Here you can find the source of getDefaultIcon()
private static Icon getDefaultIcon()
//package com.java2s; /*/*from w w w . j a v a2 s .c om*/ IDEA PsiViewer Plugin Copyright (C) 2002 Andrew J. Armstrong This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Author: Andrew J. Armstrong <andrew_armstrong@bigpond.com> */ import javax.swing.*; import java.awt.*; import java.awt.geom.GeneralPath; import java.awt.image.BufferedImage; public class Main { private static Icon getDefaultIcon() { BufferedImage bi = new BufferedImage(18, 18, BufferedImage.TYPE_INT_ARGB_PRE); Graphics2D g2 = bi.createGraphics(); g2.setBackground(Color.red); g2.clearRect(0, 0, bi.getWidth(), bi.getHeight()); g2.setColor(Color.white); g2.setStroke(new BasicStroke(2)); GeneralPath x = new GeneralPath(); x.moveTo(0, 0); x.lineTo(bi.getWidth() - 1, bi.getHeight() - 1); x.moveTo(0, bi.getHeight() - 1); x.lineTo(bi.getWidth() - 1, 0); g2.draw(x); return new ImageIcon(bi); } }