Heavy and light component mixing

[Bojevnik]

HI, i've got this problem.
My program doesnt show button on startup(but it does show it when i move my cursor over it).
What do i have to do that it will display button on startup?

Code:

/*

 * PrikazOzadja.java

 *

 * Created on Sreda, 18 julij 2007, 18:29

 *

 * To change this template, choose Tools | Template Manager

 * and open the template in the editor.

 */



package knjiga;



/**

 *

 * @author Bojevnik 

 */



import java.awt.*;

import java.awt.event.*;

import java.applet.*;

import java.util.*;

import java.awt.geom.*;

import javax.sound.sampled.*;

import java.io.*;

import javax.sound.midi.*;

import java.net.*;

import javax.swing.*;





public class PrikazOzadja extends JApplet{

    int width;

    int height;

    Image img;

    JButton test =  new JButton("TEST");

    /** Creates a new instance of PrikazOzadja */

    public PrikazOzadja() {

    }

    public void init(){

      setSize(500,500);  

      img= getImage(getFURL("D:/ozadjeTest.jpg"));

      setLayout(null);

      test.setBounds(100,100,100,100);

      //test.grabFocus();

      add(test);

      test.setFocusPainted(true);

     

    }

    public void paint(Graphics g){

        width = getSize().width;

        height = getSize().height;

        Graphics2D g2d = (Graphics2D) g;

        g2d.drawImage(img,0, 0, width, height, this);

    }

    public URL getURL(String filename){

        URL u = null;

        try{

            u = getClass().getResource(filename);

            if(u==null) throw new Exception("url je null");

        }

        catch(Exception ex){

            JOptionPane.showMessageDialog(this,ex.getMessage());

        }

        return u;

    }

    private URL getFURL(String filename){

        File im=new File(filename);

        URL u=null;

        try{

            u=im.toURL();

        }

        catch(Exception ex){

            JOptionPane.showMessageDialog(this,ex.getMessage());

        }

        return u;

    }

    

}

[hardwired]

The paint method is a Container method and is called (by java) to draw a container and its child components. Drawing in paint when you are also adding child components will draw on top of the components. Here's another way.

Code:

//  <applet code="PO" width="300" height="300"></applet>
import java.awt.*;
import java.io.*;
import java.net.*;
import javax.swing.*;

public class PO extends JApplet{
    JButton test =  new JButton("TEST");

    public PO() {}

    public void init(){
        setSize(500,500);  
        Image img= getImage(//getFURL("D:/ozadjeTest.jpg"));
                      getURL("images/cougar.jpg"));
        // Use MediaTracker to load image data.
        ImagePanel imagePanel = new ImagePanel(img);
        add(imagePanel, BorderLayout.CENTER);
        imagePanel.setLayout(null);
        test.setBounds(100,100,100,100);
        //test.grabFocus();
        imagePanel.add(test);
        test.setFocusPainted(true);
    }

    private class ImagePanel extends JPanel {
        Image img;

        ImagePanel(Image img) {
            this.img = img;
        }

        public void paintComponent(Graphics g){
            super.paintComponent(g);
            int width = getSize().width;
            int height = getSize().height;
            Graphics2D g2d = (Graphics2D) g;
            g2d.drawImage(img,0, 0, width, height, this);
        }
    }

    public URL getURL(String filename){
        URL u = null;
        try{
            u = getClass().getResource(filename);
            if(u==null) throw new Exception("url je null");
        }catch(Exception ex){
            JOptionPane.showMessageDialog(this,ex.getMessage());
        }
        return u;
    }

    private URL getFURL(String filename){
        File im=new File(filename);
        URL u=null;
        try{
            u=im.toURL();
        }catch(Exception ex){
            JOptionPane.showMessageDialog(this,ex.getMessage());
        }
        return u;
    }
}

[Bojevnik]

Thank you, it works.