Re: [jpassion_java] Digest for jpassion_java@googlegroups.com - 3 Messages in 3 Topics

[ola sodiq]

On Fri, Apr 26, 2013 at 8:15 AM, <jpassi...@googlegroups.com> wrote:

  Today's Topic Summary

Group: http://groups.google.com/group/jpassion_java/topics

• JFrame_AddJPanelToJFrame_JPanel_paint [1 Update]
• JFrame_AddJPanelToJFrame_JPanel_paint" sample application in Swing, Java Programming course [1 Update]
• "paint" method [1 Update]

 JFrame_AddJPanelToJFrame_JPanel_paint

Haichien Nguyen <haich...@gmail.com> Apr 24 01:52PM -0700  

Hi there
 
I just want to ask about "JFrame_AddJPanelToJFrame_**JPanel_paint" sample
application in Swing, Java Programming course. There is method "paint" in
this project, which never be called anywhere in the project, but it still
being executed. I don't understand that. Please explain for me.
 
Best regards


 

 JFrame_AddJPanelToJFrame_JPanel_paint" sample application in Swing, Java Programming course

Haichien Nguyen <haich...@gmail.com> Apr 24 05:41PM -0700  

Hi there
 
I just want to ask about "JFrame_AddJPanelToJFrame_**JPanel_paint" sample
application in Swing, Java Programming course. There is method "paint" in
this project, which never be called anywhere in the project, but it still
being executed. I don't understand that. Please explain for me.
 
 
--
Best regards,


 

 "paint" method

Haichien Nguyen <haich...@gmail.com> Apr 24 09:54PM -0700  

Hi All
 
Please look at the code below and tell me why "paint" method run without
being callled? For your reference it is sample 1.3 "
JFrame_AddJPanelToJFrame_JPanel_paint " in Swing - Java programming
 
Thank you
 
=============
 
 
package mypackage;
 
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;
 
public class Main extends JPanel {

Main() {
setBackground(Color.black);
}

public void paint(Graphics g) {
g.setColor(new Color(0,255,0)); //green
g.setFont(new Font("Helvetica",Font.PLAIN,16));
g.drawString("Hello GUI World!", 30, 100);
g.setColor(new Color(1.0f,0,0)); //red
g.fillRect(30, 100, 150, 10);
}

/* need to place Panel in Frame or other Window */
public static void main(String args[]) {

JFrame jFrame = new JFrame("Testing Graphics Panel");
Main gp = new Main(); // It is JPanel
jFrame.add(gp);
jFrame.setSize(600, 300);
jFrame.setVisible(true);
}
}


 

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