java - Cant get JLabels allign properly -

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i have list of categories , each category has image, need display images 1 after other (4 @ row) spaces between them. have problem displaying last label, seems setbounds method doesn't affect it. created jpanel , add labels containing images panel. source code, added link screenshot

thanks!

    jframe frame = new jframe("test");     jpanel panel = new jpanel();     panel.setbackground(color.white);       java.util.iterator<entry<integer, y2category>> = configfile.categories.entryset().iterator();      int positionx = 50;     int positiony = 50;     int linecounter = 0;      while( it.hasnext() )     {         map.entry<integer, y2category> pairs = (entry<integer, y2category>) it.next();          y2category cat = (y2category) pairs.getvalue();          jlabel label = new jlabel( new imageicon( "img\\main\\black.png" ), jlabel.center );         label.setbounds(positionx,positiony,115,179);         label.setfont(new font("arial", font.plain, 14));          panel.add(label);          positionx += 220;         linecounter++;          if ( linecounter == 4 )         {             linecounter = 0;             positiony += 200;             positionx = 50;         }     }      frame.add(panel);       //imageicon icon = new imageicon("img\\icon.jpg");     //frame.seticonimage(icon.getimage());     frame.setresizable( false );      frame.setdefaultcloseoperation(jframe.exit_on_close);       frame.setsize(900,900);     dimension dim = toolkit.getdefaulttoolkit().getscreensize();     frame.setlocation(dim.width/2-frame.getsize().width/2, dim.height/2-frame.getsize().height/2);       frame.setvisible(true);

screen shot

screen shot

using null layout never recommendable. setbounds() method sets location static , unsuitable dynamic ui. when need add component in between @ later stage need update of code i.e. modify setbounds() of effected components.

i recommend using gridbaglayout flexible , need set grid components. have written small sample code understand:

public jpanel getcomponentpanel() {    if(null == componentpanel)    {        componentpanel = new jpanel();        gridbaglayout gridbaglayout = new gridbaglayout();        componentpanel.setlayout(gridbaglayout);         // create single constraint reused        gridbagconstraints constraint = new gridbagconstraints();        // insets provide spacing in format (top, left, bottom, right)        constraint.insets = new insets(10, 10, 10, 10);         // gridx x-axis positioning , gridy y-axis positioning        constraint.gridx = 0;        constraint.gridy = 0;        label1 = new jlabel("label 1");        componentpanel.add(label1, constraint);         constraint.gridx = 1;        constraint.gridy = 0;        label2 = new jlabel("label 2");        componentpanel.add(label2, constraint);         constraint.gridx = 2;        constraint.gridy = 0;        label3 = new jlabel("label 3");        componentpanel.add(label3, constraint);         constraint.gridx = 3;        constraint.gridy = 0;        label4 = new jlabel("label 4");        componentpanel.add(label4, constraint);         constraint.gridx = 0;        constraint.gridy = 1;        label5 = new jlabel("label 5");        componentpanel.add(label5, constraint);         .        .        .        .         constraint.gridx = 3;        constraint.gridy = 3;        labelxyz = new jlabel("label 5");        componentpanel.add(labelxyz, constraint);    }     return componentpanel; }

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