.yellow );
      g.fillRect( 25, 50, 100, 20 );
      g.drawString( "Current RGB: " + g.getColor(), 130, 65 );
 
      g.setColor( Color.blue );
      g.fillRect( 25, 75, 100, 20 );
      g.drawString( "Current RGB: " + g.getColor(), 130, 90 );
   
      Color c = Color.magenta;
      g.setColor( c );
      g.fillRect( 25, 100, 100, 20 );
      g.drawString( "RGB values: " + c.getRed() + ", " +
                c.getGreen() + ", " + c.getBlue(), 130, 115 );
   }
 
   public static void main( String args[] )
   {
      ShowColors app = new ShowColors();
 
 // mouse closing event
      app.addWindowListener(
         new WindowAdapter() {
            public void windowClosing( WindowEvent e )
            {
               System.exit( 0 );
            }
         }
      );
   }
}