Here you can find the source of createTopAndCenter(JComponent top, JComponent center)
public static JComponent createTopAndCenter(JComponent top, JComponent center)
//package com.java2s; /*/*from www .java 2 s . c om*/ Copyright 2003-2012 Dmitry Barashev, GanttProject Team This file is part of GanttProject, an opensource project management tool. GanttProject 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 (at your option) any later version. GanttProject 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 GanttProject. If not, see <http://www.gnu.org/licenses/>. */ import java.awt.BorderLayout; import java.awt.Component; import javax.swing.BorderFactory; import javax.swing.JComponent; import javax.swing.JPanel; public class Main { public static JComponent createTopAndCenter(JComponent top, JComponent center) { JPanel result = new JPanel(new BorderLayout()); top.setAlignmentX(Component.LEFT_ALIGNMENT); result.add(top, BorderLayout.NORTH); JPanel planePageWrapper = new JPanel(new BorderLayout()); planePageWrapper.setBorder(BorderFactory.createEmptyBorder(15, 0, 5, 0)); center.setAlignmentX(Component.LEFT_ALIGNMENT); planePageWrapper.add(center, BorderLayout.NORTH); result.add(planePageWrapper, BorderLayout.CENTER); return result; } }