java - Cannot setSize JTextPane/JScrollPane -


i have jframe borderlayout , have jtextpane/jscrollpane @ north splitpane in center , jpanel 4 jbuttons on @ south. frame's size (500, 470). want jtextpane fill of window set preferredsize (500, 450) has no effect.

here picture happens: http://postimg.org/image/3wslmppx7/

and here code:

public void initgui() {     configwindow = new jframe();     configwindow.settitle(node.getdispname()+ " [" + node.getip() + "] configuration");     configwindow.setsize(500, 470);     configwindow.setlocation(topologymain.dim.width/2-configwindow.getsize().width/2, topologymain.dim.height/2-configwindow.getsize().height/2);     configwindow.getcontentpane().setlayout(new borderlayout());      configpane = new jtextpane();     configpane.seteditable(true);     configpane.setname("config");     configpane.setpreferredsize(new dimension(500, 450));     configpane.setbackground(color.black);     configpane.setcursor(new cursor(cursor.text_cursor));      scrollpane = new jscrollpane(configpane);     scrollpane.setpreferredsize(new dimension(500, 450));      configwindow.getcontentpane().add(scrollpane, borderlayout.north);       buttonpanel = new jpanel();     buttonpanel.setlayout(new gridbaglayout());     //buttonpanel.setpreferredsize(new dimension(500, 20));     gbc.insets = new insets(5,5,5,5);      read = new jbutton("read");     gbc.gridx = 0;     gbc.gridy = 1;     gbc.fill = gridbagconstraints.horizontal;     buttonpanel.add(read, gbc);      apply = new jbutton("apply");     gbc.gridx = 1;     gbc.gridy = 1;     gbc.fill = gridbagconstraints.horizontal;     buttonpanel.add(apply, gbc);      load = new jbutton("load");     gbc.gridx = 2;     gbc.gridy = 1;     gbc.fill = gridbagconstraints.horizontal;     buttonpanel.add(load, gbc);      save = new jbutton("save");     save.setenabled(false);     gbc.gridx = 3;     gbc.gridy = 1;     gbc.fill = gridbagconstraints.horizontal;     buttonpanel.add(save, gbc);      configwindow.getcontentpane().add(buttonpanel, borderlayout.south);      splitpane = new jsplitpane(jsplitpane.vertical_split, scrollpane, buttonpanel);     splitpane.setenabled(true);     configwindow.getcontentpane().add(splitpane, borderlayout.center);      configwindow.setvisible(true);      filechooser = new jfilechooser(); }

solution gabriel negut in comments:

use pack() - call after have added window.

from the documentation:

public void pack()

causes window sized fit preferred size , layouts of subcomponents. resulting width , height of window automatically enlarged if either of dimensions less minimum size specified previous call setminimumsize method.

if window and/or owner not displayable yet, both of them made displayable before calculating preferred size. window validated after size being calculated.


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