Here you can find the source of getDefaultLineBorder()
public static Border getDefaultLineBorder()
//package com.java2s; /*// w ww . ja v a 2 s. c o m * UIUtils.java * * Copyright (C) 2002-2015 Takis Diakoumis * * 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 3 * of the License, or 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, see <http://www.gnu.org/licenses/>. * */ import java.awt.Color; import javax.swing.BorderFactory; import javax.swing.UIManager; import javax.swing.border.Border; public class Main { public static Border getDefaultLineBorder() { return BorderFactory.createLineBorder(getDefaultBorderColour()); } /** * Convenience method for consistent border colour. * * @return the system default border colour */ public static Color getDefaultBorderColour() { return getColour("executequery.Border.colour", "controlDkShadow"); } public static Color getColour(String key, String defaultKey) { Color color = UIManager.getColor(key); if (color != null) { return color; } else { return UIManager.getColor(defaultKey); } } public static Color getColour(String key, Color defaultColour) { Color color = UIManager.getColor(key); if (color != null) { return color; } else { return defaultColour; } } }