swing - Java JButton sizing issue -

people. started working on simple games advance in knowledge of swing. needed use jbuttons 1 of projects, did. here's problem...

when opened window, instead of seeing normal screen loaded images, whole screen last button added frame. tried using setsize() function button still super large , filled screen.

code:

import javax.swing.jpanel; import javax.swing.borderfactory; import java.awt.color; import java.awt.dimension; import java.awt.graphics; import javax.swing.swingutilities; import javax.swing.jframe; import java.awt.image; import java.io.*; import java.net.url; import javax.imageio.*; import java.awt.image.*; import java.awt.font; import java.awt.*; import java.awt.event.*; import javax.swing.*;  public class engine {     public static int chips = 5000;     public static string c = chips+"";     public static void main(string[] args) {         swingutilities.invokelater(new runnable() {             public void run() {                 gui();                 }             });     }      private static void gui() {         jframe f = new jframe("pinnacle baccarat");         f.setdefaultcloseoperation(jframe.exit_on_close);         f.setpreferredsize(new dimension(768, 512));     f.add(new p());     engine e2 = new engine();     jbutton bet1 = new jbutton("bet 1 chip");     jbutton bet2 = new jbutton("bet 10 chips");     jbutton bet3 = new jbutton("bet 100 chips");     jbutton bet4 = new jbutton("bet 1k chips");     jbutton bet5 = new jbutton("bet 10k chips");     jbutton bet6 = new jbutton("bet 100k chips");     if(e2.chips < 1){bet1.setenabled(false);}     if(e2.chips > 0){bet1.setenabled(true);}     if(e2.chips < 10){bet2.setenabled(false);}     if(e2.chips > 9){bet2.setenabled(true);}         if(e2.chips < 100){bet3.setenabled(false);}     if(e2.chips > 99){bet3.setenabled(true);}     if(e2.chips < 1000){bet4.setenabled(false);}     if(e2.chips > 999){bet4.setenabled(true);}     if(e2.chips < 10000){bet5.setenabled(false);}     if(e2.chips > 9999){bet5.setenabled(true);}     if(e2.chips < 100000){bet6.setenabled(false);}     if(e2.chips > 99999){bet6.setenabled(true);}     bet1.setpreferredsize(new dimension(96, 32));     bet2.setpreferredsize(new dimension(96, 32));     bet3.setpreferredsize(new dimension(96, 32));     bet4.setpreferredsize(new dimension(96, 32));     bet5.setpreferredsize(new dimension(96, 32));     bet6.setpreferredsize(new dimension(96, 32));                    f.add(bet1);     f.add(bet2);     f.add(bet3);     f.add(bet4);     f.add(bet5);     f.add(bet6);     f.pack();         f.setvisible(true);      } } class p extends jpanel {     public p() {     }     public void paintcomponent(graphics g) {     engine eng = new engine();         super.paintcomponent(g);                bufferedimage chip = null;     bufferedimage table = null;     try {             table = imageio.read(new file("bg.png"));     } catch (ioexception e) {     }     try {             chip = imageio.read(new file("chip.png"));     } catch (ioexception e) {     }     g.drawimage(table, 0, 0, null);     g.drawimage(chip, 4, 446, null);     g.setcolor(new color(255, 0, 0));     g.setfont(new font("default", font.bold, 20));     g.drawstring(eng.c, 36, 467);     }   } 

can help? edit: need know how place buttons in places. edit 2: after using f.setlayout(null), buttons work paint method , pictures broken: don't show. can help?

its because have not specified layout manager add this:

f.setlayout(new flowlayout()); 

also learn how set positioning of stuff read layout managers or use setlayout(null) panel , use setbounds() method set x , y position of element.