java - Problems with GridBagLayout -

i cant transfer of relatet posts simple problem. in order gridbaglayout wrote simple example:

       jframe frame = new jframe();    jpanel main =new jpanel();     frame.setcontentpane(main);    gridbaglayout gbl=new gridbaglayout();    gridbagconstraints gbc = new gridbagconstraints();    main.setlayout(gbl);    jbutton btn1 = new jbutton("1");    jbutton btn2 = new jbutton("2");     gbc.gridx=0;    gbc.gridy=0;    gbc.gridheight=1;    gbc.gridwidth=1;    gbc.fill=gridbagconstraints.west;    gbl.setconstraints(btn1, gbc);    gbc.gridx=0;    gbc.gridy=1;    gbl.setconstraints(btn2, gbc);     frame.setsize(new dimension(200,100));    main.add(btn1);    main.add(btn2);    frame.setvisible(true); 

here have problem neither .fill nor other parameter of gbconstrains sems work. ever 2 buttons in middle of window.

thx in advance

your configuration of gridbagconstraint incorrect:

• fill can take: none, vertical, horizontal or both.
• anchor can use relative location within "cell"
• fill , anchor require use weightx/weighty
• try avoid using gridx , gridy because hard maintain. instead use default value (relative) , can change value of gridwidth/gridheight set 1 (or more if needed) , remainder make layout wrap next line/column (components positionned in order added container.

here working code of yours (although not sure of exact layout targetting):

import java.awt.gridbagconstraints; import java.awt.gridbaglayout;  import javax.swing.jbutton; import javax.swing.jframe; import javax.swing.jpanel; import javax.swing.swingutilities;  public class testgbl {      protected void initui() {         jframe frame = new jframe();         gridbaglayout gbl = new gridbaglayout();         jpanel main = new jpanel(gbl);         frame.setcontentpane(main);         gridbagconstraints gbc = new gridbagconstraints();         gbc.anchor = gridbagconstraints.west;         gbc.weightx = 1.0;         main.setlayout(gbl);         jbutton btn1 = new jbutton("1");         jbutton btn2 = new jbutton("2");          gbl.setconstraints(btn1, gbc);         gbl.setconstraints(btn2, gbc);          main.add(btn1);         main.add(btn2);         frame.pack();         frame.setvisible(true);     }      public static void main(string[] args) {         swingutilities.invokelater(new runnable() {             @override             public void run() {                 new testgbl().initui();             }         });     }  }